801
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Li Z, Fu X, Tian Y, Xu J, Gao J, Wang B, Han H, Wang L, Zhang F, Zhu Y, Huang Y, Peng R, Yao Q. Overexpression of a trypanothione synthetase gene from Trypanosoma cruzi, TcTrys, confers enhanced tolerance to multiple abiotic stresses in rice. Gene 2019; 710:279-290. [PMID: 31200083 DOI: 10.1016/j.gene.2019.06.018] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2019] [Revised: 05/22/2019] [Accepted: 06/10/2019] [Indexed: 10/26/2022]
Abstract
Plants are frequently exposed to variable environmental stresses that adversely affect plant growth, development and agricultural production. In this study, a trypanothione synthetase gene from Trypanosoma cruzi, TcTryS, was chemically synthesized and its roles in tolerance to multiple abiotic stresses were functionally characterized by generating transgenic rice overexpressing TcTryS. Overexpression of TcTryS in rice endows transgenic plants with hypersensitivity to ABA, hyposensitivity to NaCl- and mannitol-induced osmotic stress at the seed germination stage. TcTryS overexpression results in enhanced tolerance to drought, salt, cadmium, and 2,4,6-trichlorophenol stresses in transgenic rice, simultaneously supported by improved physiological traits. The TcTryS-overexpression plants also accumulated greater amounts of proline, less malondialdehyde and more transcripts of stress-related genes than wild-type plants under drought and salt stress conditions. In addition, TcTryS might play a positive role in maintaining chlorophyll content under 2,4,6-trichlorophenol stress. Histochemical staining assay showed that TcTryS renders transgenic plants better ROS-scavenging capability. All of these results suggest that TcTryS could function as a key regulator in modulation of abiotic stress tolerance in plant, and may have applications in the engineering of economically important crops.
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Affiliation(s)
- Zhenjun Li
- Shanghai Key Laboratory of Agricultural Genetics and Breeding, Agro-Biotechnology Research Institute, Shanghai Academy of Agricultural Sciences, 2901 Beidi Rd, Shanghai 201106, PR China
| | - Xiaoyan Fu
- Shanghai Key Laboratory of Agricultural Genetics and Breeding, Agro-Biotechnology Research Institute, Shanghai Academy of Agricultural Sciences, 2901 Beidi Rd, Shanghai 201106, PR China
| | - Yongsheng Tian
- Shanghai Key Laboratory of Agricultural Genetics and Breeding, Agro-Biotechnology Research Institute, Shanghai Academy of Agricultural Sciences, 2901 Beidi Rd, Shanghai 201106, PR China
| | - Jing Xu
- Shanghai Key Laboratory of Agricultural Genetics and Breeding, Agro-Biotechnology Research Institute, Shanghai Academy of Agricultural Sciences, 2901 Beidi Rd, Shanghai 201106, PR China
| | - Jianjie Gao
- Shanghai Key Laboratory of Agricultural Genetics and Breeding, Agro-Biotechnology Research Institute, Shanghai Academy of Agricultural Sciences, 2901 Beidi Rd, Shanghai 201106, PR China
| | - Bo Wang
- Shanghai Key Laboratory of Agricultural Genetics and Breeding, Agro-Biotechnology Research Institute, Shanghai Academy of Agricultural Sciences, 2901 Beidi Rd, Shanghai 201106, PR China
| | - Hongjuan Han
- Shanghai Key Laboratory of Agricultural Genetics and Breeding, Agro-Biotechnology Research Institute, Shanghai Academy of Agricultural Sciences, 2901 Beidi Rd, Shanghai 201106, PR China
| | - Lijuan Wang
- Shanghai Key Laboratory of Agricultural Genetics and Breeding, Agro-Biotechnology Research Institute, Shanghai Academy of Agricultural Sciences, 2901 Beidi Rd, Shanghai 201106, PR China
| | - Fujian Zhang
- Shanghai Key Laboratory of Agricultural Genetics and Breeding, Agro-Biotechnology Research Institute, Shanghai Academy of Agricultural Sciences, 2901 Beidi Rd, Shanghai 201106, PR China
| | - Yanman Zhu
- Shanghai Key Laboratory of Agricultural Genetics and Breeding, Agro-Biotechnology Research Institute, Shanghai Academy of Agricultural Sciences, 2901 Beidi Rd, Shanghai 201106, PR China
| | - Younan Huang
- Shanghai Key Laboratory of Agricultural Genetics and Breeding, Agro-Biotechnology Research Institute, Shanghai Academy of Agricultural Sciences, 2901 Beidi Rd, Shanghai 201106, PR China
| | - Rihe Peng
- Shanghai Key Laboratory of Agricultural Genetics and Breeding, Agro-Biotechnology Research Institute, Shanghai Academy of Agricultural Sciences, 2901 Beidi Rd, Shanghai 201106, PR China.
| | - Quanhong Yao
- Shanghai Key Laboratory of Agricultural Genetics and Breeding, Agro-Biotechnology Research Institute, Shanghai Academy of Agricultural Sciences, 2901 Beidi Rd, Shanghai 201106, PR China.
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802
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Mu T, Wu T, Zhou T, Li Z, Ouyang Y, Jiang J, Zhu D, Hou J, Wang Z, Luo Y, Christie P, Wu L. Geographical variation in arsenic, cadmium, and lead of soils and rice in the major rice producing regions of China. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 677:373-381. [PMID: 31059880 DOI: 10.1016/j.scitotenv.2019.04.337] [Citation(s) in RCA: 68] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Revised: 04/13/2019] [Accepted: 04/23/2019] [Indexed: 06/09/2023]
Abstract
Rapid industrialization and urbanization have accelerated the contamination of paddy soils with potentially toxic elements (PTEs). However, the status and the key factors responsible for the geographical variation in PTE concentrations in rice remain poorly understood. Here, a total of 113 pairs of soil and rice plant samples were collected from 19 provinces in four major rice producing areas of China to assess the geographical variation in total arsenic (As), cadmium (Cd) and lead (Pb) concentrations in the soil-rice system. Average total concentrations of As, Cd and Pb were 11.8, 0.45 and 25.7 mg kg-1, respectively, in the soils and 0.089, 0.087 and 0.036 mg kg-1 in the polished rice. The national maximum allowable concentrations of total soil As and Cd were exceeded in 6.19 and 33.6% of soils and that of Cd was exceeded in 7.96% of polished rice and no polished rice exceed the Pb limit. The As, Cd and Pb concentrations of rice were significantly and positively correlated (p < 0.05) with their corresponding soil available concentrations rather than with their soil total concentrations. Due to the combined effects of local rice varieties, cultivation of varieties with high Cd translocation factors and high Cd availability in acid soils, the highest rice Cd risk occurred in south China. The Cd concentrations in polished rice exceeded the maximum allowable by 4.0 and 15.8% in uncontaminated and contaminated soils, respectively. Results from 113 fixed samples may represent the actual current As, Cd and Pb status of rice in the main rice production areas nationally as they were very consistent with 574 random samples. In view of the high Cd contamination risk in acid soils of south China, countermeasures are needed to minimize Cd accumulation in rice crops in this region.
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Affiliation(s)
- Tingting Mu
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China; University of the Chinese Academy of Sciences, Beijing 100049, China
| | - Tuozheng Wu
- College of Resources, Sichuan Agricultural University, Chengdu 611130, China
| | - Tong Zhou
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
| | - Zhu Li
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
| | - Younan Ouyang
- China National Rice Research Institute, Hangzhou 311401, China
| | - Jinping Jiang
- College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, China
| | - Dong Zhu
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
| | - Jinyu Hou
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
| | - Zhaoyang Wang
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
| | - Yongming Luo
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
| | - Peter Christie
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
| | - Longhua Wu
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China.
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803
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Xiong Z, Zhang J, Cai P, Chen W, Huang Q. Bio-organic stabilizing agent shows promising prospect for the stabilization of cadmium in contaminated farmland soil. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:23399-23406. [PMID: 31201703 DOI: 10.1007/s11356-019-05619-8] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2018] [Accepted: 05/28/2019] [Indexed: 06/09/2023]
Abstract
In situ immobilization of cadmium (Cd) has been considered as a cost-effective and non-disruptive remediation technique for Cd-contaminated soils. In this study, several immobilization approaches were compared in a Cd-contaminated agricultural farmland. The soil was treated with different combinations of the immobilizing agents such as biochar (C), rice straw (RS), lime (L), and engineered bacteria P. putida X4/pIME (B). The plant yield and Cd uptake of lettuce as well as soil Cd fractionations were measured. The Cd content in lettuce leaves and roots decreased by 46.8~67.2% and 36.8~60.2%, respectively. Among the five treatments, combined rice straw, lime, and engineered bacteria treatment showed the lowest Cd concentration in lettuce leaves (0.14 mg/kg) and the highest plant yield (21.5 t/ha). The alleviating effects are assigned to the significant transformation of water soluble and exchangeable Cd to humic substance bound, strong organic bound and residual Cd in the soils. This study suggests that this bio-organic stabilizing agent is more cost-effective than some other immobilization agents reported previously, and shows a great application prospect in improving agriculture production of heavy metal-polluted agricultural soils.
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Affiliation(s)
- Zhenqian Xiong
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, 430070, China
- Hubei Key Laboratory of Soil Environment and Pollution Remediation, Huazhong Agricultural University, Wuhan, 430070, China
| | - Junqing Zhang
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, 430070, China
- Hubei Key Laboratory of Soil Environment and Pollution Remediation, Huazhong Agricultural University, Wuhan, 430070, China
| | - Peng Cai
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, 430070, China
- Hubei Key Laboratory of Soil Environment and Pollution Remediation, Huazhong Agricultural University, Wuhan, 430070, China
| | - Wenli Chen
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, 430070, China
| | - Qiaoyun Huang
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, 430070, China.
- Hubei Key Laboratory of Soil Environment and Pollution Remediation, Huazhong Agricultural University, Wuhan, 430070, China.
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804
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Yang B, Cao Y, Ren J, Wang M, Luo H, Li F. Water incubation-induced fluctuating release of heavy metals in two smelter-contaminated soils. J Environ Sci (China) 2019; 82:14-23. [PMID: 31133259 DOI: 10.1016/j.jes.2019.02.026] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2018] [Revised: 02/25/2019] [Accepted: 02/26/2019] [Indexed: 06/09/2023]
Abstract
The soil moisture regime can affect the release of heavy metals in soil. In the previous studies, slightly polluted soils or artificially contaminated soil samples were considered to investigate the effect of soil moisture. We used highly smelter-contaminated and aged soils to study the release of typical heavy metals (Cu, Zn, Cd and Pb) induced by water incubation in batch experiments with characterization via speciation and X-ray diffraction analyses (XRD). The results show that the leachable concentrations of the heavy metals increased slightly in the first 30 days, decreased drastically between 30 and 90 days, and immobilized relatively constant thereafter. The fluctuation was ascribed to the changes of soil Eh and pH, the reductive dissolution of crystalline iron oxides, the formation of new amorphous iron oxides, the absorption of dissolved organic matter and the precipitation of metal sulfide. Speciation analysis indicated that a proportion of the soil heavy metals was transformed from an exchangeable fraction to a less labile fraction after water incubation. And the presence of a lead iron oxide phase and the peak increasing of zinc sulfide were observed via XRD analyses. Finally, water incubation restrained the release of heavy metals after 180 days of incubation, and reduced the leachability of Cu, Zn, Cd and Pb by as much as 1.61%-7.21% for soil A and 0.43%-3.36% for soil B, respectively. The study findings have implications for the formulation of risk control and management strategies for heavy metals in smelter-contaminated soils.
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Affiliation(s)
- Bin Yang
- College of Water Science, Beijing Normal University, Beijing 100875, China.; State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
| | - Yunzhe Cao
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
| | - Jie Ren
- School of Ecology and Environment, Inner Mongolia University, Hohhot 010021, China
| | - Mei Wang
- College of Water Science, Beijing Normal University, Beijing 100875, China.; State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
| | - Huilong Luo
- College of Water Science, Beijing Normal University, Beijing 100875, China.; State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
| | - Fasheng Li
- College of Water Science, Beijing Normal University, Beijing 100875, China.; State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
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805
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Meng X, Wang X, Wang Y. Quantifying correlations of metal ionic characters with ecological soil screening levels (Eco-SSLs) of metals using QICAR models. CHEMOSPHERE 2019; 228:451-459. [PMID: 31051347 DOI: 10.1016/j.chemosphere.2019.04.183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2019] [Revised: 04/23/2019] [Accepted: 04/24/2019] [Indexed: 06/09/2023]
Abstract
Soil pollution by heavy metals is a major challenge for soil ecosystems; therefore, many countries have published thresholds or standards for protecting soil organisms based on toxicity testing. However, there have been few studies on the mechanism of metal toxicity on organisms in soils, especially relationships between metal's ionic properties and its toxicity. Herein, we selected environmental soil screening levels (Eco-SSLs), which are internationally recognized ecotoxicity values recommended by the United States Environmental Protection Agency (USEPA), and investigated relationships between Eco-SSLs and metal ionic characteristics. The results showed that several ionic characteristics were significantly correlated with Eco-SSL using a classification of metal ions according to hard and soft acids and bases. Electrochemical potential, atomic ionization potential, the first hydrolysis constant, the maximum complex stability constant, a polarization force parameter and covalent radius showed significant correlations with Eco-SSLs for borderline plus hard ions, while the soft index exhibited significant fitting for borderline plus soft ions, suggesting that ionic bonding and covalent bonding played important roles in metal toxicity on borderline plus hard ions and soft ions, respectively. Then, we chose characteristics that had the strongest correlations with Eco-SSLs, and developed quantitative ion character-activity relationship (QICAR) for soil organisms. The QICARs predicted Eco-SSLs for metals that were reasonably consistent with those recommended by USEPA, with differences between them generally <0.5 orders of magnitude. Overall, QICAR provide a basis for ecological risk assessment and could be useful to interpret relationships between metal's ionic properties and its toxicity.
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Affiliation(s)
- Xiaoqi Meng
- The Key Lab of Resource Environment and GIS, College of Resource Environment and Tourism, Capital Normal University, Beijing, 100048, China
| | - Xuedong Wang
- The Key Lab of Resource Environment and GIS, College of Resource Environment and Tourism, Capital Normal University, Beijing, 100048, China.
| | - Ying Wang
- School of Space and Environment, Beihang University, Beijing, 100191, China; State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China
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806
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Shi T, Ma J, Zhang Y, Liu C, Hu Y, Gong Y, Wu X, Ju T, Hou H, Zhao L. Status of lead accumulation in agricultural soils across China (1979-2016). ENVIRONMENT INTERNATIONAL 2019; 129:35-41. [PMID: 31108391 DOI: 10.1016/j.envint.2019.05.025] [Citation(s) in RCA: 74] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2019] [Revised: 05/05/2019] [Accepted: 05/09/2019] [Indexed: 06/09/2023]
Abstract
The first national-scale assessment of lead (Pb) contamination in agricultural soils across China was conducted based on >1900 articles published between 1979 and 2016. Pb concentrations, temporal and spatial variations, and influencing factors were analyzed. Children's blood lead levels (BLLs) were also estimated using the integrated exposure uptake biokinetic (IEUBK) model. Pb concentrations in different areas of China varied greatly, which was closely associated with the distribution of Pb-related industries, especially Pb-zinc mine smelting, non-ferrous polymetallic mine smelting, e-waste recycling, and leaded gasoline consumption. The year 2000 was a significant transition year for Pb concentrations, with a rapid increase pre-2000 and a subsequent slow upward trend. Pb concentrations were found to be strongly associated with indicators of economic and social development including gross domestic product (GDP), population size, and vehicle ownership. Leaded gasoline, coal combustion, and non-ferrous smelting were the main sources of atmospheric Pb during the different periods. Predicted BLLs were higher in South China than those in the north. This study details the overall Pb contamination status of agricultural soils in China, and thus provides insights for policymakers with respect to pollution prevention measures.
