951
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Li Q, Du H, Chen W, Hao J, Huang Q, Cai P, Feng X. Aging shapes the distribution of copper in soil aggregate size fractions. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2018; 233:569-576. [PMID: 29102887 DOI: 10.1016/j.envpol.2017.10.091] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2017] [Revised: 09/18/2017] [Accepted: 10/23/2017] [Indexed: 06/07/2023]
Abstract
Soil aggregates are often considered the basic structural elements of soils. Aggregates of different size vary in their ability to retain or transfer heavy metals in the environment. Here, after incubation of a sieved (<2 mm) topsoil with copper, bulk soil was separated into four aggregate-size fractions and their adsorption characteristics for Cu were determined. By combining nano-scale secondary ion mass spectrometry and C-1s Near Edge X-ray Absorption Fine Structure Spectroscopy, we found that copper tends to bind onto organic matter in the <2 μm and 20-63 μm aggregates. Surprisingly, Cu correlated with carboxyl-C in the <2 μm aggregates but with alkyl-C in the 20-63 μm aggregates. This is the first attempt to visualize the spatial distribution of copper in aggregate size fractions. These direct observations can help improve the understanding of interactions between heavy metals and various soil components.
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Affiliation(s)
- Qi Li
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China; Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture, College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China
| | - Huihui Du
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China; Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture, College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China
| | - Wenli Chen
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China; Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture, College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China.
| | - Jialong Hao
- Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Chinese Academy of Sciences, 19 Beituchengxi Rd., Beijing 100029, China
| | - Qiaoyun Huang
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China; Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture, College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China.
| | - Peng Cai
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China
| | - Xionghan Feng
- Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture, College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China
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952
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Chen B, Han MY, Peng K, Zhou SL, Shao L, Wu XF, Wei WD, Liu SY, Li Z, Li JS, Chen GQ. Global land-water nexus: Agricultural land and freshwater use embodied in worldwide supply chains. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 613-614:931-943. [PMID: 28946381 DOI: 10.1016/j.scitotenv.2017.09.138] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2017] [Revised: 09/13/2017] [Accepted: 09/14/2017] [Indexed: 06/07/2023]
Abstract
As agricultural land and freshwater inextricably interrelate and interact with each other, the conventional water and land policy in "silos" should give way to nexus thinking when formulating the land and water management strategies. This study constructs a systems multi-regional input-output (MRIO) model to expound global land-water nexus by simultaneously tracking agricultural land and freshwater use flows along the global supply chains. Furthermore, land productivity and irrigation water requirements of 160 crops in different regions are investigated to reflect the land-water linkage. Results show that developed economies (e.g., USA and Japan) and major large developing economies (e.g., mainland China and India) are the overriding drivers of agricultural land and freshwater use globally. In general, significant net transfers of these two resources are identified from resource-rich and less-developed economies to resource-poor and more-developed economies. For some crops, blue water productivity is inversely related to land productivity, indicating that irrigation water consumption is sometimes at odds with land use. The results could stimulus international cooperation for sustainable land and freshwater management targeting on original suppliers and final consumers along the global supply chains. Moreover, crop-specific land-water linkage could provide insights for trade-off decisions on minimizing the environmental impacts on local land and water resources.
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Affiliation(s)
- B Chen
- Laboratory of Systems Ecology and Sustainability Science, College of Engineering, Peking University, Beijing 100871, China
| | - M Y Han
- Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, PR China
| | - K Peng
- Department of New Energy Science and Engineering, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR China
| | - S L Zhou
- State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, PR China
| | - L Shao
- School of Humanities and Economic Management, China University of Geosciences, Beijing 100083, People's Republic of China
| | - X F Wu
- Economics School, Zhongnan University of Economics and Law, Wuhan 430073, China
| | - W D Wei
- Business School, University of Shanghai for Science and Technology, Shanghai 200093, China
| | - S Y Liu
- Hebei Provincial Key Laboratory of Heavy Machinery Fluid Power Transmission and Control, Yanshan University, Qinhuangdao 066004, PR China
| | - Z Li
- Laboratory of Systems Ecology and Sustainability Science, College of Engineering, Peking University, Beijing 100871, China
| | - J S Li
- State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, PR China; Department of New Energy Science and Engineering, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR China.
| | - G Q Chen
- Laboratory of Systems Ecology and Sustainability Science, College of Engineering, Peking University, Beijing 100871, China.
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953
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Yang Y, Chen J, Huang Q, Tang S, Wang J, Hu P, Shao G. Can liming reduce cadmium (Cd) accumulation in rice (Oryza sativa) in slightly acidic soils? A contradictory dynamic equilibrium between Cd uptake capacity of roots and Cd immobilisation in soils. CHEMOSPHERE 2018; 193:547-556. [PMID: 29169130 DOI: 10.1016/j.chemosphere.2017.11.061] [Citation(s) in RCA: 65] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2017] [Revised: 11/05/2017] [Accepted: 11/13/2017] [Indexed: 05/27/2023]
Abstract
Cadmium (Cd) accumulation in rice is strongly controlled by liming, but information on the use of liming to control Cd accumulation in rice grown in slightly acidic soils is inconsistent. Here, pot experiments were carried out to investigate the mechanisms of liming on Cd accumulation in two rice varieties focusing on two aspects: available/exchangeable Cd content in soils that were highly responsive to liming, and Cd uptake and transport capacity in the roots of rice in terms of Cd accumulation-relative gene expression. The results showed that soil availability and exchangeable iron, manganese, zinc and Cd contents decreased with increased liming, and that genes related to Cd uptake (OsNramp5 and OsIRT1) were sharply up-regulated in the roots of the two rice varieties. Thus, iron, manganese, zinc and Cd contents in rice plants increased under low liming applications but decreased in response to high liming applications. However, yield and rice quantities were only slightly affected. These results indicated that Cd accumulation in rice grown in slightly acidic soils presents a contradictory dynamic equilibrium between Cd uptake capacity by roots and soil Cd immobilisation in response to liming. The enhanced Cd uptake capacity under low liming dosages increases risks to human health.
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Affiliation(s)
- Yongjie Yang
- State Key Laboratory of Rice Biology, China National Rice Research Institute, 359 Tiyuchang Road, Hangzhou 310006, People's Republic of China
| | - Jiangmin Chen
- State Key Laboratory of Rice Biology, China National Rice Research Institute, 359 Tiyuchang Road, Hangzhou 310006, People's Republic of China; Southern Regional Collaborative Innovation Center for Grain and Oil Crops, Hunan Agriculture University, Changsha 410128, People's Republic of China
| | - Qina Huang
- State Key Laboratory of Rice Biology, China National Rice Research Institute, 359 Tiyuchang Road, Hangzhou 310006, People's Republic of China
| | - Shaoqing Tang
- State Key Laboratory of Rice Biology, China National Rice Research Institute, 359 Tiyuchang Road, Hangzhou 310006, People's Republic of China
| | - Jianlong Wang
- Southern Regional Collaborative Innovation Center for Grain and Oil Crops, Hunan Agriculture University, Changsha 410128, People's Republic of China
| | - Peisong Hu
- State Key Laboratory of Rice Biology, China National Rice Research Institute, 359 Tiyuchang Road, Hangzhou 310006, People's Republic of China.
| | - Guosheng Shao
- State Key Laboratory of Rice Biology, China National Rice Research Institute, 359 Tiyuchang Road, Hangzhou 310006, People's Republic of China.
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954
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Zhang Y, Zhang S, Zhu F, Wang A, Dai H, Cheng S, Wang J, Tang L. Atmospheric heavy metal deposition in agro-ecosystems in China. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:5822-5831. [PMID: 29235022 DOI: 10.1007/s11356-017-0892-3] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2017] [Accepted: 11/29/2017] [Indexed: 06/07/2023]
Abstract
Atmospheric deposition has become one of the main sources of heavy metals in crops in developed and industrial zones in China for the past several years. However, lack of data of the agro-ecosystems on the vast areas of China makes it difficult to assess the impacts of air pollution on the heavy metal accumulation in crops. In this study, with deposit samples from 67 sites located at different agro-ecosystems (typical, factory nearby, town nearby, roadside, and remote) of four natural regions [Huanghuai (HH), Southeast (SE), Southwest (SW) and upper-mid Yangzi River (Up-mid YR)], atmospheric heavy metal deposition in agro-ecosystems on a large scale in China was studied. The results showed that during the growing season, the deposition fluxes of Cr, Ni, As, Cd, and Pb in typical agro-ecosystems were 0.60-36.86, 0.65-25.37, 0.05-8.88, 0.12-5.81, and 0.43-35.63 μg m-2 day-1, respectively, which varied greatly between the four different regions. The average deposition fluxes of Cr, Ni, Cd, and Pb in the HH region, as well as the fluxes of As in the SW region, were significantly higher than those in the SE region. Heavy metal deposition rates among agro-ecosystems were very similar, except for the sites around cement factory in flat HH region. In mountainous SW region, however, deposition rates varied widely with sites nearby towns relatively higher and remote regions much lower. Higher correlation coefficients were observed between Cr, As, Pb, and Ni deposition rates, suggesting that they had similar sources. Samples from the SW and SE regions exhibited higher 207Pb/206Pb and 208Pb/206Pb ratios than those from the HH and Up-mid YR regions. Airborne Pb in SW agro-ecosystems were mainly derived from vehicle exhaust and local smelting, whereas that in the HH region from burning of northern Chinese coal.
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Affiliation(s)
- Yanling Zhang
- Key Laboratory of Eco-environment & Tobacco Leaf Quality, CNTC, Zhengzhou, People's Republic of China.