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Affiliation(s)
- Taoran Shi
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
| | - Jin Ma
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
| | - Yunyun Zhang
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
| | - Chengshuai Liu
- State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China.
| | - Yanbin Hu
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
| | - Yiwei Gong
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
| | - Xiao Wu
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
| | - Tienan Ju
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
| | - Hong Hou
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
| | - Long Zhao
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
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807
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Pan D, Liu C, Yu H, Li F. A paddy field study of arsenic and cadmium pollution control by using iron-modified biochar and silica sol together. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:24979-24987. [PMID: 31243656 DOI: 10.1007/s11356-019-05381-x] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2018] [Accepted: 05/03/2019] [Indexed: 06/09/2023]
Abstract
Under flooded conditions in paddy soil, the mobility of As increases while the mobility of Cd decreases. The opposite geochemical behavior of As and Cd makes it difficult to reduce their mobilities simultaneously. Our recent study found that combined applications of biochar and zero-valent iron successfully reduced the mobilities of As and Cd simultaneously. On this basis, in the present study, an iron-modified biochar (Fe-BC) was developed, and its effect on decreasing the accumulations of As and Cd in rice was verified in a 2-year field trial. In addition, previous studies indicated that silicon fertilizer can also reduce As and Cd accumulation in rice grain. Hence, the effect of the combined or separate application of Fe-BC and silica sol on As and Cd accumulation in rice grain was investigated. Over the 2-year field trial, the grain yields decreased in the following order: iron-modified biochar plus silica sol (Fe-BC plus Si) > silica sol (Si) > Fe-BC > control (CK). Concentrations of As and Cd in brown rice were in the order: Fe-BC plus Si < Si ≈ Fe-BC < CK. The treatments of Fe-BC and Fe-BC plus Si significantly increased the soil pH and thus decreased available As and available Cd in the soil. In addition, significantly positive correlations between available As and As in brown rice and between available Cd and Cd in brown rice were found. In conclusion, co-application of iron-modified biochar and silica sol should be a recommended strategy to reduce the accumulation of As and Cd in rice grains.
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Affiliation(s)
- Dandan Pan
- College of Natural Resources and Environment, South China Agricultural University, Guangzhou, 510642, People's Republic of China
- Guangdong Institute of Eco-Environmental Science and Technology, Guangzhou, 510650, People's Republic of China
| | - Chuanping Liu
- Guangdong Institute of Eco-Environmental Science and Technology, Guangzhou, 510650, People's Republic of China
| | - Huanyu Yu
- Guangdong Institute of Eco-Environmental Science and Technology, Guangzhou, 510650, People's Republic of China
| | - Fangbai Li
- Guangdong Institute of Eco-Environmental Science and Technology, Guangzhou, 510650, People's Republic of China.
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808
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Li Y, Zhang H, Shao L, Zhou X, He P. Impact of municipal solid waste incineration on heavy metals in the surrounding soils by multivariate analysis and lead isotope analysis. J Environ Sci (China) 2019; 82:47-56. [PMID: 31133269 DOI: 10.1016/j.jes.2019.02.020] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2018] [Revised: 02/20/2019] [Accepted: 02/20/2019] [Indexed: 06/09/2023]
Abstract
Municipal solid waste (MSW) incineration has become an important anthropogenic source of heavy metals (HMs) to the environment. However, assessing the impact of MSW incineration on HMs in the environment, especially soils, can be a challenging task because of various HM sources. To investigate the effect of MSW incineration on HMs in soils, soil samples collected at different distances from four MSW incinerators in Shanghai, China were analyzed for their contents of eight HMs (antimony, cadmium, chromium, copper, lead, mercury, nickel, and zinc) and lead (Pb) isotope ratios. Source identification and apportionment of HMs were accomplished using principal component analysis and Pb isotope analysis. Results indicated that the relatively high contents of cadmium, lead, antimony, and zinc in the soils at 250 m and 750-1250 m away from the MSW incinerators were related to MSW incineration, while the elevated contents of the other four HMs were associated with other anthropogenic activities. Based on Pb isotope analysis, the contribution ratio of MSW incineration (which had been operated for more than 14 years) to the accumulation of Pb in soil was approximately 10% on average, which was lower than coal combustion only. Incinerator emissions of Pb could have a measurable effect on the soil contamination within a limited area (≤1500 m).
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Affiliation(s)
- Yang Li
- State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai 200092, China.
| | - Hua Zhang
- State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai 200092, China; Institute of Waste Treatment and Reclamation, Tongji University, Shanghai 200092, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China
| | - Liming Shao
- State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai 200092, China; Institute of Waste Treatment and Reclamation, Tongji University, Shanghai 200092, China; Centre for the Technology Research and Training on Household Waste in Small Towns & Rural Area, Ministry of Housing Urban-Rural Development, Shanghai 200092, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China
| | - Xiaoli Zhou
- State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai 200092, China; Institute of Waste Treatment and Reclamation, Tongji University, Shanghai 200092, China
| | - Pinjing He
- Institute of Waste Treatment and Reclamation, Tongji University, Shanghai 200092, China; Centre for the Technology Research and Training on Household Waste in Small Towns & Rural Area, Ministry of Housing Urban-Rural Development, Shanghai 200092, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China.
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809
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Yan J, Huo J, Li R, Jia Z, Song Y, Chen J, Zhang L. Benchmark dose estimation of urinary and blood cadmium as biomarkers of renal dysfunction among 40‐75‐year‐old non‐smoking women in rural areas of southwest China. J Appl Toxicol 2019; 39:1433-1443. [PMID: 31313336 DOI: 10.1002/jat.3829] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2019] [Revised: 05/03/2019] [Accepted: 05/05/2019] [Indexed: 01/08/2023]
Affiliation(s)
- Jiuming Yan
- West China School of Public Health and West China Fourth Hospital, West China School of Public Health and Healthy Food Evaluation Research Center, Food Safety Monitoring and Risk Assessment Key Laboratory of Sichuan ProvinceSichuan University Chengdu Sichuan China
| | - Jiao Huo
- West China School of Public Health and West China Fourth Hospital, West China School of Public Health and Healthy Food Evaluation Research Center, Food Safety Monitoring and Risk Assessment Key Laboratory of Sichuan ProvinceSichuan University Chengdu Sichuan China
| | - Renjia Li
- West China School of Public Health and West China Fourth Hospital, West China School of Public Health and Healthy Food Evaluation Research Center, Food Safety Monitoring and Risk Assessment Key Laboratory of Sichuan ProvinceSichuan University Chengdu Sichuan China
| | - Zhenchao Jia
- West China School of Public Health and West China Fourth Hospital, West China School of Public Health and Healthy Food Evaluation Research Center, Food Safety Monitoring and Risk Assessment Key Laboratory of Sichuan ProvinceSichuan University Chengdu Sichuan China
| | - Yang Song
- West China School of Public Health and West China Fourth Hospital, West China School of Public Health and Healthy Food Evaluation Research Center, Food Safety Monitoring and Risk Assessment Key Laboratory of Sichuan ProvinceSichuan University Chengdu Sichuan China
| | - Jinyao Chen
- West China School of Public Health and West China Fourth Hospital, West China School of Public Health and Healthy Food Evaluation Research Center, Food Safety Monitoring and Risk Assessment Key Laboratory of Sichuan ProvinceSichuan University Chengdu Sichuan China
| | - Lishi Zhang
- West China School of Public Health and West China Fourth Hospital, West China School of Public Health and Healthy Food Evaluation Research Center, Food Safety Monitoring and Risk Assessment Key Laboratory of Sichuan ProvinceSichuan University Chengdu Sichuan China
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810
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Xia W, Chen L, Deng X, Liang G, Giesy JP, Rao Q, Wen Z, Wu Y, Chen J, Xie P. Spatial and interspecies differences in concentrations of eight trace elements in wild freshwater fishes at different trophic levels from middle and eastern China. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 672:883-892. [PMID: 30978550 DOI: 10.1016/j.scitotenv.2019.03.134] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2019] [Revised: 03/07/2019] [Accepted: 03/09/2019] [Indexed: 06/09/2023]
Abstract
There have been numerous studies on concentrations of trace elements in aquatic ecosystems, but few have been conducted at a large spatial scale. This study collected 410 samples of five wild freshwater fishes at different trophic levels from middle and eastern China. Concentrations of eight trace elements, chromium (Cr), iron (Fe), nickel (Ni), copper (Cu), zinc (Zn), arsenic (As), lead (Pb) and cadmium (Cd) and stable isotope ratios (δ13C and δ15N) were determined in dorsal muscle of fishes. Spatially, concentrations of trace elements were least in fishes from the Hai River Basin, while those in fishes from the Taihu Lake Basin were greatest. The carnivorous topmouth culter and omnivorous common carp and crucian carp accumulated greater amounts of trace elements than did the planktivorous silver carp and bighead carp. Trophic biomagnification was for Cu, Fe and Zn, but not for Cr, Ni, As, Pb and Cd. Concentrations of As in 15 muscle samples (3.7%) from Taihu Lake Basin exceeded the guidelines (1.0 mg/kg, wet mass) provided by FAO/WHO (2014), while the total target hazard quotient (TTHQ) values were <1.0, indicating no obvious non-carcinogenic risks to humans that consume those fishes. However, people who consume larger amounts of fish products, or people who are vulnerable, such as pregnant women, children and people with poor health, might be at greater risk. Also, exposure to trace metals through other routes cannot be ignored. Accumulations of trace elements in Chinese freshwater fishes were affected by both geographical conditions and human activities.
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Affiliation(s)
- Wulai Xia
- Donghu Experimental Station of Lake Ecosystems, State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Liang Chen
- Donghu Experimental Station of Lake Ecosystems, State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; State Key Laboratory of Eco-hydraulics in Northwest Arid Region, Faculty of Water Resources and Hydroelectric Engineering, Xi'an University of Technology, Xi'an 710048, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xuwei Deng
- Donghu Experimental Station of Lake Ecosystems, State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
| | - Gaodao Liang
- Wuhan Centers for Disease Control & Prevention, Wuhan 430015, China
| | - John P Giesy
- Department of Veterinary Biomedical Sciences and Toxicology Centre, University of Saskatchewan, Saskatoon, Saskatchewan S7N5B3, Canada; Department of Environmental Science, Baylor University, Waco, TX, United States
| | - Qingyang Rao
- Donghu Experimental Station of Lake Ecosystems, State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zihao Wen
- Donghu Experimental Station of Lake Ecosystems, State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yao Wu
- Donghu Experimental Station of Lake Ecosystems, State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jun Chen
- Donghu Experimental Station of Lake Ecosystems, State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China.
| | - Ping Xie
- State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining 810016, China.
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811
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Yao A, Ju L, Ling X, Liu C, Wei X, Qiu H, Tang Y, Morel JL, Qiu R, Li C, Wang S. Simultaneous attenuation of phytoaccumulation of Cd and As in soil treated with inorganic and organic amendments. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2019; 250:464-474. [PMID: 31026693 DOI: 10.1016/j.envpol.2019.04.073] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2019] [Revised: 04/14/2019] [Accepted: 04/15/2019] [Indexed: 06/09/2023]
Abstract
A novel FeSiCa rich material (IS), chicken manure (CM) and its biochar were investigated for their efficiency in simultaneous remediation of Cd and As uptake by the vegetable Brassica chinensis L. Wet chemistry analysis and X-ray powder diffraction, scanning electron microscopy/energy dispersive X-ray spectroscopy as well as Fourier transform infrared spectroscopy were used to reveal the mechanisms responsible for Cd and As fixation in the amended soils. The IS treatment performed best in reducing Cd uptake, while the combination of IS and CM was the optimal one for As fixation. The precipitation/co-precipitation (in cadmium silicate/phosphate/phosphate hydroxide, cadmium iron and manganese oxides under alkaline conditions, and calcium/magnesium/ferric arsenates) and specific chemisorption (by amorphous iron/manganese oxides) were proved to be more efficient in simultaneously lowering As and Cd phytoavailability than was organic complexation. These findings demonstrate that FeSiCa and FeSiCaC amendments are highly efficient and promising in-situ remediation systems for safe crop production on soils contaminated with Cd and As.
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Affiliation(s)
- Aijun Yao
- School of Geography and Planning, Sun Yat-sen University, Guangzhou, China
| | - Lin Ju
- School of Geography and Planning, Sun Yat-sen University, Guangzhou, China
| | - Xiaodan Ling
- School of Geography and Planning, Sun Yat-sen University, Guangzhou, China
| | - Chong Liu
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, China
| | - Xiange Wei
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, China
| | - Hao Qiu
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai, China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou, China.
| | - Yetao Tang
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou, China
| | - Jean Louis Morel
- Laboratoire Sols et Environnement INRA-Université de Lorraine, Vandoeuvre-lès-Nancy Cédex, France
| | - Rongliang Qiu
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou, China
| | - Charlie Li
- Department of Environmental Toxicology, University of California, Davis, CA 94516, USA
| | - Shizhong Wang
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou, China
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812
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da Silva EB, Mussoline WA, Wilkie AC, Ma LQ. Anaerobic digestion to reduce biomass and remove arsenic from As-hyperaccumulator Pteris vittata. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2019; 250:23-28. [PMID: 30981932 DOI: 10.1016/j.envpol.2019.03.117] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2019] [Revised: 03/26/2019] [Accepted: 03/28/2019] [Indexed: 06/09/2023]
Abstract
The lack of efficient methods to treat As-rich biomass is a drawback for phytoremediation technology. In this study, we applied anaerobic digestion to reduce biomass and remove As from As-rich Pteris vittata biomass. P. vittata biomass including control (3.1 mg kg-1 As) and As-rich (2665 mg kg-1 As), together with positive and negative controls, was anaerobically digested at 35 °C for 35 d. Arsenic partitioning among gas, liquid and solid phases after anaerobic digestion was determined. Methane index potential assay was used to assess methane yields whereas liquid-displacement method was used to measure methane gas production. After 35 d, As partitioning in the liquid, solid and gas phases was 79, 30 and 1%, respectively. Besides, volatile solid was decreased from 91 to 12-17% total solid, while P. vittata biomass was decreased by 73-83%. Moreover, anaerobic digestion solubilized 76% As from P. vittata biomass, with 90% soluble As at 4.95 mg L-1 being recovered by As-Mg precipitation. Finally, methane production after 35 d was 197-212 LNCH4/kg volatile solid, showing slight As inhibition. Effective As removal from P. vittata biomass prior to disposal can improve the phytoremediation process.
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Affiliation(s)
- Evandro B da Silva
- Soil and Water Sciences Department, University of Florida, Gainesville, FL, 32611, United States; Institute of Environment Remediation and Human Health, South West Forestry University, Yunnan, 650224, China
| | - Wendy A Mussoline
- Soil and Water Sciences Department, University of Florida, Gainesville, FL, 32611, United States
| | - Ann C Wilkie
- Soil and Water Sciences Department, University of Florida, Gainesville, FL, 32611, United States
| | - Lena Q Ma
- Soil and Water Sciences Department, University of Florida, Gainesville, FL, 32611, United States; Institute of Environment Remediation and Human Health, South West Forestry University, Yunnan, 650224, China.