| | - Shixiang Zhang
- Key Laboratory of Eco-environment & Tobacco Leaf Quality, CNTC, Zhengzhou, People's Republic of China
| | - Fengpeng Zhu
- China National Tobacco Quality Supervision & Test Center, Zhengzhou, People's Republic of China
| | - Aiguo Wang
- Key Laboratory of Eco-environment & Tobacco Leaf Quality, CNTC, Zhengzhou, People's Republic of China
| | - Huaxin Dai
- Key Laboratory of Eco-environment & Tobacco Leaf Quality, CNTC, Zhengzhou, People's Republic of China
| | - Sen Cheng
- Shanghai Tobacco Group Co., Ltd., Shanghai, People's Republic of China
| | - Jianwei Wang
- Key Laboratory of Eco-environment & Tobacco Leaf Quality, CNTC, Zhengzhou, People's Republic of China
| | - Lina Tang
- Fujian Tobacco Research Institute, Fuzhou, People's Republic of China
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955
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Guo F, Ding C, Zhou Z, Huang G, Wang X. Effects of combined amendments on crop yield and cadmium uptake in two cadmium contaminated soils under rice-wheat rotation. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2018; 148:303-310. [PMID: 29091832 DOI: 10.1016/j.ecoenv.2017.10.043] [Citation(s) in RCA: 70] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2017] [Accepted: 10/19/2017] [Indexed: 05/27/2023]
Abstract
Soil cadmium (Cd) contamination in China has become a serious concern due to its high toxicity to human health through food chains. A pot experiment was conducted to investigate the effects of hydrated lime (L), hydroxyapatite (H) and organic fertilizer (F) alone or in combination to remedy a mild (DY) and a moderate (YX) Cd contaminated agricultural soil under rice-wheat rotation. Results showed that crops grain yield and Cd concentration, soil pH, CaCl2 extractable Cd and Cd speciation were markedly affected by the amendments. In both cropping seasons, hydrated lime and hydroxyapatite significantly immobilized soil Cd, and hydroxyapatite, organic fertilizer significantly increased grain yield. Hydrated lime mainly increased soil carbonates bound Cd fractions resulted from 16.7% to 36.2% and from 16.8% to 28.3%, and hydroxyapatite increased Fe/Mn oxides Cd fractions from 19.3% to 33.4% and from 31.4% to 42.1% in the DY and YX soils, respectively; while organic fertilizer slightly increased soil exchangeable and organic matter bound Cd fractions. Besides, combined amendments contain alkaline materials and organic materials have the potential to decrease grain Cd and increase grain yield simultaneously. Therefore, in view of the effects of amendments on grain yield and Cd concentration, the cost as well as the potential benefits expected, combined amendments like hydrated lime + organic fertilizer, hydrated lime + hydroxyapatite + organic fertilizer are recommended in practical application. Mechanisms of Cd immobilization affected by amendments are mainly attributed to the changes in soil Cd availability and crops root uptake rather than internal translocation in plants.
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Affiliation(s)
- Fuyu Guo
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Changfeng Ding
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
| | - Zhigao Zhou
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
| | - Gaoxiang Huang
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xingxiang Wang
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China; Ecological Experimental Station of Red Soil, Chinese Academy of Sciences, Yingtan 335211, China.
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956
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Amphiphilic PA-induced three-dimensional graphene macrostructure with enhanced removal of heavy metal ions. J Colloid Interface Sci 2018; 512:853-861. [DOI: 10.1016/j.jcis.2017.10.092] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2017] [Revised: 10/14/2017] [Accepted: 10/24/2017] [Indexed: 11/24/2022]
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957
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Liang JH, Liu PP, Chen Z, Sun GX, Li H. Rapid evaluation of arsenic contamination in paddy soils using field portable X-ray fluorescence spectrometry. J Environ Sci (China) 2018; 64:345-351. [PMID: 29478657 DOI: 10.1016/j.jes.2017.11.020] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2016] [Revised: 08/21/2017] [Accepted: 11/17/2017] [Indexed: 05/24/2023]
Abstract
Arsenic (As) in paddy fields is deteriorating food security and human health through rice ingestion. Rice is the dominant food source of arsenic exposure to half of the world's population. Therefore, an in situ effective method for As risk evaluation in paddy soil is strongly needed to avoid As exposure through rice ingestion. Herein, we developed a rapid analytical methodology for determination of As in plant tissues using field portable X-ray fluorescence spectrometry (FP-XRF). This method was applied to rice roots in order to evaluate the As contamination in paddy soils. The results showed that rice roots with iron plaques were superior to rhizosphere soils for generating FP-XRF signals, especially for field sites with As concentrations lower than the soil detection limit of FP-XRF (30.0mg/kg). Moreover, the strong linear relationships of As concentrations between the rice roots and corresponding leaves and grains proved that the rice root, rather than the soil, is a better predictor of As concentrations in rice grains. The research provides an efficient As monitoring method for As contaminated paddy fields by using wetland plant roots with iron plaques and XRF-based analytical techniques.
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Affiliation(s)
- Jian-Hong Liang
- Key Laboratory of Karst Ecosystem and Treatment of Rocky Desertification, Institute of Karst Geology, Chinese Academy of Geological Sciences, Guilin 541004, China; State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China
| | - Pan-Pan Liu
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China; State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China
| | - Zheng Chen
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; Department of Environmental Science, Xi'an Jiaotong-Liverpool University, Suzhou 215123, China.