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813
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Bian J, Shi X, Li Q, Zhao M, Wang L, Lee J, Tao M, Wu X. A novel functional role of nickel in sperm motility and eukaryotic cell growth. J Trace Elem Med Biol 2019; 54:142-149. [PMID: 31109604 DOI: 10.1016/j.jtemb.2019.04.017] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Revised: 03/29/2019] [Accepted: 04/24/2019] [Indexed: 12/29/2022]
Abstract
BACKGROUND Metal ions are essential for numerous life processes. This study aims to investigate the relationship between seminal quality and ion levels in seminal plasma. BASIC PROCEDURES A total of 205 semen samples were collected and seminal plasma ion levels were examined with inductively-coupled plasma-mass spectrometry. The nickel function was demonstrated by in vitro assay and cell growth. MAIN FINDINGS The low sperm motility group showed distinctively reduced nickel concentration in seminal plasma compared with the normal sperm motility group. However, arsenic, sulfur, selenium, magnesium and zinc were negatively associated with sperm quality. No significant relationship between other examined cations and semen quality was observed. In vitro assay suggested low concentration of nickel significantly increased sperm total motility and progressive motility. Cell growth assay further confirmed nickel promoted eukaryotic yeast cell growth. Nickel level in seminal plasma may play important functions to determine sperm quality. PRINCIPAL CONCLUSIONS Our study reveals a strong correlation between S, Mg, Se, Zn, As, Ni and seminal quality as well as discovers a novel functional role of nickel in sperm motility and eukaryotic cell growth. These findings may provide a potential avenue for assessment of sperm quality and treatment of reproduction disorders.
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Affiliation(s)
- Jiang Bian
- College of Life Sciences, Shanghai Normal University, Shanghai, 200234, China; Reproductive Medicine Center, Department of Obstetrics and Gynecology, Shanghai Jiaotong University Affiliated Sixth People's Hospital, 200233, Shanghai, China
| | - Xiaohong Shi
- Reproductive Medicine Center, Department of Obstetrics and Gynecology, Shanghai Jiaotong University Affiliated Sixth People's Hospital, 200233, Shanghai, China
| | - Qin Li
- College of Life Sciences, Shanghai Normal University, Shanghai, 200234, China
| | - Miaoyun Zhao
- Department of Biochemistry, University of Nebraska-Lincoln, Lincoln, Nebraska, 68588, USA
| | - Lingyun Wang
- College of Life Sciences, Shanghai Normal University, Shanghai, 200234, China
| | - Jaekwon Lee
- Department of Biochemistry, University of Nebraska-Lincoln, Lincoln, Nebraska, 68588, USA
| | - Minfang Tao
- Reproductive Medicine Center, Department of Obstetrics and Gynecology, Shanghai Jiaotong University Affiliated Sixth People's Hospital, 200233, Shanghai, China.
| | - Xiaobin Wu
- College of Life Sciences, Shanghai Normal University, Shanghai, 200234, China.
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814
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Xu K, Liu YX, Wang XF, Cheng JM. Effect of Nano-Carbon Black Surface Modification on Toxicity to Earthworm (Eisenia fetida) Using Filter Paper Contact and Avoidance Test. BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2019; 103:206-211. [PMID: 30903262 DOI: 10.1007/s00128-019-02572-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2018] [Accepted: 02/11/2019] [Indexed: 05/23/2023]
Abstract
Engineered nanomaterials (NMs) may enter the soil through various channels and pose potential harm to soil animals, especially those proactively applied for soil heavy metal remediation. Effects of nano-carbon black (CB) and surface modified carbon black (MCB) on catalase (CAT) activity and malondialdehyde (MDA) content in earthworms exposed on filter paper for 48 h were tested. Avoidance test was used to determine hazard of soil treated with 0.015% and 1.5% CB and MCB. Surface properties of NMs were also characterized. MCB has a significant effect on CAT activity at 70 and 1000 mg/L (1.1 and 15.7 µg/cm2), but has no impact on MDA content in earthworm. Strongly avoidance behavior of worms was also found in soil added 1.5% MCB. Negative charges and oxygen functional groups increased for MCB and its adverse effect on earthworm was higher than CB. The application of MCB in soil remediation warrants more attention.
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Affiliation(s)
- Kun Xu
- College of Geography and Environment, Shandong Normal University, Jinan, 250358, Shandong, China
| | - Ya-Xin Liu
- College of Geography and Environment, Shandong Normal University, Jinan, 250358, Shandong, China
| | - Xiao-Feng Wang
- College of Geography and Environment, Shandong Normal University, Jinan, 250358, Shandong, China
| | - Jie-Min Cheng
- College of Geography and Environment, Shandong Normal University, Jinan, 250358, Shandong, China.
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815
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Wu C, Wei X, Liu P, Tan J, Liao C, Wang H, Yin L, Zhou W, Cui HJ. Influence of structural Al species on Cd(II) capture by iron muscovite nanoparticles. CHEMOSPHERE 2019; 226:907-914. [PMID: 31509920 DOI: 10.1016/j.chemosphere.2019.04.015] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2018] [Revised: 04/01/2019] [Accepted: 04/03/2019] [Indexed: 06/10/2023]
Abstract
The isomorphous substitution in the structure of phyllosilicate minerals plays an important role in regulating of surface chemical properties. In this work, iron muscovite nanoparticles with various Al species were successfully prepared to explore the structural Fe and Al species on the capture of Cd(II) from solutions. The synthesized nanocrystals have irregular shapes with diameters of 10-50 nm. The incorporation of Al(III) into the iron muscovite nanostructure has slight effect on the species of Fe and the crystal phase of the products. The degree of Al(III) substituting Si(IV) in the tetrahedral sheets of the minerals obviously increased with increasing of Al doping levels. For the samples with low Al doping levels (5% and 10%), the adsorption capacity of the iron muscovite nanoparticles for Cd(II) increased slightly. With increasing of Al doping ratio to 15%, the obtained iron muscovite nanoparticles exhibited a maximal uptake of 41.4 mg g-1 for Cd(II), which is about two times that of the undoped samples (22.8 mg g-1). The solution pH had a slight effect on the Cd (II) capture at a wide pH range from 4 to 8. The adsorption of Cd(II) is very fast and reached a steady state within 5 min. Desorption results showed that the binding strength between Cd(II) and iron muscovite nanoparticles was obviously enhanced by incorporation of Al at a high level. The ion exchange and surface complexation are principal mechanisms in the Cd(II) capture by the iron muscovite nanomaterials with various structural Al species.
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Affiliation(s)
- Cong Wu
- College of Resources and Environment, Hunan Agricultural University, Changsha, 410128, People's Republic of China
| | - Xiaoqing Wei
- College of Resources and Environment, Hunan Agricultural University, Changsha, 410128, People's Republic of China
| | - Pei Liu
- College of Resources and Environment, Hunan Agricultural University, Changsha, 410128, People's Republic of China
| | - Jie Tan
- College of Resources and Environment, Hunan Agricultural University, Changsha, 410128, People's Republic of China
| | - Chaolin Liao
- College of Resources and Environment, Hunan Agricultural University, Changsha, 410128, People's Republic of China
| | - Hongzheng Wang
- College of Resources and Environment, Hunan Agricultural University, Changsha, 410128, People's Republic of China
| | - Lichu Yin
- College of Resources and Environment, Hunan Agricultural University, Changsha, 410128, People's Republic of China
| | - Weijun Zhou
- College of Resources and Environment, Hunan Agricultural University, Changsha, 410128, People's Republic of China
| | - Hao-Jie Cui
- College of Resources and Environment, Hunan Agricultural University, Changsha, 410128, People's Republic of China.
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816
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Yang S, Zhao J, Chang SX, Collins C, Xu J, Liu X. Status assessment and probabilistic health risk modeling of metals accumulation in agriculture soils across China: A synthesis. ENVIRONMENT INTERNATIONAL 2019; 128:165-174. [PMID: 31055203 DOI: 10.1016/j.envint.2019.04.044] [Citation(s) in RCA: 147] [Impact Index Per Article: 29.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2019] [Revised: 03/18/2019] [Accepted: 04/18/2019] [Indexed: 06/09/2023]
Abstract
Heavy metal accumulation in agriculture soils is of particular concern in China, while the status and probabilistic health risks of metal contamination in Chinese agriculture soils have been rarely studied at the national scale. In this study, we compiled a database of heavy metal concentrations in Chinese agriculture soils and selected six heavy metals for pollution assessment and risk screening: arsenic (As), cadmium (Cd), chromium (Cr), nickel (Ni), lead (Pb) and Zinc (Zn). Monte Carlo simulation was employed to assess the probabilistic health risks, the associated uncertainties, as well as variations in toxicity parameters, ingestion rate and body weight. Results indicated that the concentrations of Cd were elevated above their reference standard and Cd had the highest mean geo-accumulation index (Igeo) of 1.79. Moreover, the mean hazard index (HI) through exposure to six heavy metals was 1.85E-01 and 2.87E-02 for children and adults, respectively, with 2.2% of non-cancer risks for children that exceeded the guideline value of 1. In contrast, 95.0% and 90.0% of the total cancer risks (TCR) through exposure to six heavy metals for children and adults, respectively, exceeded the guideline value of 1E-06. Six metals were ranked based on their percent of risk outputs exceeding the guideline values. Arsenic had the high exceedance of both cancer and non-cancer risks, while both Cr and Cd were metals with high concern that had high exceedance of cancer risk. Sensitivity analyses indicated that metal concentrations and ingestion rate of soil were the predominant contributors to total risk variance. Overall, the adverse health risks induced by exposure to heavy metals contaminated farmland were elevated. Results from this study may provide valuable implications for public health professionals and policy-makers to design effective strategy to manage nation-wide farmland and reduce heavy metal exposure.
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Affiliation(s)
- Shiyan Yang
- College of Environmental Natural Resource Sciences, Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Zhejiang University, Hangzhou 310058, China
| | - Jian Zhao
- College of Environmental Natural Resource Sciences, Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Zhejiang University, Hangzhou 310058, China
| | - Scott X Chang
- Department of Renewable Resources, University of Alberta, Edmonton, Alberta T6G 2E3, Canada
| | - Chris Collins
- Department of Geography and Environmental Science, University of Reading, Whiteknights Campus, Reading RG6 6DW, UK
| | - Jianming Xu
- College of Environmental Natural Resource Sciences, Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Zhejiang University, Hangzhou 310058, China
| | - Xingmei Liu
- College of Environmental Natural Resource Sciences, Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Zhejiang University, Hangzhou 310058, China.
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817
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Ren XM, Guo SJ, Tian W, Chen Y, Han H, Chen E, Li BL, Li YY, Chen ZJ. Effects of Plant Growth-Promoting Bacteria (PGPB) Inoculation on the Growth, Antioxidant Activity, Cu Uptake, and Bacterial Community Structure of Rape ( Brassica napus L.) Grown in Cu-Contaminated Agricultural Soil. Front Microbiol 2019; 10:1455. [PMID: 31316489 PMCID: PMC6610483 DOI: 10.3389/fmicb.2019.01455] [Citation(s) in RCA: 57] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2019] [Accepted: 06/11/2019] [Indexed: 11/13/2022] Open
Abstract
Previous analyses of plant growth-promoting bacteria (PGPB) combined with the remediation of heavy metal pollution in soil have largely been performed under potting or greenhouse conditions, and in situ remediation experiments under field conditions have rarely been reported. In this study, the effects of the metal-resistant PGPB Microbacterium oxydans JYC17, Pseudomonas thivervalensis Y1-3-9, and Burkholderia cepacia J62 on soil Cu pollution under rape remediation were studied in the farmland surrounding the Nanjing Jiuhuashan copper mining region in China. Following inoculation treatment for 50 days, the biomasses of the rape inoculated with strains JYC17, Y1-3-9, and J62 increased, and the total amounts of Cu uptake increased by 113.38, 66.26, and 67.91%, respectively, the translocation factor (TF) of rape inoculated with J62 was 0.85, a significant increase of 70.68%, thus improving the Cu remediation efficiency of the rape. Y1-3-9 and J62 affected the bioavailability of Cu in the soil, and the water-soluble Cu contents were increased by 10.13 and 41.77%, respectively, compared with the control. The antioxidant activities in the rape leaves showed that the tested bacteria increased the contents of antioxidant non-enzymatic substances, including ascorbic acid (ASA) and glutathione (GSH), which were increased by 40.24-91.22% and 9.89-17.67%, respectively, thereby reducing the oxidative stress caused by heavy metals and the contents of thiobarbituric acid-reactive substances (TBARS) and peroxidase (POD). PCR-denaturing gradient gel electrophoresis (PCR-DGGE) was used to analyze the effects of the tested bacteria on the cultivation-dependent and cultivation-independent bacterial communities in the root endosphere and rhizosphere soil of the rape. The sequencing results of the DGGE bands indicated that the tested bacteria colonized the endosphere and rhizosphere, and they became an important component of the cultivation-dependent bacteria. The canonical correspondence analysis (CCA) of the DGGE profile and similarity cluster analysis showed that the tested bacteria affected the cultivation-dependent and cultivation-independent bacterial communities in the root endosphere and rhizosphere. In this experiment, the effects and mechanisms of the combined plant-microbe remediation under field conditions were preliminarily studied, and the results are expected to provide a theoretical basis for future combined remediation experiments.
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Affiliation(s)
- Xue-Min Ren
- Innovation Center of Water Security for Water Source Region of Mid-Route Project of South-North Water Diversion of Henan Province, School of Agricultural Engineering, Nanyang Normal University, Nanyang, China
| | - Shi-Jun Guo
- School of Life Sciences and Technology, Nanyang Normal University, Nanyang, China
| | - Wei Tian
- Nanjing Institute of Environmental Sciences, Ministry of Environmental Protection, Nanjing, China
| | - Yan Chen
- School of Life Sciences and Technology, Nanyang Normal University, Nanyang, China
| | - Hui Han
- Innovation Center of Water Security for Water Source Region of Mid-Route Project of South-North Water Diversion of Henan Province, School of Agricultural Engineering, Nanyang Normal University, Nanyang, China
| | - E. Chen
- Gansu Province Environmental Monitoring Centre, Lanzhou, China
| | - Bai-Lian Li
- Innovation Center of Water Security for Water Source Region of Mid-Route Project of South-North Water Diversion of Henan Province, School of Agricultural Engineering, Nanyang Normal University, Nanyang, China
- Ecological Complexity and Modelling Laboratory, Department of Botany and Plant Sciences, University of California, Riverside, Riverside, CA, United States
| | - Yu-Ying Li
- Innovation Center of Water Security for Water Source Region of Mid-Route Project of South-North Water Diversion of Henan Province, School of Agricultural Engineering, Nanyang Normal University, Nanyang, China
| | - Zhao-Jin Chen
- Innovation Center of Water Security for Water Source Region of Mid-Route Project of South-North Water Diversion of Henan Province, School of Agricultural Engineering, Nanyang Normal University, Nanyang, China
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818
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Farooq MU, Tang Z, Zheng T, Asghar MA, Zeng R, Su Y, Ei HH, Liang Y, Zhang Y, Ye X, Jia X, Zhu J. Cross-Talk between Cadmium and Selenium at Elevated Cadmium Stress Determines the Fate of Selenium Uptake in Rice. Biomolecules 2019; 9:E247. [PMID: 31238551 PMCID: PMC6627080 DOI: 10.3390/biom9060247] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2019] [Revised: 06/20/2019] [Accepted: 06/22/2019] [Indexed: 12/04/2022] Open
Abstract
Cadmium (Cd) is a well-known metal imposing threats to human health, and it can be accumulated in polished rice over the permitted range of 0.2 mg kg-1 (GB 2762-2017). It has been reported that selenium (Se) application decreases Cd uptake. Se-rich diets have gained attention recently, but the potential of Se-rich rice in mitigating Cd stress needs further investigation. In this study, a pot experiment in the field was conducted to assess the influence of environmental factors and exogenous split application of Se on the nutritional status of rice under Cd stress. The results indicated that the increased fertilizer treatment in soil bulk linearly increased the metal content in rice grains. Approximately 50-70% of metal was recovered in rice tissues, while 5-20% of the metal that was applied leached down into the soil. A Se concentration of 0.4 mg kg-1 could significantly improve the total Se content in grain and mitigate Cd toxicity (1 mg kg-1) below the permitted range. Panicles and roots were more active for total Se accumulation in Se-rich and non-Se-rich rice, respectively. Polishing and milling operations can significantly reduce the Cd content, as rice bran in rice tissues accumulated most of the metal's residues. The late matured rice cultivars consumed more heat units, and more metal contents were found in them. Collectively, it was found that Se can mitigate Cd toxicity, but the rice cultivation at T2 (high Cd; 2 mg kg-1 and Se; 1 mg kg-1) increased the metal uptake capability and health-risk index in polished rice, with its Se content heightened over permitted range of 0.04 to 0.30 mg kg-1 (GB/T 22499-2008). However, further molecular studies are required, in order to completely access the inverted Se accumulation behavior in rice tissues at high Cd soil stress.
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Affiliation(s)
- Muhammad Umer Farooq
- Demonstration Base for International Science & Technology Cooperation of Sichuan Province, Rice Research Institute, Sichuan Agricultural University, Chengdu 611130, Sichuan, China.
| | - Zhichen Tang
- Demonstration Base for International Science & Technology Cooperation of Sichuan Province, Rice Research Institute, Sichuan Agricultural University, Chengdu 611130, Sichuan, China.
| | - Tengda Zheng
- Demonstration Base for International Science & Technology Cooperation of Sichuan Province, Rice Research Institute, Sichuan Agricultural University, Chengdu 611130, Sichuan, China.
| | - Muhammad Ahsan Asghar
- College of Agronomy, Sichuan Agricultural University, Chengdu 611130, Sichuan, China.
| | - Rui Zeng
- Demonstration Base for International Science & Technology Cooperation of Sichuan Province, Rice Research Institute, Sichuan Agricultural University, Chengdu 611130, Sichuan, China.
- Dujiangyan Agricultural and Rural Bureau, Dujiangyan 611830, Sichuan, China.
| | - Yang Su
- Demonstration Base for International Science & Technology Cooperation of Sichuan Province, Rice Research Institute, Sichuan Agricultural University, Chengdu 611130, Sichuan, China.
| | - Hla Hla Ei
- Demonstration Base for International Science & Technology Cooperation of Sichuan Province, Rice Research Institute, Sichuan Agricultural University, Chengdu 611130, Sichuan, China.
| | - Yuanke Liang
- Demonstration Base for International Science & Technology Cooperation of Sichuan Province, Rice Research Institute, Sichuan Agricultural University, Chengdu 611130, Sichuan, China.
| | - Yujie Zhang
- Demonstration Base for International Science & Technology Cooperation of Sichuan Province, Rice Research Institute, Sichuan Agricultural University, Chengdu 611130, Sichuan, China.
| | - Xiaoying Ye
- Demonstration Base for International Science & Technology Cooperation of Sichuan Province, Rice Research Institute, Sichuan Agricultural University, Chengdu 611130, Sichuan, China.
| | - Xiaomei Jia
- Demonstration Base for International Science & Technology Cooperation of Sichuan Province, Rice Research Institute, Sichuan Agricultural University, Chengdu 611130, Sichuan, China.
| | - Jianqing Zhu
- Demonstration Base for International Science & Technology Cooperation of Sichuan Province, Rice Research Institute, Sichuan Agricultural University, Chengdu 611130, Sichuan, China.
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819
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Wang J, Yi X, Cui J, Chang Y, Yao D, Zhou D, Yang J, Zhou J, Chan A, Wang W, Yin X. Nonlinear effects of increasing nitrogen deposition on rice growth and heavy metal uptake in a red soil ecosystem of southeastern China. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 670:1060-1067. [PMID: 31018421 DOI: 10.1016/j.scitotenv.2019.03.245] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2019] [Revised: 02/26/2019] [Accepted: 03/16/2019] [Indexed: 06/09/2023]
Abstract
With the population growth, urbanization and industrialization, China has become a hotspot of atmospheric deposition nitrogen (ADN), which is a threat to ecosystem and food safety. However, the impacts of increased ADN on rice growth and grain metal content are little studied. Based on previous long-term ADN studies, greenhouse experiment was conducted with four simulated ADN rates of 0, 30, 60 and 90 kg N ha-1 yr-1 (CK, N1, N2 and N3 as δ15N, respectively) to assess rice growth and metal uptake in a red soil ecosystem of southeast China during 2016-2017. Results showed that simulated ADN could promote rice growth and increase yields by 15.68-24.41% (except N2) and accumulations of cadmium (Cd) or copper (Cu) in organs. However, there was no linear relationship between ADN rate and rice growth or Cd or Cu uptake. The 15N-ADN was mainly accumulated in roots (21.31-67.86%) and grains (25.26-49.35%), while Cd and Cu were primarily accumulated in roots (78.86-93.44% and 90.00-96.24%, respectively). 15N-ADN and Cd accumulations in roots were significantly different between the two growing seasons (p < 0.05), implying the accumulative effects of ADN. Data also indicated the synergetic effect between accumulations of 15N-ADN and soil Cd and Cu. This study demonstrated that increasing ADN could potentially enhance Cd or Cu uptake in rice grain and threaten rice grain safety. However, related nonlinear mechanism is still needed to be discussed between increasing ADN and rice response in the future.
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Affiliation(s)
- Jingjing Wang
- School of Environmental Science and Engineering, Chang'an University, Xi'an 710054, PR China; Key Laboratory of Soil Environment and Pollution Remediation, Nanjing Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, PR China
| | - Xiu Yi
- School of Environmental Science and Engineering, Chang'an University, Xi'an 710054, PR China
| | - Jian Cui
- Key Laboratory of Soil Environment and Pollution Remediation, Nanjing Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, PR China; Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing Botanical Garden, Mem. Sun Yat-Sen, Nanjing 210014, PR China.
| | - Yajun Chang
- Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing Botanical Garden, Mem. Sun Yat-Sen, Nanjing 210014, PR China
| | - Dongrui Yao
- Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing Botanical Garden, Mem. Sun Yat-Sen, Nanjing 210014, PR China
| | - Dongmei Zhou
- Key Laboratory of Soil Environment and Pollution Remediation, Nanjing Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, PR China
| | - John Yang
- Department of Agriculture and Environmental Science, Lincoln University of Missouri, Jefferson City, MO 65201, USA
| | - Jing Zhou
- Key Laboratory of Soil Environment and Pollution Remediation, Nanjing Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, PR China.
| | - Andy Chan
- Faculty of Engineering, University of Nottingham Malaysia, Semenyih 43500, Malaysia
| | - Wei Wang
- Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing Botanical Garden, Mem. Sun Yat-Sen, Nanjing 210014, PR China
| | - Xijie Yin
- Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005, PR China
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820
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Feng W, Guo Z, Peng C, Xiao X, Shi L, Zeng P, Ran H, Xue Q. Atmospheric bulk deposition of heavy metal(loid)s in central south China: Fluxes, influencing factors and implication for paddy soils. JOURNAL OF HAZARDOUS MATERIALS 2019; 371:634-642. [PMID: 30889460 DOI: 10.1016/j.jhazmat.2019.02.090] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2018] [Revised: 01/30/2019] [Accepted: 02/25/2019] [Indexed: 05/09/2023]
Abstract
The depositions of heavy metal(loid)s (HMs) were measured in an urban agglomeration of China to investigate the fluxes, influencing factors, sources, and potential effects of these HMs. Our results showed that the deposition fluxes of As and Cd were higher in this area than in other regions. In the area, 59.63% of the total deposition fluxes of the Cr, Cu, Ni, Pb and Zn were observed in the wet season (March to July). Lower total fluxes of HMs were observed at the rural site. Principal component analysis (PCA) results showed that the As, Cd, Pb, and Zn might originate from the same anthropogenic sources, including traffic and industrial sources, and that the Cr, Cu, and Ni might come from natural sources. Correlation analysis and redundancy analysis (RDA) showed that rainfall, wind speed, and PMs were critical factors influencing the atmospheric bulk deposition of HMs. For the paddy soil, the input fluxes of HMs by deposition, accounted for 38.66-84.57% (except for Cr) of the total input fluxes. The prediction indicated that the accumulation of HMs in surface soil will notably increase over the next decades due to the influence of atmospheric deposition.
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Affiliation(s)
- Wenli Feng
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China
| | - Zhaohui Guo
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China.
| | - Chi Peng
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China
| | - Xiyuan Xiao
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China
| | - Lei Shi
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China
| | - Peng Zeng
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China
| | - Hongzhen Ran
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China
| | - Qinghua Xue
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China
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821
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Liu S, Ali S, Yang R, Tao J, Ren B. A newly discovered Cd-hyperaccumulator Lantana camara L. JOURNAL OF HAZARDOUS MATERIALS 2019; 371:233-242. [PMID: 30852275 DOI: 10.1016/j.jhazmat.2019.03.016] [Citation(s) in RCA: 76] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Revised: 01/28/2019] [Accepted: 03/04/2019] [Indexed: 05/22/2023]
Abstract
The identification of hyperaccumulators is a key step for the phytoextraction of contaminated soils. However, few cadmium (Cd) hyperaccumulators have been identified in the plant kingdom. In our previous field investigations, Lantana camara L. plants exhibited some traits of hyperaccumulators. To confirm whether this species is a Cd hyperaccumulator, laboratory dose-gradient experiments and field sample analysis experiments were first designed and implemented in an integrated manner. The results showed that lantana plants did not exhibit any visible damage or marked reduction in shoot biomass when grown in Cd-contaminated soil with less than 100 mg kg-1 Cd. Moreover, the lantana plants exhibited high Cd tolerance with effective coordination of photosynthesis and rapid reactive oxygen species scavenging. Most importantly, the bioaccumulation factors (BFs) and translocation factors (TFs) were greater than 1.0 in all the Cd treatments, while the Cd concentrations in the shoots were all greater than those in the roots and were also greater than 100 mg kg-1, the threshold value for a Cd hyperaccumulator. Our data provide comprehensive evidence that lantana plants have the typical characteristics of a Cd hyperaccumulator and thus can be regarded as potential Cd-hyperaccumulating plants for the restoration of Cd-polluted soils.
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Affiliation(s)
- Shiliang Liu
- College of Landscape Architecture, Sichuan Agricultural University, Wenjiang, Chengdu, Sichuan, 611130, China.
| | - Shafaqat Ali
- Department of Environmental Sciences and Engineering, Government College University, Faisalabad, 38000, Pakistan
| | - Rongjie Yang
- College of Landscape Architecture, Sichuan Agricultural University, Wenjiang, Chengdu, Sichuan, 611130, China
| | - Jianjun Tao
- College of Architecture and Urban & Rural Planning, Sichuan Agricultural University, Dujiangyan, Chengdu, Sichuan, 611830, China
| | - Bo Ren
- Institute of Biotechnology and Fine Variety Research, Sichuan Academy of Forestry, Chengdu, Sichuan, 610081, China
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822
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Wang Y, Yi B, Sun X, Yu L, Wu L, Liu W, Wang D, Li Y, Jia R, Yu H, Li X. Removal and tolerance mechanism of Pb by a filamentous fungus: A case study. CHEMOSPHERE 2019; 225:200-208. [PMID: 30875503 DOI: 10.1016/j.chemosphere.2019.03.027] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2018] [Revised: 02/28/2019] [Accepted: 03/05/2019] [Indexed: 06/09/2023]
Abstract
Currently, Pb pollution has become a severe environmental problem and filamentous fungi hold a promising potential for the treatment of Pb-containing wastewater. The present study showed that the strain Pleurotus ostreatus ISS-1 had a strong ability to tolerate Pb at high concentration and reached a removal rate of 53.7% in liquid media. Pb was removed by extracellular biosorption, intracellular bioaccumulation by mycelia, or precipitation with extracellular oxalic acids. On the cellular level, Pb was mainly distributed in the cell wall, followed by vacuoles and organelles. Fourier transform infrared spectroscopy (FTIR) analysis indicated that hydroxyl, amides, carboxyl, and sulfhydryl groups provided binding sites for Pb. Furthermore, Pb was found on the cell surface in the form of PbS and PbCO3 through X-ray diffraction (XRD). Intracellular chelates such as thiol compounds and oxalic acid, as well as extracellular oxalic acid, might play an important role in the tolerance of Pb. In addition, isobaric tags for relative and absolute quantitation (iTRAQ) analysis showed that ATP-binding cassette (ABC) transporter, cytochrome P450, peroxisome, and the calcium signaling pathway might participate in both accumulation and detoxification of Pb. These results have successfully provided a basis for further developing Pb polluted water treatment technology by fungi.
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Affiliation(s)
- Youjing Wang
- College of Life Science, Henan Agricultural University, Zhengzhou, 450002, China
| | - Baizhu Yi
- College of Forestry, Henan Agricultural University, Zhengzhou, 450002, China
| | - Xiaowei Sun
- Henan Academy of Forestry, Zhengzhou, 450008, China
| | - Lei Yu
- Henan Academy of Forestry, Zhengzhou, 450008, China
| | - Longhua Wu
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China
| | - Wuxing Liu
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China
| | - Daichang Wang
- College of Resources and Environment, Henan Agricultural University, Zhengzhou, 450002, China
| | - Yilun Li
- College of Forestry, Henan Agricultural University, Zhengzhou, 450002, China
| | - Rui Jia
- College of Life Science, Henan Agricultural University, Zhengzhou, 450002, China
| | - Hao Yu
- College of Forestry, Henan Agricultural University, Zhengzhou, 450002, China
| | - Xuanzhen Li
- College of Forestry, Henan Agricultural University, Zhengzhou, 450002, China.
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823
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Li Z, Huang M, Luo N, Wen J, Deng C, Yang R. Spectroscopic study of the effects of dissolved organic matter compositional changes on availability of cadmium in paddy soil under different water management practices. CHEMOSPHERE 2019; 225:414-423. [PMID: 30884303 DOI: 10.1016/j.chemosphere.2019.03.059] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2018] [Revised: 02/24/2019] [Accepted: 03/10/2019] [Indexed: 06/09/2023]
Abstract
It is well established that water management can influence the availability of Cd in paddy soil but the role of dissolved organic matter (DOM) characteristics in this process is still unclear. Here, we measured and compared the DOM quantity and quality between flooded and wetted treatments by spectroscopic and chemometric analysis and applied correlation analysis to relate DOM characteristics with availability concentrations of Cd. Ultraviolet-visible showed that aromaticity and hydrophobicity of DOM significantly decreased with time in wetted paddy soil (p < 0.05) but had no significant difference in flooded paddy soil (p > 0.05). According the results from two-dimensional correlation spectroscopy analytical method, humic- and protein-like substances had fast response during cultivation process. Two humic-like substances (C1, C2) and two protein-like substances (C3, C4) were identified from paddy soil-derived DOM by combining emission and excitation matrix spectroscopy with parallel factor. Compared to component C1, C3, and C4, component C2 has stronger aromaticity and hydrophobicity and higher molecular size (665-1000 Da). Its proportion declined markedly during the wetting periods but increased slightly during flooding. Pearson correlation analysis illustrated that flooding was more helpful in immobilizing Cd than wetting due to the aromatic, hydrophobic, and high molecular weight constituents remained in flooded treatments and the substantial decomposition of component C2 in wetted treatments. These results suggested that spectroscopic and chemometric methods are helping to further explain the impacts of DOM quality on Cd availability under different water management practices.