| | - Guo-Xin Sun
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China
| | - Hong Li
- College of Urban Construction and Environmental Engineering, Chongqing University, Chongqing 400045, China
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958
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Li R, Liang W, Huang H, Jiang S, Guo D, Li M, Zhang Z, Ali A, Wang JJ. Removal of cadmium(II) cations from an aqueous solution with aminothiourea chitosan strengthened magnetic biochar. J Appl Polym Sci 2018. [DOI: 10.1002/app.46239] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Ronghua Li
- College of Natural Resources and Environment; Northwest A&F University; Yangling Shaanxi 712100 People's Republic of China
| | - Wen Liang
- College of Natural Resources and Environment; Northwest A&F University; Yangling Shaanxi 712100 People's Republic of China
| | - Hui Huang
- College of Natural Resources and Environment; Northwest A&F University; Yangling Shaanxi 712100 People's Republic of China
| | - Shuncheng Jiang
- College of Natural Resources and Environment; Northwest A&F University; Yangling Shaanxi 712100 People's Republic of China
| | - Di Guo
- College of Natural Resources and Environment; Northwest A&F University; Yangling Shaanxi 712100 People's Republic of China
| | - Manlin Li
- Shaanxi Key Laboratory of Natural Products and Chemical Biology, College of Chemistry and Pharmacy; Northwest A&F University; Yangling Shaanxi 712100 People's Republic of China
| | - Zengqiang Zhang
- College of Natural Resources and Environment; Northwest A&F University; Yangling Shaanxi 712100 People's Republic of China
| | - Amajd Ali
- College of Natural Resources and Environment; Northwest A&F University; Yangling Shaanxi 712100 People's Republic of China
| | - Jim J. Wang
- Agricultural Center, School of Plant, Environmental, and Soil Sciences; Louisiana State University; Baton Rouge Louisiana
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959
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Liu R, Guan Y, Chen L, Lian B. Adsorption and Desorption Characteristics of Cd 2+ and Pb 2+ by Micro and Nano-sized Biogenic CaCO 3. Front Microbiol 2018; 9:41. [PMID: 29434577 PMCID: PMC5790784 DOI: 10.3389/fmicb.2018.00041] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2017] [Accepted: 01/09/2018] [Indexed: 11/18/2022] Open
Abstract
The purpose of this study was to elucidate the characteristics and mechanisms of adsorption and desorption for heavy metals by micro and nano-sized biogenic CaCO3 induced by Bacillus subtilis, and the pH effect on adsorption was investigated. The results showed that the adsorption characteristics of Cd2+ and Pb2+ are well described by the Langmuir adsorption isothermal equation, and the maximum adsorption amounts for Cd2+ and Pb2+ were 94.340 and 416.667 mg/g, respectively. The maximum removal efficiencies were 97% for Cd2+, 100% for Pb2+, and the desorption rate was smaller than 3%. Further experiments revealed that the biogenic CaCO3 could maintain its high adsorption capability for heavy metals within wide pH ranges (3-8). The FTIR and XRD results showed that, after the biogenic CaCO3 adsorbed Cd2+ or Pb2+, it did not produce a new phase, which indicated that biogenic CaCO3 and heavy metal ions were governed by a physical adsorption process, and the high adsorptive capacity of biogenic CaCO3 for Cd2+ and Pb2+ were mainly attributed to its large total specific surface area. The findings could improve the state of knowledge about biogenic CaCO3 formation in the environment and its potential roles in the biogeochemical cycles of heavy metals.
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Affiliation(s)
- Renlu Liu
- Jiangsu Key Laboratory for Microbes and Functional Genomics, Jiangsu Engineering and Technology Research Center for Microbiology, College of Life Sciences, Nanjing Normal University, Nanjing, China
| | - Yong Guan
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, China
| | - Liang Chen
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, China
| | - Bin Lian
- Jiangsu Key Laboratory for Microbes and Functional Genomics, Jiangsu Engineering and Technology Research Center for Microbiology, College of Life Sciences, Nanjing Normal University, Nanjing, China
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960
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Bashir S, Salam A, Chhajro MA, Fu Q, Khan MJ, Zhu J, Shaaban M, Kubar KA, Ali U, Hu H. Comparative efficiency of rice husk-derived biochar (RHB) and steel slag (SS) on cadmium (Cd) mobility and its uptake by Chinese cabbage in highly contaminated soil. INTERNATIONAL JOURNAL OF PHYTOREMEDIATION 2018; 20:1221-1228. [PMID: 31274024 DOI: 10.1080/15226514.2018.1448364] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Cadmium (Cd) contamination in red soil has been considered as a severe threat due to its toxic effects on plants and food security. This study aims to evaluate the comparative efficiency of rice husk-derived biochar (RHB) and steel slag (SS) metal stabilizer on decreasing Cd mobility and bioavailability to Chinese cabbage grown on acidic contaminated red soil. Several extraction techniques: a sequential extraction procedure, the European Community Bureau of Reference, toxicity characteristics leaching procedure, ammonium nitrate, and simple bioaccessibility extraction test were used to measure Cd mobility after amelioration of the investigated soil. The results indicated that application of stabilizer significantly increased soil chemical properties including soil pH, cation exchange capacity, nutrients, and organic matter. The soluble portion of Cd in soil was significantly decreased by 17.6-31.2% and 7.8-11.7% for RHB and SS at 1.5% and 3% application rate, respectively. Moreover, Cd bioaccessibility was significantly declined by 37.08% with RHB and 11.3% with SS at 3% rate. Inlcorporation of RHB at 3% can effectively immobilize Cd and thereby, reduce its phytoavailability to cabbage in Cd-contaminated soil to mitigate food security risks.
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Affiliation(s)
- Saqib Bashir
- a Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtse River) , Ministry of Agriculture, College of Resources and Environment, Huazhong Agricultural University , Wuhan , China
| | - Abdus Salam
- a Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtse River) , Ministry of Agriculture, College of Resources and Environment, Huazhong Agricultural University , Wuhan , China
| | | | - Qingling Fu
- a Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtse River) , Ministry of Agriculture, College of Resources and Environment, Huazhong Agricultural University , Wuhan , China
| | - Muhammad Jamal Khan
- c School of Agriculture and Food Science , Faculty of Veterinary and Agricultural Sciences, Dookie Campus, The University of Melbourne , Victoria , Australia
| | - Jun Zhu
- a Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtse River) , Ministry of Agriculture, College of Resources and Environment, Huazhong Agricultural University , Wuhan , China
| | - Muhammad Shaaban
- a Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtse River) , Ministry of Agriculture, College of Resources and Environment, Huazhong Agricultural University , Wuhan , China
| | - Kashif Ali Kubar
- a Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtse River) , Ministry of Agriculture, College of Resources and Environment, Huazhong Agricultural University , Wuhan , China
| | - Umeed Ali
- a Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtse River) , Ministry of Agriculture, College of Resources and Environment, Huazhong Agricultural University , Wuhan , China
| | - Hongqing Hu
- a Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtse River) , Ministry of Agriculture, College of Resources and Environment, Huazhong Agricultural University , Wuhan , China
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961
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Dai W, Ke X, Li Z, Gao M, Wu L, Chiristie P, Luo Y. Antioxidant enzyme activities of Folsomia candida and avoidance of soil metal contamination. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:2889-2898. [PMID: 29143931 DOI: 10.1007/s11356-017-0489-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Accepted: 10/16/2017] [Indexed: 06/07/2023]
Abstract
Induction of the antioxidant enzymes catalase (CAT), peroxidase (POD) and superoxide dismutase (SOD) and the avoidance of potentially toxic metals in soil by Folsomia candida were investigated. Both laboratory-spiked and field-polluted agricultural soils were used. Cadmium (Cd) concentrations in body tissues, animal avoidance behaviour and physico-chemical properties of the field soils were also determined. In laboratory Cd-spiked soils, the CAT and SOD activities in the Cd treatments were 71.1-94.7 and 1.31-4.55 times higher than in the control, respectively. In field-polluted agricultural soils, the CAT and POD activities generally increased with increasing pollution index (PI Nemerow ) of soil Cd, Cu, Pb and Zn. The CAT, POD and SOD activities at different PI Nemerow were 65.7-128, 30.1-180 and 36.5-95.8% higher than in the control, respectively. In line with the enzyme activities, Cd concentrations in the animal bodies were 8.31-15.1 and 3.21-10.0 times higher than in the control in spiked and field-polluted soils, respectively. Avoidance behaviour also increased with increasing metal concentrations in both soils. The effects of metals on CAT, POD or SOD activity were influenced by soil properties such as soil texture and pH. These results indicate that the antioxidant enzymes activities of F. candida can be induced by heavy metals and potentially used to assess the toxicity, and also that soil properties must be considered in the analysis of enzyme activities in different types of field soils.
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Affiliation(s)
- Wencai Dai
- College of Resources and Environment, Southwest University, Chongqing, 400716, China
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China
| | - Xin Ke
- Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, 200032, China.
| | - Zhu Li
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China
| | - Ming Gao
- College of Resources and Environment, Southwest University, Chongqing, 400716, China
| | - Longhua Wu
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China.
| | - Peter Chiristie
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China
| | - Yongming Luo
- College of Resources and Environment, Southwest University, Chongqing, 400716, China
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962
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Zhou T, Zhu D, Wu L, Xing W, Luo Y, Christie P. Repeated phytoextraction of metal contaminated calcareous soil by hyperaccumulator Sedum plumbizincicola. INTERNATIONAL JOURNAL OF PHYTOREMEDIATION 2018; 20:1243-1249. [PMID: 29843530 DOI: 10.1080/15226514.2016.1156641] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Most studies on the phytoextraction of cadmium (Cd) and zinc (Zn) by the hyperaccumulator Sedum plumbizincicola (S. plumbizincicola) have been conducted in metal contaminated acidic and neutral soils. However, little information is available on phytoremediation of calcareous soils. Two experiments were conducted to investigate the phytoextraction efficiency of S. plumbizincicola in a contaminated calcareous soil in He'nan province, north China. In a field experiment there was no significant decrease in shoot biomass production or metal (Cd and Zn) concentration in the shoots after three successive repeated phytoextractions. Repeated phytoextraction had no significant effect on the percentage distribution of Cd or Zn fractions in the soil even though the soil total Cd and Zn concentrations decreased by 32.8 and 19.7%, respectively. In a pot experiment the shoot biomass production and Zn and Cd uptake by S. plumbizincicola increased significantly with growth in metal contaminated calcareous soil amended with organic fertilizer, perlite and vermiculite. The results indicate that S. plumbizincicola can maintain sustainable uptake of Cd and Zn from the calcareous soil and enhancement of soil fertility and structure will significantly increase the phytoextraction efficiency.