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Affiliation(s)
- Zhongwu Li
- College of Resource and Environment Science, Hunan Normal University, Changsha, 410081, PR China; College of Environmental Science and Engineering, Hunan University, Changsha, 410082, PR China.
| | - Mei Huang
- College of Resource and Environment Science, Hunan Normal University, Changsha, 410081, PR China; College of Environmental Science and Engineering, Hunan University, Changsha, 410082, PR China
| | - Ninglin Luo
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, PR China
| | - Jiajun Wen
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, PR China
| | - Chuxiong Deng
- College of Resource and Environment Science, Hunan Normal University, Changsha, 410081, PR China
| | - Ren Yang
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, PR China
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824
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Shi GL, Li DJ, Wang YF, Liu CH, Hu ZB, Lou LQ, Rengel Z, Cai QS. Accumulation and distribution of arsenic and cadmium in winter wheat (Triticum aestivum L.) at different developmental stages. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 667:532-539. [PMID: 30833251 DOI: 10.1016/j.scitotenv.2019.02.394] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Revised: 02/25/2019] [Accepted: 02/25/2019] [Indexed: 06/09/2023]
Abstract
Arsenic (As) and cadmium (Cd) are known to be toxic to humans, and elevated concentrations have been documented in food crops worldwide. However, little is known regarding their uptake, translocation, and distribution in wheat plants during plant development. A series of experiments were conducted to investigate the spatial distribution and dynamics of As and Cd in two wheat cultivars (cv. JN12 and JM85; the latter is a low grain Cd accumulator) at different developmental stages. Root concentrations of As decreased by 84%, and those of Cd by 67%, from tillering to maturity. In contrast, As concentrations in the stems increased 3.1-fold. A significant decrease in root As accumulation was observed at the mature stage, whereas root Cd accumulation decreased largely at the elongation stage. The concentrations of Cd in all leaves and As in new leaves increased as plant growth advanced. However, As concentrations in old leaves decreased significantly from grain filling to maturity. In both cultivars, the upward transfer toward younger parts of shoots was greater in the case of Cd than of As. The remobilization of As and Cd from stems and roots differed between the two cultivars. Arsenic concentrations in rachis, glumes, and grain in JM85 were significantly higher than those in JN12, whereas As concentrations in roots and stems did not differ between the cultivars. Grain Cd was significantly higher in JN12 than in JM85, but Cd concentrations in rachis and glumes were similar between the cultivars. The difference in grain Cd concentration between the two cultivars depended on root and stem Cd remobilization and redistribution from rachis to glumes and grain; in contrast, accumulation of As in grain was influenced by As remobilization from the leaves and stem to the spike.
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Affiliation(s)
- Gao Ling Shi
- College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, PR China; Provincial Key Laboratory of Agrobiology, Institute of Food Crops, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, PR China; The UWA Institute of Agriculture, and UWA School of Agriculture and Environment, The University of Western Australia, Perth, WA 6009, Australia
| | - Dao Jun Li
- College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Yu Feng Wang
- College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Chang Hao Liu
- College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Zhu Bing Hu
- College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, PR China; Institute of Plant Stress Biology, State Key Laboratory of Cotton Biology, Department of Biology, Henan University, Kaifeng 475001, PR China
| | - Lai Qing Lou
- College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, PR China.
| | - Zed Rengel
- The UWA Institute of Agriculture, and UWA School of Agriculture and Environment, The University of Western Australia, Perth, WA 6009, Australia
| | - Qing Sheng Cai
- College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, PR China
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825
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Tang L, Deng S, Tan D, Long J, Lei M. Heavy metal distribution, translocation, and human health risk assessment in the soil-rice system around Dongting Lake area, China. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:17655-17665. [PMID: 31028622 DOI: 10.1007/s11356-019-05134-w] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2018] [Accepted: 04/08/2019] [Indexed: 05/22/2023]
Abstract
Heavy metals including copper (Cu), zinc (Zn), cadmium (Cd), chromium (Cr), lead (Pb), and arsenic (As) were investigated in 89 pairs of rice plant and paddy soils around Dongting Lake area, China. Rice plants and soils were collected with GPS device, and heavy metal contents in different rice plant tissues and soils were measured. The aim of the present study was to assess the heavy metal pollution and translocation in the whole soil-rice system, including the consequent human health risk for residents. According to the indices of average geoaccumulation (Igeo) of the studied elements, paddy soils in study area were moderately polluted by Cd, lowly polluted by Pb, and not polluted by Cu, Zn, Cr, and As. Considering the much higher concentrations of studied elements in roots than in other tissues of rice plants, a great mass of these elements was assumed to be confined in the roots. The low translocation factors from root to shoot (Tfroot-shoot) of all the studied heavy metals (0.04-0.74) underpinned this. The high translocation factors from soil to root (Tfsoil-root) of Cd (9.12), As (4.38), and Zn (2.05) indicated the high bioavailability of these heavy metals for rice plant. The health risk assessment using target hazard quotients (THQs) model indicated that Cd (5.17 for adults and 4.49 for children respectively) and As (3.61 for adults and 3.14 for children respectively) could cause human health risk both for adults and children. Further, given the rate of individual THQ values exceeding one, Cu might also be considered as a potential human health dangerous element in the study area. It was worth noting that as one of the main pollutants, Pb did not show human health risk through rice grain consumption due to its low Tf values in soil-rice system. However, the risk identification of As using comparisons of measured concentrations with risk screening value in Chinese paddy soil standard (GB15618-2018) was not consistent with the human health risk assessment result. This might indicate that site-specific risk screening values of As in China is in demand.
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Affiliation(s)
- Lin Tang
- College of Resource and Environment, Hunan Agricultural University, Changsha, 410128, Hunan, People's Republic of China
| | - Sihan Deng
- College of Resource and Environment, Hunan Agricultural University, Changsha, 410128, Hunan, People's Republic of China
| | - Di Tan
- College of Resource and Environment, Hunan Agricultural University, Changsha, 410128, Hunan, People's Republic of China
| | - Jiumei Long
- College of Resource and Environment, Hunan Agricultural University, Changsha, 410128, Hunan, People's Republic of China.
- College of Life Sciences and Environment, Hengyang Normal University, Hengyang, 421008, Hunan, People's Republic of China.
| | - Ming Lei
- College of Resource and Environment, Hunan Agricultural University, Changsha, 410128, Hunan, People's Republic of China.
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826
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Wang P, Chen H, Kopittke PM, Zhao FJ. Cadmium contamination in agricultural soils of China and the impact on food safety. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2019; 249:1038-1048. [PMID: 31146310 DOI: 10.1016/j.envpol.2019.03.063] [Citation(s) in RCA: 308] [Impact Index Per Article: 61.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Revised: 03/15/2019] [Accepted: 03/16/2019] [Indexed: 05/20/2023]
Abstract
Rapid industrialization in China during the last three decades has resulted in widespread contamination of Cd in agricultural soils. A considerable proportion of the rice grain grown in some areas of southern China has Cd concentrations exceeding the Chinese food limit, raising widespread concern regarding food safety. In this review, we summarize rice grain Cd concentrations in national Chinese markets and in field surveys from contaminated areas, and analyze the potential health risk associated with increased dietary Cd intake. For subsistence rice farmers living in some contaminated areas of southern China who mainly consume locally-produced Cd-contaminated rice, their estimated dietary Cd intake is now comparable to that for the population in the region of Japan where the Itai-Itai disease was first reported. Interventions must be taken urgently to reduce Cd intake for these farmers. We also analyze i) the main reasons causing elevated grain Cd concentrations in southern China, ii) the dominant biogeochemical processes controlling the solubility of Cd in paddy soils, and iii) molecular mechanisms for the uptake and translocation of Cd in rice plants. Based on these analyses, we propose a number of countermeasures to address soil Cd contamination, including i) mitigation of Cd transfer from paddy soils to rice grain, and ii) intervention in those farmers who consume home-grown Cd-contaminated rice. Liming to increase soil pH to 6.5 and gene editing biotechnology are effective strategies to decrease Cd accumulation in rice grain. For these local farmers with high-Cd exposure risk, local governments should monitor the Cd concentration in their home-grown rice and exchange those high-Cd rice with low-Cd rice in order to reduce their dietary Cd intake.
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Affiliation(s)
- Peng Wang
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, China.
| | - Hongping Chen
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Peter M Kopittke
- School of Agriculture and Food Sciences, The University of Queensland, St Lucia, Queensland, 4072, Australia
| | - Fang-Jie Zhao
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, China
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827
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da Silva EB, Mussoline WA, Wilkie AC, Ma LQ. Arsenic removal and biomass reduction of As-hyperaccumulator Pteris vittata: Coupling ethanol extraction with anaerobic digestion. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 666:205-211. [PMID: 30798231 DOI: 10.1016/j.scitotenv.2019.02.161] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2018] [Revised: 02/10/2019] [Accepted: 02/10/2019] [Indexed: 06/09/2023]
Abstract
Improper disposal of arsenic-rich biomass and the lack of efficient methods to treat it may cause contamination in the environment. We developed an efficient method for arsenic (As) removal and biomass reduction of As-rich biomass of the As-hyperaccumulator Pteris vittata by coupling ethanol extraction with anaerobic digestion. This study assessed As partitioning among the three phases (gas, liquid and solid) after anaerobic digestion of P. vittata biomass. Biomass with and without As was first extracted with ethanol. Ethanol extraction removed ~93% As, with remaining As concentration at 197 mg kg-1. The extracted biomass was then digested at 35 °C under anaerobic conditions for 35 d. Arsenic in the digested biomass was reduced by 89%, with remaining As concentration at 60 mg kg-1. In addition, anaerobic digestion reduced the biomass by 64-71% and decreased the volatile solids content from 94 to 15-18%. Methane production was 145 and 160 LNCH4/kgVS after 35 d for As-rich and control biomass, respectively. As a final step, As concentration in anaerobic digestate supernatant was reduced to 0.26 mg L-1 by As-Mg precipitation. Overall, coupling ethanol extraction with anaerobic digestion decreased As concentration in P. vittata biomass from 2665 to 60 mg kg-1, or by 98%. At this level (<100 mg As kg-1), P. vittata biomass can be considered a safe material based on USEPA regulations. Effective As removal from P. vittata biomass prior to disposal improves the phytoremediation process and lowers biomass transport and landfill disposal costs.
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Affiliation(s)
- Evandro B da Silva
- Soil and Water Sciences Department, University of Florida-IFAS, Gainesville, FL 32611, United States
| | - Wendy A Mussoline
- Soil and Water Sciences Department, University of Florida-IFAS, Gainesville, FL 32611, United States
| | - Ann C Wilkie
- Soil and Water Sciences Department, University of Florida-IFAS, Gainesville, FL 32611, United States.
| | - Lena Q Ma
- Soil and Water Sciences Department, University of Florida-IFAS, Gainesville, FL 32611, United States; Research Center for Soil Contamination and Environment Remediation, Southwest Forestry University, Yunnan 650224, China
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828
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Liu B, Mo CH, Zhang Y. Using cadmium bioavailability to simultaneously predict its accumulation in crop grains and the bioaccessibility in soils. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 665:246-252. [PMID: 30772555 DOI: 10.1016/j.scitotenv.2019.01.427] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Revised: 01/28/2019] [Accepted: 01/31/2019] [Indexed: 06/09/2023]
Abstract
Single extraction procedures (SEPs) have been extensively conducted to determine Cd bioavailability (Cd-Bav) in soils. However, whether SEPs can simultaneously predict Cd accumulation in crop grains and bioaccessibility (Cd-Bac) in soils remains unclear. To assess their suitability, the Cd-Bav in 20 contaminated soils (containing 0.27-56.59 mg/kg Cd) determined by four SEPs (including DTPA, EDTA, HOAc and HCl) was compared with Cd concentrations in crop grains (wheat and rice) and Cd-Bac in soils (based on SBET and PBET assays). The results indicated that both Cd-Bav (0-103.2%) and Cd-Bac (0-110.4%) in soils varied greatly with the methods used. The Cd-Bav obtained from chelators (DTPA and EDTA) was generally greater in low-Cd soils but lower in high-Cd soils as compared to those obtained from acid solutions (HOAc and HCl). Regression analysis revealed that bioavailable Cd concentrations in soils were linearly correlated with Cd concentrations in wheat grains (R2 = 0.88-0.91); however, no significant correlation was found for rice grains. The Cd-Bac in soils was significantly correlated with Cd-Bav obtained from HOAc (R2 = 0.55-0.59) or HCl (R2 = 0.60-0.68), but not with those obtained from chelators (DTPA and EDTA). Our data suggest that SEPs, particularly the HCl method, have great potential to simultaneously predict Cd accumulation in wheat grains and Cd-Bac in contaminated soils.
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Affiliation(s)
- Bailin Liu
- Guangdong Provincial Research Center for Environment Pollution Control and Remediation Materials, College of Life Science and Technology, Jinan University, Guangzhou 510632, China; Gansu Key Laboratory of Biomonitoring and Bioremediation for Environmental Pollution, School of Life Sciences, Lanzhou University, Lanzhou 730000, China
| | - Ce-Hui Mo
- Guangdong Provincial Research Center for Environment Pollution Control and Remediation Materials, College of Life Science and Technology, Jinan University, Guangzhou 510632, China.
| | - Yingmei Zhang
- Gansu Key Laboratory of Biomonitoring and Bioremediation for Environmental Pollution, School of Life Sciences, Lanzhou University, Lanzhou 730000, China.
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829
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Sui F, Zhao D, Zhu H, Gong Y, Tang Z, Huang XY, Zhang G, Zhao FJ. Map-based cloning of a new total loss-of-function allele of OsHMA3 causes high cadmium accumulation in rice grain. JOURNAL OF EXPERIMENTAL BOTANY 2019; 70:2857-2871. [PMID: 30840768 DOI: 10.1093/jxb/erz093] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2018] [Accepted: 02/12/2019] [Indexed: 05/18/2023]
Abstract
Rice (Oryza sativa) is a major dietary source of the toxic metal cadmium (Cd). Reducing Cd transfer from soil to the rice grain is important for food safety. Rice cultivars vary widely in their Cd accumulation, but the genetic basis for this variation is not fully understood. Based on field and pot experiments comparing 26 rice cultivars, we identified a cultivar with high Cd accumulation in grain (BG367, coded as W4) and a cultivar with low grain Cd accumulation (Huajingxian 74, coded as W0). W4 showed a higher Cd translocation from roots to shoots than W0. Using chromosome single segment substitution lines derived from the two cultivars, we mapped a quantitative trait locus for Cd accumulation in grain to a 400 kb region in chromosome 7. Using yeast expression assays and transgenic complementation, we identified OsHMA3 as the causal gene at this locus. Compared with OsHMA3W0, OsHMA3W4 has a deletion of 14 amino acids predicted to be in the ATP binding domain. OsHMA3W4 showed a complete loss of transport activity for Cd in yeast assays. Taking our findings together, we have identified a new allele of OsHMA3 with a total loss-of-function, resulting in greatly elevated Cd translocation to rice shoots and grain.
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Affiliation(s)
- Fuqing Sui
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, China
| | - Dikun Zhao
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, China
| | - Haitao Zhu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou, China
| | - Yongfu Gong
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou, China
| | - Zhong Tang
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, China
| | - Xin-Yuan Huang
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, China
| | - Guiquan Zhang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou, China
| | - Fang-Jie Zhao
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, China
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830
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Li X, Gu AZ, Zhang Y, Xie B, Li D, Chen J. Sub-lethal concentrations of heavy metals induce antibiotic resistance via mutagenesis. JOURNAL OF HAZARDOUS MATERIALS 2019; 369:9-16. [PMID: 30753956 DOI: 10.1016/j.jhazmat.2019.02.006] [Citation(s) in RCA: 67] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2018] [Revised: 01/31/2019] [Accepted: 02/03/2019] [Indexed: 05/20/2023]
Abstract
The emergence of antibiotic resistance is a growing problem worldwide. Numerous studies have demonstrated that heavy metals facilitate the spread of bacterial drug-resistance in the environment. However, the actions and mechanisms of metals at relatively low sub-lethal levels (far below the minimal inhibitory concentration [MIC]) on antibiotic resistance remain unclear. In this study, we investigated the effect of sub-lethal levels of heavy metals [Ag(I), Zn(II), and Cu(II)] on antibiotic resistance and explored the underlying mechanisms. The results demonstrated that sub-lethal levels of metal ions increased the mutation rates and enriched de novo mutants that exhibited significant resistance to multiple antibiotics. The resistant mutants exhibited hereditary resistance after 5-day of sub-culture. Whole-genome analysis revealed distinct mutations in genes involved in multiple drug and drug-specific resistance, as well as genes that are not associated with antibiotic resistance to data. The number and identities of genetic changes were distinct for mutants induced by different metals. This study provides evidence and mechanistic insights into the induction of antibiotic resistance by sub-lethal concentrations of heavy metals, which may enhance the emergence of antibiotic resistance in various environments. More consideration and regulations should be given to this potential health risk for long-standing and harmful heavy metals.