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Affiliation(s)
- Tong Zhou
- a Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences , Nanjing , China
| | - Dong Zhu
- a Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences , Nanjing , China
| | - Longhua Wu
- a Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences , Nanjing , China
| | - Weiqin Xing
- b School of Chemistry and Chemical Engineering, Henan University of Technology , Zhengzhou , China
| | - Yongming Luo
- a Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences , Nanjing , China
- c Key Laboratory of Coastal Zone Environmental Processes, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences , Yantai , China
| | - Peter Christie
- a Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences , Nanjing , China
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963
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Zhou T, Wu L, Luo Y, Christie P. Effects of organic matter fraction and compositional changes on distribution of cadmium and zinc in long-term polluted paddy soils. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2018; 232:514-522. [PMID: 28987570 DOI: 10.1016/j.envpol.2017.09.081] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2017] [Revised: 08/09/2017] [Accepted: 09/25/2017] [Indexed: 06/07/2023]
Abstract
Soil particulate organic matter (POM) has rapid turnover and metal enrichment, but the interactions between organic matter (OM) and metals have not been well studied. The present study aimed to investigate changes in the OM concentration and composition of the POM fraction and their corresponding effects on metal distribution and extractability in long-term polluted paddy soils. Soil 2000-53 μm POM size fractions had higher contents of C-H and C=O bonds, C-H/C=O ratios and concentrations of fulvic acid (FA), humic acid (HA), cadmium (Cd) and zinc (Zn) than the bulk soils. Cadmium and Zn stocks in soil POM fractions were 24.5-27.9% and 7.12-16.7%, respectively, and were more readily EDTA-extractable. Compared with the control soil, the 2000-250 μm POM size fractions had higher organic carbon concentrations and C/N ratios in the polluted soils. However, there were no significant differences in the contents in C-H and C=O bonds or C-H/C=O ratios of POM fractions among the control, slightly and highly polluted soils. In accordance with the lower contents of C=O bonds and FA and HA concentrations, the Cd and Zn concentrations in 250-53 μm POM size fractions were lower than those in 2000-250 μm POM size fractions. Enrichment of Cd in POM fractions increased with increasing soil pollution level. These results support the view that changes in the OM concentration and the size and composition of POM fractions play a key role in determining the distribution of Cd and Zn in paddy soils.
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Affiliation(s)
- Tong Zhou
- 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.
| | - Yongming Luo
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China; Key Laboratory of Coastal Zone Environmental Processes, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China
| | - Peter Christie
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
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964
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Xu C, Chen HX, Xiang Q, Zhu HH, Wang S, Zhu QH, Huang DY, Zhang YZ. Effect of peanut shell and wheat straw biochar on the availability of Cd and Pb in a soil-rice (Oryza sativa L.) system. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:1147-1156. [PMID: 29079982 DOI: 10.1007/s11356-017-0495-z] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2017] [Accepted: 10/16/2017] [Indexed: 06/07/2023]
Abstract
Soil amendments, such as biochar, have been used to enhance the immobilization of heavy metals in contaminated soil. A pot experiment was conducted to immobilize the available cadmium (Cd) and lead (Pb) in soil using peanut shell biochar (PBC) and wheat straw biochar (WBC), and to observe the accumulation of these heavy metals in rice (Oryza sativa L.). The application of PBC and WBC led to significantly higher pH, soil organic carbon (SOC), and cation exchange capacity (CEC) in paddy soil, while the content of MgCl2-extractable Cd and Pb was lower than that of untreated soil. MgCl2-extractable Cd and Pb showed significant negative correlations with pH, SOC, and CEC (p < 0.01). The application of 5% biochar to contaminated paddy soil led to reductions of 40.4-45.7 and 68.6-79.0%, respectively, in the content of MgCl2-extractable Cd and Pb. PBC more effectively immobilized Cd and Pb than WBC. Sequential chemical extractions revealed that biochar induced the transformation of the acid-soluble fraction of Cd to oxidizable and residual fractions, and the acid-soluble fraction of Pb to reducible and residual fractions. PBC and WBC clearly inhibited the uptake and accumulation of Cd and Pb in rice plants. Specially, when compared to the corresponding concentrations in rice grown in control soils, 5% PBC addition lowered Cd and Pb concentrations in grains by 22.9 and 12.2%, respectively, while WBC addition lowered them by 29.1 and 15.0%, respectively. Compared to Pb content, Cd content was reduced to a greater extent in grain by PBC and WBC. These results suggest that biochar application is effective for immobilizing Cd and Pb in contaminated paddy soil, and reduces their bioavailability in rice. Biochar could be used as a soil amendment for the remediation of soils contaminated with heavy metals.
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Affiliation(s)
- Chao Xu
- Key Laboratory for Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agricultural, Chinese Academy of Sciences, Changsha, 410125, China.
- College of Resources and Environment, Hunan Agricultural University, Changsha, 410128, China.
| | - Hao-Xiang Chen
- College of Natural Resources and Environment, South China Agricultural University, Guangzhou, 510642, China
| | - Qian Xiang
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 10085, China
| | - Han-Hua Zhu
- Key Laboratory for Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agricultural, Chinese Academy of Sciences, Changsha, 410125, China
| | - Shuai Wang
- Key Laboratory for Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agricultural, Chinese Academy of Sciences, Changsha, 410125, China
| | - Qi-Hong Zhu
- Key Laboratory for Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agricultural, Chinese Academy of Sciences, Changsha, 410125, China
| | - Dao-You Huang
- Key Laboratory for Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agricultural, Chinese Academy of Sciences, Changsha, 410125, China
| | - Yang-Zhu Zhang
- College of Resources and Environment, Hunan Agricultural University, Changsha, 410128, China.
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965
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Steffan J, Brevik E, Burgess L, Cerdà A. The effect of soil on human health: an overview. EUROPEAN JOURNAL OF SOIL SCIENCE 2018; 69:159-171. [PMID: 29430209 PMCID: PMC5800787 DOI: 10.1111/ejss.12451] [Citation(s) in RCA: 79] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Soil has a considerable effect on human health, whether those effects are positive or negative, direct or indirect. Soil is an important source of nutrients in our food supply and medicines such as antibiotics. However, nutrient imbalances and the presence of human pathogens in the soil biological community can cause negative effects on health. There are also many locations where various elements or chemical compounds are found in soil at toxic levels, because of either natural conditions or anthropogenic activities. The soil of urban environments has received increased attention in the last few years, and they too pose a number of human health questions and challenges. Concepts such as soil security may provide a framework within which issues on soil and human health can be investigated using interdisciplinary and transdisciplinary approaches. It will take the contributions of experts in several different scientific, medical and social science fields to address fully soil and human health issues. Although much progress was made in understanding links between soil and human health over the last century, there is still much that we do not know about the complex interactions between them. Therefore, there is still a considerable need for research in this important area.
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Affiliation(s)
- J.J. Steffan
- Department of Natural Sciences, Dickinson State University, Dickinson, ND, USA
- Department of Agriculture and Technical Studies, Dickinson State University, Dickinson, ND, USA
| | - E.C. Brevik
- Department of Natural Sciences, Dickinson State University, Dickinson, ND, USA
| | - L.C. Burgess
- Department of Natural Sciences, Dickinson State University, Dickinson, ND, USA
| | - A. Cerdà
- Department of Geography, Universitat de València, Valencia, Spain
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966
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Desjardins D, Brereton NJB, Marchand L, Brisson J, Pitre FE, Labrecque M. Complementarity of three distinctive phytoremediation crops for multiple-trace element contaminated soil. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 610-611:1428-1438. [PMID: 28873664 DOI: 10.1016/j.scitotenv.2017.08.196] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2017] [Revised: 08/17/2017] [Accepted: 08/18/2017] [Indexed: 06/07/2023]
Abstract
Trace element (TE) contaminated land represents an important risk to the environment and to human health worldwide. These soils usually contain a variety of TEs which can be a challenge for plant-based remediation options. As individual plant species often possess a limited range of TE remediation abilities, functional complementarity principles could be of value for remediation of soil contaminated by multiple TEs using assemblages of species. Monocultures and polycultures of Festuca arundinacea, Medicago sativa and Salix miyabeana were grown for 4months in aged-polluted soil contaminated by Ag, As, Cd, Cr, Cu, Pb, Se and Zn. Above and belowground biomass yields, root surface area (RSA) and TE tissue concentrations were recorded. In monoculture, the greatest aboveground biomass was produced by S. miyabeana (S), the greatest belowground biomass was from M. sativa (M) and F. arundinacea (F) produced the highest RSA. The polycultures of F+M, F+S and F+M+S produced among the highest values across all three traits. F. arundinacea monoculture and its combination with S. miyabeana (F+S) accumulated the highest amounts of total TEs in belowground tissues, whereas the most effective combination (or monoculture) for aboveground extraction yields varied depending on the TE considered. The crops demonstrated complementarity in their biomass allocation patterns as well as facilitative interactions. When considering contamination with a particular TE, the best phytomanagement approach could include a specific monoculture option; however, when above and belowground biomass allocation patterns, TE-remediation abilities as well as nitrogen accessibility are considered, co-cropping all three species (F+M+S) was the most robust scenario for remediation of multiple-TE contaminated land. By more effectively addressing a diversity of TE, species assemblage approaches could represent an important advancement towards enabling the use of plants to address contaminated-land issues worldwide.