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Affiliation(s)
- Xiangyang Li
- Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP(3)), Department of Environmental Science and Engineering, Fudan University, Shanghai, 200433, China; College of Environment and Life Sciences, Kaili University, Kaiyuan Road, 556011, Kaili, China
| | - April Z Gu
- School of Civil and Environmental Engineering, Cornell University, Ithaca, NY, 14853, United States
| | - Ye Zhang
- Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP(3)), Department of Environmental Science and Engineering, Fudan University, Shanghai, 200433, China
| | - Bin Xie
- Pure and Applied Biochemistry, Department of Chemistry, Lund University, Box 124, SE, 22100, Lund, Sweden
| | - Dan Li
- Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP(3)), Department of Environmental Science and Engineering, Fudan University, Shanghai, 200433, China.
| | - Jianmin Chen
- Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP(3)), Department of Environmental Science and Engineering, Fudan University, Shanghai, 200433, China
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831
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Lu C, Zhang L, Tang Z, Huang XY, Ma JF, Zhao FJ. Producing cadmium-free Indica rice by overexpressing OsHMA3. ENVIRONMENT INTERNATIONAL 2019; 126:619-626. [PMID: 30856449 DOI: 10.1016/j.envint.2019.03.004] [Citation(s) in RCA: 77] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/24/2018] [Revised: 02/23/2019] [Accepted: 03/01/2019] [Indexed: 05/18/2023]
Abstract
BACKGROUND Considerable proportions of rice grains produced in some areas in southern China contain high concentrations of cadmium (Cd), leading to unsafe levels of dietary Cd intake. Cultivars of Indica rice, widely grown in southern China, are particularly prone to high Cd accumulation in the grain. Effective methods are needed to decrease Cd accumulation in Indica rice. METHODS OsHMA3, encoding a tonoplast Cd transporter, was overexpressed in an elite Indica rice cultivar (Zhongjiazao 17) driven by CaMV 35S promoter. The effects on Cd translocation, accumulation and tolerance, as well as on the agronomic traits and micronutrient concentrations were evaluated. RESULTS OsHMA3 overexpression markedly decreased Cd translocation from roots to shoots and increased Cd tolerance. OsHMA3 overexpression decreased Cd concentrations in brown rice by 94-98%, to levels just above the detection limit, when rice plants were grown in two Cd-contaminated paddy soils. OsHMA3 overexpression generally had no significant effect on grain yield and the concentrations of the essential micronutrients including zinc, iron, copper and manganese in field trials. CONCLUSION Overexpression of OsHMA3 is a highly effective method to reduce Cd accumulation in Indica rice, producing rice grains that were almost Cd free with little effect on grain yield or essential micronutrient concentrations.
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Affiliation(s)
- Chenni Lu
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Lingxiao Zhang
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Zhong Tang
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Xin-Yuan Huang
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Jian Feng Ma
- Institute of Plant Science and Resources, Okayama University, Chuo 2-20-1, Kurashiki 710-0046, Japan
| | - Fang-Jie Zhao
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China.
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832
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Wang L, Cho DW, Tsang DCW, Cao X, Hou D, Shen Z, Alessi DS, Ok YS, Poon CS. Green remediation of As and Pb contaminated soil using cement-free clay-based stabilization/solidification. ENVIRONMENT INTERNATIONAL 2019; 126:336-345. [PMID: 30826612 DOI: 10.1016/j.envint.2019.02.057] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Revised: 02/14/2019] [Accepted: 02/21/2019] [Indexed: 06/09/2023]
Abstract
Stabilization/solidification (S/S) is a low-cost and high-efficiency remediation method for contaminated soils, however, conventional cement-based S/S method has environmental constraints and sustainability concerns. This study proposes a low-carbon, cement-free, clay-based approach for simultaneous S/S of As and Pb in the contaminated soil, and accordingly elucidates the chemical interactions between alkali-activated clay binders and potentially toxic elements. Quantitative X-ray diffraction and 27Al nuclear magnetic resonance analyses indicated that the addition of lime effectively activated the hydration of kaolinite clay, and the presence of limestone further enhanced the polymerization of hydrates. X-ray photoelectron spectroscopy showed that approximately 19% of As[III] was oxidized to As[V] in the alkali-activated clay system, which reduced toxicity and facilitated immobilization of As. During the cement-free S/S process, As and Pb consumed Ca(OH)2 and precipitated as Ca3(AsO4)2·4H2O and Pb3(NO3)(OH)5, respectively, accounting for the low leachability of As (7.0%) and Pb (5.4%). However, the reduced amount of Ca(OH)2 decreased the degree of hydration of clay minerals, and the pH buffering capacity of the contaminated soil hindered the pH increase. Sufficient dosage of lime was required for ensuring satisfactory solidification and contaminant immobilization of the clay-based S/S products. The leachability of As and Pb in high-Ca S/S treated soil samples was reduced by 96.2% and 98.8%, respectively. This is the first study developing a green and cement-free S/S of As- and Pb-contaminated soil using clay minerals as an environmentally compatible binding material.
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Affiliation(s)
- Lei Wang
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China; Department of Materials Science and Engineering, The University of Sheffield, Sir Robert Hadfield Building, Mappin St, Sheffield S1 3JD, United Kingdom
| | - Dong-Wan Cho
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China; Geological Environment Division, Korea Institute of Geoscience and Mineral Resources, Gwahak-ro 124, Yuseong-gu, Daejeon 34132, Republic of Korea
| | - Daniel C W Tsang
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China.
| | - Xinde Cao
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Deyi Hou
- School of Environment, Tsinghua University, Beijing 100084, China
| | - Zhengtao Shen
- School of Environment, Tsinghua University, Beijing 100084, China; Department of Earth and Atmospheric Sciences, University of Alberta, Edmonton T6G 2E3, Canada
| | - Daniel S Alessi
- Department of Earth and Atmospheric Sciences, University of Alberta, Edmonton T6G 2E3, Canada
| | - Yong Sik Ok
- Korea Biochar Research Center, O-Jeong Eco-Resilience Institute (OJERI), Division of Environmental Science and Ecological Engineering, Korea University, Seoul 02841, Republic of Korea
| | - Chi Sun Poon
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
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833
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Cui L, Noerpel MR, Scheckel KG, Ippolito JA. Wheat straw biochar reduces environmental cadmium bioavailability. ENVIRONMENT INTERNATIONAL 2019; 126:69-75. [PMID: 30779992 PMCID: PMC6487192 DOI: 10.1016/j.envint.2019.02.022] [Citation(s) in RCA: 71] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Revised: 01/16/2019] [Accepted: 02/06/2019] [Indexed: 05/22/2023]
Abstract
Cadmium contamination in waters and soils can lead to food chain accumulation and ultimately deterioration in human health; means for reducing bioavailable Cd are desperately required, and biochars may play a role. Long-term (240 d) lab incubation experiments were utilized to explain wheat straw-derived biochar effects on Cd sorption and decreasing Cd bioavailability in soils and solutions (0, 5, and 15% biochar as wt:wt or wt:vol, respectively), and to identify Cd forms present using both the European Community Bureau of Reference (BCR) chemical sequential extraction procedure and synchrotron-based X-ray absorption spectroscopy (XAS). Biochar Cd removal was up to ~90% from Cd-containing solutions and contaminated soil as compared to the control. Based on the wet chemical sequential extraction procedure in conjunction with XAS, biochar application promoted the formation of (oxy)hydroxide, carbonate, and organically bound Cd phases. As a material, biochar may be promoted as a tool for reducing and removing bioavailable Cd from contaminated waters and soils. Thus, biochar may play a role in reducing Cd bioaccumulation, trophic transfer, and improving environmental quality and human health.
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Affiliation(s)
- Liqiang Cui
- School of Environmental Science and Engineering, Yancheng Institute of Technology, No. 211 Jianjun Road, Yancheng 224003, China; Department of Soil and Crop Sciences, Colorado State University, Fort Collins 80523-1170, USA
| | - Matt R Noerpel
- US Environmental Protection Agency, National Risk Management Research Laboratory, Land and Materials Management Division, 5995 Center Hill Avenue, Cincinnati, OH 45224-1701, USA
| | - Kirk G Scheckel
- US Environmental Protection Agency, National Risk Management Research Laboratory, Land and Materials Management Division, 5995 Center Hill Avenue, Cincinnati, OH 45224-1701, USA
| | - James A Ippolito
- Department of Soil and Crop Sciences, Colorado State University, Fort Collins 80523-1170, USA.
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834
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Khaliq MA, Khan Tarin MW, Jingxia G, Yanhui C, Guo W. Soil liming effects on CH 4, N 2O emission and Cd, Pb accumulation in upland and paddy rice. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2019; 248:408-420. [PMID: 30825766 DOI: 10.1016/j.envpol.2019.02.036] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2019] [Revised: 02/05/2019] [Accepted: 02/13/2019] [Indexed: 06/09/2023]
Abstract
Keeping in view the expanding environmental pollution and irrigation water deficit, a pot experiment was performed for the upland (Huyou2, Hanyou737) and paddy rice cultivars (Taigeng8; Yixiang2292), to study soil liming effects on methane (CH4) and nitrous oxide (N2O) emission, bioavailability and accumulation of Cd, Pb in upland and paddy rice. Upland rice reduced 90% of soil CH4 emission as compared to paddy conditions. Soil CH4 emission decreased by 45% and 39% with dolomite, and it reduced by 35% and 33% with lime treatment both in upland and paddy conditions, respectively. Soil N2O emission decreased by 44% and 52% with dolomite, and with the lime application, it was reduced by 37% and 44% for both upland and paddy conditions respectively. Reduction in soil DTPA-extractable Cd was between 37-53% and 43-80% with dolomite and 16-37% and 24-72% Cd decreased with lime application in upland and paddy conditions respectively. Soil DTPA-extractable Pb reduced by 27-44% and 25-53% with dolomite and 16-40% and 11-42% with soil-applied lime in upland and paddy conditions, respectively. Cd accumulation in rice grain was decreased by 47-88% and 62-79% with dolomite and 31-86% and 45-52% reduction by lime application in upland and paddy rice respectively. Rice grain Pb reduced by 58-91% and 66-78% with dolomite application and 32-71% and 44-71% with lime in upland and paddy rice, respectively. Our results showed that soil liming significantly reduced soil N2O and CH4 emission and Cd, Pb accumulation in rice grain, but dolomite was more effective as compared to lime. Altogether, results of this study suggest that upland rice can be cultivated in CdPb polluted soils with least soil CH4 emission. Cd and Pb toxicity, accumulation, and N2O emission in upland rice can be minimized by soil liming of 3 g kg-1 and optimizing the nutrients composition of the soil.
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Affiliation(s)
- Muhammad Athar Khaliq
- College of Resource and Environment, Fujian Agriculture and Forestry University, Fuzhou, 35002, China
| | | | - Guo Jingxia
- College of Resource and Environment, Fujian Agriculture and Forestry University, Fuzhou, 35002, China
| | - Chen Yanhui
- College of Resource and Environment, Fujian Agriculture and Forestry University, Fuzhou, 35002, China
| | - Wang Guo
- College of Resource and Environment, Fujian Agriculture and Forestry University, Fuzhou, 35002, China.
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835
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Guo A, Ding L, Tang Z, Zhao Z, Duan G. Microbial response to CaCO 3 application in an acid soil in southern China. J Environ Sci (China) 2019; 79:321-329. [PMID: 30784455 DOI: 10.1016/j.jes.2018.12.007] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2018] [Revised: 12/12/2018] [Accepted: 12/13/2018] [Indexed: 06/09/2023]
Abstract
Calcium carbonate (CaCO3) application is widely used to ameliorate soil acidification. To counteract soil and bacterial community response to CaCO3 application in an acidic paddy soil in southern China, a field experiment was conducted with four different dosages of CaCO3 addition, 0, 2.25, 4.5 and 7.5 tons/ha, respectively. After one seasonal growth of rice, soil physicochemical properties, soil respiration and bacterial communities were investigated. Results showed that soil pH increased accordingly with increasing dose of CaCO3 addition, and 7.5 tons/ha addition increased soil pH to neutral condition. Moderate dose of CaCO3 application (4.5 tons/ha) significantly increased soil dissolved organic carbon (DOC) and dissolved organic nitrogen (DON) content, enhanced soil respiration, while the excessive CaCO3 application (7.5 tons/ha) decreased these soil properties. High-throughput sequencing results illustrated that moderate dose of CaCO3 application increased the richness and alpha diversity of soil bacterial community. Compared with control, the relative abundance of Anaerolineaceae family belonging to Chloroflexi phylum increased by 38.7%, 35.4% and 24.5% under 2.25, 4.5 and 7.5 tons/ha treatments, respectively. Redundancy analysis (RDA) showed that soil pH was the most important factor shaping soil bacterial community. The results of this study suggest that proper dose of CaCO3 additions to acid paddy soil in southern China could have positive effects on soil properties and bacterial community.
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Affiliation(s)
- Anning Guo
- College of Land Science and Technology, China University of Geosciences (Beijing), Beijing 100083, China.; State Key Lab of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Longjun Ding
- State Key Lab of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Zhong Tang
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Zhongqiu Zhao
- College of Land Science and Technology, China University of Geosciences (Beijing), Beijing 100083, China
| | - Guilan Duan
- State Key Lab of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
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836
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Xiao R, Guo D, Ali A, Mi S, Liu T, Ren C, Li R, Zhang Z. Accumulation, ecological-health risks assessment, and source apportionment of heavy metals in paddy soils: A case study in Hanzhong, Shaanxi, China. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2019; 248:349-357. [PMID: 30818114 DOI: 10.1016/j.envpol.2019.02.045] [Citation(s) in RCA: 108] [Impact Index Per Article: 21.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2018] [Revised: 01/22/2019] [Accepted: 02/15/2019] [Indexed: 06/09/2023]
Abstract
Contamination of agricultural soil by heavy metals has become a global issue concerning food security and human health risk. In this study, a soil investigation was conducted to evaluate metals accumulation, potential ecological and health risks as well as to identify sources of metals in paddy soils in Hanzhong City, which is located in a sedimentary basin. Ninety-two (92) surface soil samples (bulk soil) and their corresponding rice samples, 21 irrigation water samples, and 18 fertilizer samples were collected from two typical counties and quantified for the heavy metals (i.e., As, Cd, Cu, Hg, Pb, and Zn) concentrations. The results showed that As, Cd, and Zn were the main contaminants in soils in the studied area. Additionally, elevated Hg content in soils might also pose risks to the local ecosystem. Cadmium and As demonstrated high mobility, and their average contents in rice grains were slightly higher than the permissible threshold (0.20 mg kg-1). Moreover, Pb, As, and Cd intake via rice consumption might result in potential risks to local residents. Metal distribution revealed that pollution in the studied area is non-homogeneous, and agricultural activities (As, Cu, and Cd), transportation emission (Cu and Pb), coal combustion (Hg and As), and smelting activities (Zn, Pb, and Cu) were ascertained as the potential sources based on the Positive matrix factorization (PMF) analysis results.
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Affiliation(s)
- Ran Xiao
- College of Natural Resources and Environment, Northwest A&F University, Yangling, 712100, PR China
| | - Di Guo
- College of Natural Resources and Environment, Northwest A&F University, Yangling, 712100, PR China
| | - Amjad Ali
- College of Natural Resources and Environment, Northwest A&F University, Yangling, 712100, PR China
| | - Shenshen Mi
- College of Natural Resources and Environment, Northwest A&F University, Yangling, 712100, PR China
| | - Tao Liu
- College of Natural Resources and Environment, Northwest A&F University, Yangling, 712100, PR China
| | - Chunyan Ren
- College of Natural Resources and Environment, Northwest A&F University, Yangling, 712100, PR China
| | - Ronghua Li
- College of Natural Resources and Environment, Northwest A&F University, Yangling, 712100, PR China
| | - Zengqiang Zhang
- College of Natural Resources and Environment, Northwest A&F University, Yangling, 712100, PR China.
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837
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Li D, Wang L, Wang Y, Li H, Chen G. Soil properties and cultivars determine heavy metal accumulation in rice grain and cultivars respond differently to Cd stress. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:14638-14648. [PMID: 30877541 DOI: 10.1007/s11356-019-04727-9] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2018] [Accepted: 01/07/2019] [Indexed: 06/09/2023]
Abstract
Field and pot experiments were conducted to evaluate the factors affecting heavy metal (HM) accumulation in rice grain and subsequently to explore their cultivar difference when exposed to Cd. Forty-seven paired soil and rice cultivar samples were collected from Jiangxi province, China. The contents of Cd, Cu, Zn, Pb, Cr, and Ni in soils and grains were determined. It showed that among these metals, Cr and Cd were the dominant contaminants in samples from the test areas, with 100.0% and 59.6% of all grain samples exceeding the maximum permissible concentration. Random forest analysis showed that soil pH, soil organic matter (SOM), Fe fraction and cultivar were four most important factors affecting HMs accumulation in grain. Based on bioconcentration factors, two cultivars with high Cd (HCd) accumulation ability and two cultivars with low Cd (LCd) accumulation ability in rice grain were chosen to explore their physiological and growth responses when exposed to 0, 50, 100 and 1000 μmol L-1 Cd. The results showed that the Cd phytotoxicity is Cd level- and cultivar-dependent. The height and weight decreased, while Cd accumulation increased in shoot and root for the four rice cultivars with the increasing of Cd content. The HCd cultivars showed less membrane damage, higher superoxide dismutase (SOD) activity and higher Cd accumulation than that of LCd cultivars. In conclusion, heavy metal accumulation in rice grain is soil property- and cultivar-dependent. And different rice cultivars respond differently to Cd stress.
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Affiliation(s)
- Dongqin Li
- Life Science and Technology School, Lingnan Normal University, Zhanjiang, 524048, People's Republic of China
- Key Laboratory of Agro-Environment in the Tropics, Ministry of Agriculture, South China Agricultural University, No. 483, Wushan Road, Guangzhou, 510642, People's Republic of China
| | - Lili Wang
- Key Laboratory of Agro-Environment in the Tropics, Ministry of Agriculture, South China Agricultural University, No. 483, Wushan Road, Guangzhou, 510642, People's Republic of China
- College of Natural Resources and Environment, South China Agricultural University, Guangzhou, 510642, People's Republic of China
| | - Yahui Wang
- Key Laboratory of Agro-Environment in the Tropics, Ministry of Agriculture, South China Agricultural University, No. 483, Wushan Road, Guangzhou, 510642, People's Republic of China
- College of Natural Resources and Environment, South China Agricultural University, Guangzhou, 510642, People's Republic of China
| | - Huashou Li
- Key Laboratory of Agro-Environment in the Tropics, Ministry of Agriculture, South China Agricultural University, No. 483, Wushan Road, Guangzhou, 510642, People's Republic of China
- College of Natural Resources and Environment, South China Agricultural University, Guangzhou, 510642, People's Republic of China
| | - Guikui Chen
- Key Laboratory of Agro-Environment in the Tropics, Ministry of Agriculture, South China Agricultural University, No. 483, Wushan Road, Guangzhou, 510642, People's Republic of China.
- College of Natural Resources and Environment, South China Agricultural University, Guangzhou, 510642, People's Republic of China.
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838
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Gu JF, Zhou H, Tang HL, Yang WT, Zeng M, Liu ZM, Peng PQ, Liao BH. Cadmium and arsenic accumulation during the rice growth period under in situ remediation. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2019; 171:451-459. [PMID: 30639871 DOI: 10.1016/j.ecoenv.2019.01.003] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Revised: 12/22/2018] [Accepted: 01/02/2019] [Indexed: 06/09/2023]
Abstract
Rice (Oryza sativa L.) planted in cadmium (Cd)- and arsenic (As)-contaminated soil is considered the main source of dietary Cd and As intake for humans in Southeast Asia and thereby poses a threat to human health. Minimizing the transfer of these pollutants to rice grain is an urgent task for environmental researchers. The main objective of this study was to investigate the effects and the mechanisms of a combined amendment (hydroxyapatite + zeolite + biochar, HZB) on decreasing Cd and As accumulation in rice. In situ remediation and aqueous solution adsorption experiments were conducted. The results showed that after application of HZB, Cd and As concentrations of the exchangeable fraction and TCLP extraction in soil decreased with the growth of rice plants. Cd concentrations in rice tissues were decreased at the tillering, filling and maturing stages after in situ remediation, while As concentrations in rice tissues were decreased only at the maturing stage. When 8 kg·plot-1 (9000 kg ha-1) HZB was applied, concentrations of Cd and inorganic As in brown rice were decreased to 0.18 and 0.16 mg kg-1, respectively, lower than the levels permissible for grain in China, i.e., 0.2 mg kg-1. Application of HZB reduced Cd accumulation in rice tissues, and the suppression of Cd accumulation was significantly greater than that of As. Furthermore, HZB significantly increased rice grain yield. An aqueous solution adsorption experiment demonstrated that HZB could adsorb and covalently bind Cd and As (V) via -OH, -COOH, -Si-O-Si and CO32- groups to produce carboxylates, silicates and carbonates, thereby promoting in situ immobilization of Cd and As in soil solution.
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Affiliation(s)
- Jiao-Feng Gu
- College of Environment Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China; Hunan Engineering Laboratory for Control of Rice Quality and Safety, Changsha 410004, China.
| | - Hang Zhou
- College of Environment Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China; Hunan Engineering Laboratory for Control of Rice Quality and Safety, Changsha 410004, China.
| | - Hui-Ling Tang
- College of Environment Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China.
| | - Wen-Tao Yang
- College of Environment Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China.
| | - Min Zeng
- College of Environment Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China.
| | - Zhi-Ming Liu
- College of Environment Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China; Department of Biology, Eastern New Mexico University, Portales, NM 88130, USA.
| | - Pei-Qin Peng
- College of Environment Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China; Hunan Engineering Laboratory for Control of Rice Quality and Safety, Changsha 410004, China.
| | - Bo-Han Liao
- College of Environment Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China; Hunan Engineering Laboratory for Control of Rice Quality and Safety, Changsha 410004, China.
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839
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Low Molecular Weight Fluorescent Probes (LMFPs) to Detect the Group 12 Metal Triad. CHEMOSENSORS 2019. [DOI: 10.3390/chemosensors7020022] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Fluorescence sensing, of d-block elements such as Cu2+, Fe3+, Fe2+, Cd2+, Hg2+, and Zn2+ has significantly increased since the beginning of the 21st century. These particular metal ions play essential roles in biological, industrial, and environmental applications, therefore, there has been a drive to measure, detect, and remediate these metal ions. We have chosen to highlight the low molecular weight fluorescent probes (LMFPs) that undergo an optical response upon coordination with the group 12 triad (Zn2+, Cd2+, and Hg2+), as these metals have similar chemical characteristics but behave differently in the environment.
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840
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Du F, Yang Z, Liu P, Wang L. Bioaccessibility and variation of arsenic species in polished rice grains by an in vitro physiologically based extraction test method. Food Chem 2019; 293:1-7. [PMID: 31151588 DOI: 10.1016/j.foodchem.2019.04.079] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2018] [Revised: 03/20/2019] [Accepted: 04/22/2019] [Indexed: 01/01/2023]
Abstract
The bioaccessibility and speciation of arsenic (As) in rice grains have been investigated by the physiologically based extraction test (PBET) method. A total of 42 rice samples were collected from Hunan Province, a typical mine-impacted province in China. The bioaccessibility in the gastrointestinal tract was 71.7 ± 13.5% for the collected rice grains. Arsenite [As(III)] was the predominant As species in the simulated gastric and gastrointestinal solutions, followed by dimethylarsinic acid (DMA), arsenate [As(V)] and monomethylarsonic acid (MMA). The bioaccessible As(V) was irrelevant to As(V) in the rice grains, suggesting that interconversion between As(V) and other species was occurred in the simulated gastrointestinal tract. Monte-Carlo simulation was introduced to assess the health risk from exposure to inorganic As. The average values for target hazard quotient (THQ) and bioaccessible THQ were 2.704 and 1.637, respectively. The inclusion of bioaccessibility reduced the probability of non-carcinogenic health risk from 97.32% to 76.86%.
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Affiliation(s)
- Fan Du
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China
| | - Zhaoguang Yang
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China; Center for Environment and Water Resources, Central South University, Changsha 410083, China
| | - Peng Liu
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China
| | - Lin Wang
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China.
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841
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Li X, Yu H, Sun X, Yang J, Wang D, Shen L, Pan Y, Wu Y, Wang Q, Zhao Y. Effects of sulfur application on cadmium bioaccumulation in tobacco and its possible mechanisms of rhizospheric microorganisms. JOURNAL OF HAZARDOUS MATERIALS 2019; 368:308-315. [PMID: 30685719 DOI: 10.1016/j.jhazmat.2018.12.099] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Revised: 11/15/2018] [Accepted: 12/26/2018] [Indexed: 06/09/2023]
Abstract
A potting experiment was conducted to investigate the effect of sulfur application on the bioaccumulation by tobacco and its mechanisms of rhizospheric microorganisms. Cadmium content in tobacco was analyzed using atomic absorption spectrometer, while bacterial community and related gene in soil were analyzed via high-throughput sequencing and quantitative PCR techniques, respectively. The obtained results indicated that tobacco had the ability to accumulate cadmium under no sulfur application conditions, with cadmium contents of 35.4, 23.6, and 26.3 mg kg-1 in leaves, stems, and roots, respectively. Under high-sulfur treatment, these values increased to 66.4, 46.1, and 42.6 mg kg-1, respectively, probably due to the increase of the available cadmium content (from 1.1 to 3.3 mg kg-1) in the soil through a decrease of the soil pH value, which was contributed by the sulfur oxidation reaction. dsrA and soxB genes might play an important role in sulfur oxidation, and Thiobacillus sp. was the dominant bacterial genus during the sulfur oxidation process. In addition, sulfur application exerted little effect on the diversity and structure of the soil bacterial community. The combined results indicate that sulfur application is an effective and safe method for Cd phytoextraction by tobacco.
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Affiliation(s)
- Xuanzhen Li
- College of Forestry, Henan Agricultural University, Zhengzhou, 450002, China
| | - Hao Yu
- College of Forestry, Henan Agricultural University, Zhengzhou, 450002, China
| | - Xiaowei Sun
- Henan Academy of Forestry, Zhengzhou, 450008, China
| | - Jiantao Yang
- College of Forestry, Henan Agricultural University, Zhengzhou, 450002, China
| | - Daichang Wang
- College of Resources and Environment, Henan Agricultural University, Zhengzhou, 450002, China
| | - Lianfeng Shen
- College of Forestry, Henan Agricultural University, Zhengzhou, 450002, China
| | - Yanshuo Pan
- College of Life Science, Henan Agricultural University, Zhengzhou, 450002, China
| | - Yucheng Wu
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China
| | - Qiang Wang
- College of Resources and Environment, Henan Agricultural University, Zhengzhou, 450002, China
| | - Yong Zhao
- College of Forestry, Henan Agricultural University, Zhengzhou, 450002, China.
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842
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Kollárová K, Kusá Z, Vatehová-Vivodová Z, Lišková D. The response of maize protoplasts to cadmium stress mitigated by silicon. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2019; 170:488-494. [PMID: 30553927 DOI: 10.1016/j.ecoenv.2018.12.016] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2018] [Revised: 12/04/2018] [Accepted: 12/06/2018] [Indexed: 05/24/2023]
Abstract
The aim of this article was to evaluate the viability of maize protoplasts, cell wall regeneration, Cd uptake by protoplasts, and the impact of silicon under cadmium cations (Cd) stress in two maize hybrids with contrasting tolerances to Cd toxicity. The differences in protoplast viability between the sensitive (Novania) and tolerant (Almansa) hybrids were noticeable even at the beginning of culture. The percentage of living protoplasts in the presence of Cd was higher in the tolerant hybrid. In both hybrids, Si supplementation significantly increased the viability of protoplasts exposed to Cd. The percentage of protoplasts with regenerated cell walls gradually increased in both hybrids and by the end of the culture it had reached almost identical values. Differences were observed during the first four days, when a lag phase occurred in the protoplasts of the sensitive hybrid accompanied by a rapid decrease in protoplast viability in all the variants tested. The addition of Si increased the cell wall regeneration compared with the Cd variant in both hybrids. The Cd content was higher in the tolerant hybrid than in the sensitive one during the first four days and declined on the seventh day. This may be connected with the increasing intensity of cell wall formation from the fourth up to the seventh day. The addition of Si decreased the Cd uptake into protoplasts of both hybrids. Despite the higher content of Cd, the protoplasts of the tolerant hybrid showed higher viability, obviously indicating unequal mechanisms of Cd processing in studied hybrids. CAPSULE: Protoplasts of two maize hybrids were tested for their viability, regeneration, Cd-uptake and the mitigation of cadmium stress by silicon.
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Affiliation(s)
- Karin Kollárová
- Department of Glycobiotechnology, Institute of Chemistry, Slovak Academy of Sciences, Dúbravská cesta 9, 845 38 Bratislava, Slovakia.
| | - Zuzana Kusá
- Plant Science and Biodiversity Center, Slovak Academy of Sciences, Dúbravská cesta 9, 845 23 Bratislava, Slovakia
| | - Zuzana Vatehová-Vivodová
- Department of Glycobiotechnology, Institute of Chemistry, Slovak Academy of Sciences, Dúbravská cesta 9, 845 38 Bratislava, Slovakia
| | - Desana Lišková
- Department of Glycobiotechnology, Institute of Chemistry, Slovak Academy of Sciences, Dúbravská cesta 9, 845 38 Bratislava, Slovakia
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843
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Jiang M, Liu S, Li Y, Li X, Luo Z, Song H, Chen Q. EDTA-facilitated toxic tolerance, absorption and translocation and phytoremediation of lead by dwarf bamboos. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2019; 170:502-512. [PMID: 30557708 DOI: 10.1016/j.ecoenv.2018.12.020] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2018] [Revised: 12/06/2018] [Accepted: 12/08/2018] [Indexed: 05/24/2023]
Abstract
Bamboos are considered as potential plants for phytoremediation. However, the mechanisms of EDTA-assisted bamboo for lead (Pb) control has not been described. The objective of this study was to examine the tolerance and behaviors of Pb to screen bamboos for Pb-contaminated soil and to explore the effects of EDTA on their phytoremediation. In this regard, five dwarf bamboos were treated with various doses Pb (0-1500 mg kg-1) and/or EDTA (500 or 250-1000 mg kg-1) to investigate antioxidant systems and Pb accumulation/species. Our findings showed that different doses of Pb significantly affect lipid peroxidation and antioxidant compounds in studied bamboos. EDTA increased the absorption of soil Pb2+ in all tissues with increasing Pb doses, while the Pb concentrations in all bamboo roots was higher than those in other tissues. Among these plants, Arundinaria argenteostriata (AA) and A. fortunei (AF) showed greater oxidative tolerance than other bamboos. Moreover, Pb accumulation showed the highest values in AA and AF plants relative to other bamboos. With increasing EDTA doses, levels of reducible and residual Pb decreased but the weak acid-soluble and total Pb increased in Pb-stressed AA/AF soils. Similarly, EDTA increased Pb2+ concentration in both bamboo tissues, while the Pb2+ level in leaves was higher than that in other organs at the highest EDTA dose. This study provides the first comprehensive evidence regarding EDTA enhancing the availability, absorption, and translocation of Pb in bamboo/soil, suggesting the application of EDTA may be an effective strategy for phytoremediation with two Arundinaria bamboos in Pb-contaminated soils.
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Affiliation(s)
- Mingyan Jiang
- College of Landscape Architecture, Sichuan Agricultural University, Chengdu, Sichuan 611130, China
| | - Shiliang Liu
- College of Landscape Architecture, Sichuan Agricultural University, Chengdu, Sichuan 611130, China
| | - Yangfan Li
- College of Landscape Architecture, Sichuan Agricultural University, Chengdu, Sichuan 611130, China
| | - Xi Li
- College of Landscape Architecture, Sichuan Agricultural University, Chengdu, Sichuan 611130, China
| | - Zhenghua Luo
- College of Landscape Architecture, Sichuan Agricultural University, Chengdu, Sichuan 611130, China
| | - Huixing Song
- College of Landscape Architecture, Sichuan Agricultural University, Chengdu, Sichuan 611130, China
| | - Qibing Chen
- College of Landscape Architecture, Sichuan Agricultural University, Chengdu, Sichuan 611130, China.
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844
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Deng F, Yu M, Martinoia E, Song WY. Ideal Cereals With Lower Arsenic and Cadmium by Accurately Enhancing Vacuolar Sequestration Capacity. Front Genet 2019; 10:322. [PMID: 31024630 PMCID: PMC6467212 DOI: 10.3389/fgene.2019.00322] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2019] [Accepted: 03/22/2019] [Indexed: 12/29/2022] Open
Abstract
Cereals are a staple food for many people around the world; however, they are also a major dietary source of toxic metal(loid)s. Many agricultural regions throughout the world are contaminated with toxic metal(loid)s, which can accumulate to high levels in the grains of cereals cultivated in these regions, posing serious health risks to consumers. Arsenic (As) and cadmium (Cd) are efficiently accumulated in cereals through metal transport pathways. Therefore, there is an urgent need to develop crops that contain greatly reduced levels of toxic metal(loid)s. Vacuolar sequestration of toxic metal(loid)s is a primary strategy for reducing toxic metal(loid)s in grains. However, until recently, detailed strategies and mechanisms for reducing toxic metal(loid)s in grain were limited by the lack of experimental data. New strategies to reduce As and Cd in grain by enhancing vacuolar sequestration in specific tissues are critical to develop crops that lower the daily intake of As and Cd, potentially improving human health. This review provides insights and strategies for developing crops with strongly reduced amounts of toxic metal(loid)s without jeopardizing agronomic traits.
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Affiliation(s)
- Fenglin Deng
- Department of Horticulture, Foshan University, Foshan, China
- Department of Integrative Biosciences and Biotechnology, Pohang University of Science and Technology, Pohang, South Korea
| | - Min Yu
- Department of Horticulture, Foshan University, Foshan, China
| | - Enrico Martinoia
- Institute of Plant Biology, University of Zurich, Zurich, Switzerland
| | - Won-Yong Song
- Department of Horticulture, Foshan University, Foshan, China
- Department of Integrative Biosciences and Biotechnology, Pohang University of Science and Technology, Pohang, South Korea
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845
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Shi W, Zhang Y, Chen S, Polle A, Rennenberg H, Luo ZB. Physiological and molecular mechanisms of heavy metal accumulation in nonmycorrhizal versus mycorrhizal plants. PLANT, CELL & ENVIRONMENT 2019; 42:1087-1103. [PMID: 30375657 DOI: 10.1111/pce.13471] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2018] [Revised: 10/26/2018] [Accepted: 10/26/2018] [Indexed: 06/08/2023]
Abstract
Uptake, translocation, detoxification, and sequestration of heavy metals (HMs) are key processes in plants to deal with excess amounts of HM. Under natural conditions, plant roots often establish ecto- and/or arbuscular-mycorrhizae with their fungal partners, thereby altering HM accumulation in host plants. This review considers the progress in understanding the physiological and molecular mechanisms involved in HM accumulation in nonmycorrhizal versus mycorrhizal plants. In nonmycorrhizal plants, HM ions in the cells can be detoxified with the aid of several chelators. Furthermore, HMs can be sequestered in cell walls, vacuoles, and the Golgi apparatus of plants. The uptake and translocation of HMs are mediated by members of ZIPs, NRAMPs, and HMAs, and HM detoxification and sequestration are mainly modulated by members of ABCs and MTPs in nonmycorrhizal plants. Mycorrhizal-induced changes in HM accumulation in plants are mainly due to HM sequestration by fungal partners and improvements in the nutritional and antioxidative status of host plants. Furthermore, mycorrhizal fungi can trigger the differential expression of genes involved in HM accumulation in both partners. Understanding the molecular mechanisms that underlie HM accumulation in mycorrhizal plants is crucial for the utilization of fungi and their host plants to remediate HM-contaminated soils.
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Affiliation(s)
- Wenguang Shi
- State Key Laboratory of Tree Genetics and Breeding, Key Laboratory of Silviculture of the State Forestry Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, 100091, China
| | - Yuhong Zhang
- State Key Laboratory of Tree Genetics and Breeding, Key Laboratory of Silviculture of the State Forestry Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, 100091, China
| | - Shaoliang Chen
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, College of Biological Sciences and Technology, Beijing Forestry University, Beijing, 100083, China
| | - Andrea Polle
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, College of Biological Sciences and Technology, Beijing Forestry University, Beijing, 100083, China
- Forest Botany and Tree Physiology, University of Goettingen, 37077, Göttingen, Germany
| | - Heinz Rennenberg
- Institute for Forest Sciences, University of Freiburg, 79110, Freiburg, Germany
| | - Zhi-Bin Luo
- State Key Laboratory of Tree Genetics and Breeding, Key Laboratory of Silviculture of the State Forestry Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, 100091, China
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846
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Jin H, Yan D, Zhu N, Zhang S, Zheng M. Immobilization of metal(loid)s in hydrochars produced from digested swine and dairy manures. WASTE MANAGEMENT (NEW YORK, N.Y.) 2019; 88:10-20. [PMID: 31079621 DOI: 10.1016/j.wasman.2019.03.027] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2018] [Revised: 03/13/2019] [Accepted: 03/15/2019] [Indexed: 05/16/2023]
Abstract
Anaerobic digestion technology is widely used for treatment of swine and dairy manures in livestock farms, but the digested swine and dairy manures (SD-S, SD-D) must be properly disposed. In this study, hydrothermal carbonization (HTC) was used to deal with SD-S and SD-D. The resulting hydrochars (HC-S and HC-D) were investigated for the migration, speciation and potential environmental risk of metal(loid)s therein. The results showed that about 20%-50% of metal(loid)s in SD-S and 11%-36% in SD-D lost through the dissolution of the metal(loid)s in solution during HTC process. The remaining metal(loid)s were more concentrated in HC-D compared to HC-S. The concentrations of water-extractable metal(loid)s showed clear decrease trend in HC-S and HC-D. The bioavailable metal(loid) fraction (acid soluble/exchangeable fraction and reducible fraction) were transformed into the stable fraction (residual fraction) during HTC process. The results indicated that HTC process could immobilize most metal(loid)s leaching from HC-S and HC-D, except for Zn and Cd in HC-S. The maximum leaching concentrations of all metal(loid)s happened at pH of 2; meanwhile less fraction of metal(loid)s can be leached out from HC-D into water. The environmental risk assessment values suggested that HC-D was more environment-friendly than HC-S. This study provides a useful support for reuse of HC-S and HC-D as pollution remediation and soil amendment with very low leaching toxicity and potential ecological risk of metal(loid)s.
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Affiliation(s)
- Hongmei Jin
- Circular Agriculture Research Center, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China; East China Scientific Observing and Experimental Station of Development and Utilization of Rural Renewable Energy, Ministry of Agriculture, Nanjing 210014, China.
| | - Demin Yan
- Nanjing Forest Police College, Nanjing 210023, China
| | - Ning Zhu
- Circular Agriculture Research Center, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China; East China Scientific Observing and Experimental Station of Development and Utilization of Rural Renewable Energy, Ministry of Agriculture, Nanjing 210014, China
| | - Songhe Zhang
- College of Environment, Hohai University, Nanjing 210098, China
| | - Mengjie Zheng
- College of Environment, Hohai University, Nanjing 210098, China
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847
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Li R, Huang H, Wang JJ, Liang W, Gao P, Zhang Z, Xiao R, Zhou B, Zhang X. Conversion of Cu(II)-polluted biomass into an environmentally benign Cu nanoparticles-embedded biochar composite and its potential use on cyanobacteria inhibition. JOURNAL OF CLEANER PRODUCTION 2019; 216:25-32. [DOI: 10.1016/j.jclepro.2019.01.186] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/20/2023]
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848
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Liu M, Wang T, Skidmore AK, Liu X, Li M. Identifying rice stress on a regional scale from multi-temporal satellite images using a Bayesian method. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2019; 247:488-498. [PMID: 30703682 DOI: 10.1016/j.envpol.2019.01.024] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Revised: 11/05/2018] [Accepted: 01/08/2019] [Indexed: 06/09/2023]
Abstract
Crops are prone to various types of stress, such as caused by heavy metals, drought and pest/disease, during their life cycle. Heavy metal stress in crops poses a serious threat to crop quality and human health. However, differentiating between heavy metal and non-heavy metal stress presents a great challenge, since responses to environmental stress in crops are complex and uncertain, with different stressors possibly triggering similar canopy reflectance responses. This study aims to infer the occurrence probability of heavy metal stress (i.e., Cd stress) on a regional scale by integrating satellite-derived vegetation index and spatio-temporal characteristics of different stressors with a Bayesian method. The study area is located in the Hunan Province, China. Seven scenes of Sentinel-2 satellite images from 2016 to 2017 were collected, as well as Cd concentrations in the soil. First, the probability of rice being stressed was screened using the normalized difference red-edge index (NDRE) at all the growth stages of rice. Further, the stressed rice was used as input, along with the coefficients of spatio-temporal variation (CSTV) derived from NDRE, for a Bayesian method to infer rice exposed to Cd pollution. The results demonstrated that NDRE was a sensitive indicator for assessing stress levels in rice crops. The CSTV with a threshold of 2.7 successfully detected rice under Cd as well as abrupt stress on a regional scale. A high map accuracy for Cd induced stress in rice was achieved with an accuracy of 81.57%. This study suggests that vegetation index obtained from satellite images can assist in capturing crop stress, and that the used Bayesian method can be very useful for distinguishing a specific stressor in crops by incorporating temporal-spatial characteristic of different stressors in crops into satellite-derived vegetation index.
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Affiliation(s)
- Meiling Liu
- School of Information Engineering, China University of Geosciences, Beijing, 100083, China.
| | - Tiejun Wang
- Faculty of Geo-Information Science and Earth Observation (ITC), University of Twente, P.O. Box 217, 7500 AE, Enschede, the Netherlands
| | - Andrew K Skidmore
- Faculty of Geo-Information Science and Earth Observation (ITC), University of Twente, P.O. Box 217, 7500 AE, Enschede, the Netherlands; Department of Environmental Science, Macquarie University, NSW, 2109, Australia
| | - Xiangnan Liu
- School of Information Engineering, China University of Geosciences, Beijing, 100083, China
| | - Mengmeng Li
- Faculty of Geo-Information Science and Earth Observation (ITC), University of Twente, P.O. Box 217, 7500 AE, Enschede, the Netherlands
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849
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Health Assessment of Trace Metal Concentrations in Organic Fertilizer in Northern China. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2019; 16:ijerph16061031. [PMID: 30901918 PMCID: PMC6466333 DOI: 10.3390/ijerph16061031] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/23/2018] [Revised: 03/14/2019] [Accepted: 03/17/2019] [Indexed: 11/16/2022]
Abstract
The application of organic fertilizer could be accompanied by potential hazards to soil and humans caused by trace metals. A wide survey of organic fertilizers was carried out in northern China. A total of 117 organic fertilizer samples were collected to analyze the concentrations of seven trace metals. Simulation models were used to estimate the trace metal accumulation risk in soil and non-carcinogenic and carcinogenic risks to the human body. The concentrations of trace metals varied widely (Cr: 2.74⁻151.15; Ni: 2.94⁻49.35; Cu: 0.76⁻378.32; Zn: 0.50⁻1748.01; As: 1.54⁻23.96; Cd: 2.74⁻151.15; and Pb: 1.60⁻151.09 mg·kg-1). Chinese organic fertilizer standard limits were exceeded by0.85% for Cr, 5.98% for As, 1.71% for Cd, and 4.27% for Pb. Monte Carlo simulations showed that repeated application of organic fertilizer likely significantly increased the concentrations of Zn, Cd, and As in soil compared with the soil background levels according to the Soil Environmental Quality Standards of China. As and Cr pose high risks to human health, especially as carcinogenic risk factors with a skin exposure pathway. Reducing the content of Cr, Cu, Zn, As, and Cd in organic fertilizer would be of great significance for minimizing the damage caused by trace metals.
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850
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Zhang D, Du G, Chen D, Shi G, Rao W, Li X, Jiang Y, Liu S, Wang D. Effect of elemental sulfur and gypsum application on the bioavailability and redistribution of cadmium during rice growth. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 657:1460-1467. [PMID: 30677912 DOI: 10.1016/j.scitotenv.2018.12.057] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2018] [Revised: 11/01/2018] [Accepted: 12/04/2018] [Indexed: 06/09/2023]
Abstract
Recently, concerns over heavy metal contamination of soil have grown. The application of sulfur has been recommended to enhance crop productivity and increase soil cadmium (Cd) immobilization. In this study, a pool experiment was conducted to investigate the effects of two sulfur sources and multiple treatment levels on rice growth and Cd accumulation. The two sulfur forms were elemental sulfur (S0) and gypsum, both of which were applied at 0, 0.15, and 0.30 g S kg-1 soil, for a total of five treatments. The results showed that both S0 and gypsum significantly increased rice biomass compared to the control (CK), and rice yield was increased 2.8-4.8 folds. The effect size was greater for gypsum than S0. The application of S0 reduced the rice grain Cd concentration from 0.61 mg kg-1 (CK) to 0.41-0.46 mg kg-1, while gypsum reduced the Cd concentration to 0.24-0.43 mg kg-1. The lower gypsum application level achieved the greatest reduction in rice grain Cd accumulation. This study further demonstrated that the application of S0 and gypsum led to a decrease in the labile Cd percentage and an increase in the stable Cd percentage. In bulk soil, iron and manganese oxide-bound Cd increased by 6.4-7.3% and 0.7-2.0% for the S0 and gypsum treatments, respectively. In the rhizosphere, residual Cd increased by >0.6%. Furthermore, this study found that sulfur application reduced Cd transfer from root to shoot, and significantly decreased rice grain Cd accumulation. These findings indicate that sulfur application to paddy soils can promote rice productivity and effectively remediate soil Cd contamination, with a greater effect by gypsum than S0.
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Affiliation(s)
- Dengxiao Zhang
- College of Resources and Environment, Henan Agricultural University, Zhengzhou 450002, China
| | - Guanghui Du
- College of Resources and Environment, Henan Agricultural University, Zhengzhou 450002, China
| | - De Chen
- Institute of Quality and Standard for Agro-products, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
| | - Gaoling Shi
- Institute of Food Crops, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
| | - Wei Rao
- College of Resources and Environment, Henan Agricultural University, Zhengzhou 450002, China
| | - Xin Li
- College of Sciences, Henan Agricultural University, Zhengzhou 450002, China
| | - Ying Jiang
- College of Resources and Environment, Henan Agricultural University, Zhengzhou 450002, China
| | - Shiliang Liu
- College of Resources and Environment, Henan Agricultural University, Zhengzhou 450002, China
| | - Daichang Wang
- College of Resources and Environment, Henan Agricultural University, Zhengzhou 450002, China.
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