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Affiliation(s)
- Dominic Desjardins
- Institut de recherche en biologie végétale, Université de Montréal, 4101 Sherbrooke Est, Montréal, QC H1X 2B2, Canada
| | - Nicholas J B Brereton
- Institut de recherche en biologie végétale, Université de Montréal, 4101 Sherbrooke Est, Montréal, QC H1X 2B2, Canada.
| | - Lilian Marchand
- INRA, UMR 1202 BIOGECO, 69 route d'Arcachon, FR-33612 Cestas cedex, France; University of Bordeaux, UMR 1202 BIOGECO, Bat B2, Allée Geoffroy St-Hilaire, CS50023, FR-33615 Pessac cedex, France
| | - Jacques Brisson
- Institut de recherche en biologie végétale, Université de Montréal, 4101 Sherbrooke Est, Montréal, QC H1X 2B2, Canada
| | - Frédéric E Pitre
- Institut de recherche en biologie végétale, Université de Montréal, 4101 Sherbrooke Est, Montréal, QC H1X 2B2, Canada; Montreal Botanical Garden, 4101 Sherbrooke Est, Montréal, QC H1X 2B2, Canada
| | - Michel Labrecque
- Institut de recherche en biologie végétale, Université de Montréal, 4101 Sherbrooke Est, Montréal, QC H1X 2B2, Canada; Montreal Botanical Garden, 4101 Sherbrooke Est, Montréal, QC H1X 2B2, Canada
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967
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Wan LY, Qi SS, Dai ZC, Zou CB, Song YG, Hu ZY, Zhu B, Du DL. Growth responses of Canada goldenrod (Solidago canadensis L.) to increased nitrogen supply correlate with bioavailability of insoluble phosphorus source. Ecol Res 2017. [DOI: 10.1007/s11284-017-1552-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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968
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Yin X, Xu Y, Huang R, Huang Q, Xie Z, Cai Y, Liang X. Remediation mechanisms for Cd-contaminated soil using natural sepiolite at the field scale. ENVIRONMENTAL SCIENCE. PROCESSES & IMPACTS 2017; 19:1563-1570. [PMID: 29177306 DOI: 10.1039/c7em00262a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Remediation of heavy metal polluted agricultural soil is essential for human health and ecological safety and remediation mechanisms at the microscopic level are vital for their large-scale utilization. In this study, natural sepiolite was employed as an immobilization agent for in situ field-scale remediation of Cd-contaminated paddy soil and the remediation mechanisms were investigated in terms of soil chemistry and plant physiology. Natural sepiolite had a significant immobilization effect for bioavailable Cd contents in paddy soil, and consequently could lower the Cd concentrations of brown rice, husk, straw, and roots of rice plants by 54.7-73.7%, 44.0-62.5%, 26.5-67.2%, and 36.7-46.7%, respectively. Regarding soil chemistry, natural sepiolite increased the soil pH values and shifted the zeta potentials of soil particles to be more negative, enhancing the fixation or sorption of Cd on soil particles, and resulted in the reduction of HCl and DTPA extractable Cd concentrations in paddy soil. Natural sepiolite neither enhanced nor inhibited iron plaques on the rice root surface, but did change the chemical environments of Fe and S in rice root. Natural sepiolite improved the activities of antioxidant enzymes and enhanced the total antioxidant capacity to alleviate the stress of Cd. It also promotes the synthesis of GSH and NPT to complete the detoxification. In general, the remediation mechanisms of natural sepiolite for the Cd pollutant in paddy soil could be summarized as the collective effects of soil chemistry and plant physiology.
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Affiliation(s)
- Xiuling Yin
- Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, No. 2699, Qianjin Street, Chaoyang District, Changchun 130021, China.
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969
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Ding S, Ma C, Shi W, Liu W, Lu Y, Liu Q, Luo ZB. Exogenous glutathione enhances cadmium accumulation and alleviates its toxicity in Populus × canescens. TREE PHYSIOLOGY 2017; 37:1697-1712. [PMID: 29121354 DOI: 10.1093/treephys/tpx132] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2017] [Accepted: 09/24/2017] [Indexed: 05/25/2023]
Abstract
Glutathione (GSH) plays an important role in cadmium (Cd) tolerance in woody plants, but the underlying mechanisms remain largely unknown. To elucidate the physiological and transcriptional regulation mechanisms of GSH-mediated Cd tolerance in woody plants, we exposed Populus × canescens (Ait.) Smith saplings to either 0 or 75 μM Cd together with one of three external GSH levels. Glutathione treatments include buthionine sulfoximine (BSO, an inhibitor of GSH biosynthesis), no external GSH and exogenous GSH. External GSH resulted in higher Cd2+ uptake rate in the roots, greater Cd amount in poplars, lower Cd-induced H2O2 levels in the roots, and higher contents of endogenous GSH in Cd-treated roots and leaves. Furthermore, external GSH led to upregulated transcript levels of several genes including zinc/iron regulated transporter related protein 6.2 (ZIP6.2) and natural resistance-associated macrophage protein 1.3 (NRAMP1.3), which probably take part in Cd uptake, glutathione synthetase 2 (GS2) implicated in Cd detoxification, metal tolerance protein 1 (MTP1) and ATP-binding cassette transporter C3 (ABCC3) involved in Cd vacuolar accumulation in the roots, γ-glutamylcysteine synthetase (ECS) and phytochelatin synthetase family protein 1 (PCS1) involved in Cd detoxification, and oligopeptide transporter 7 (OPT7) probably implicated in Cd detoxification in the leaves of Cd-exposed P. × canescens. In contrast, BSO often displayed the opposite effects on Cd-triggered physiological and transcriptional regulation responses in poplars. These results suggest that exogenous GSH can enhance Cd accumulation and alleviate its toxicity in poplars. This is probably attributed to external-GSH-induced higher net Cd2+ influx in the roots, greater Cd accumulation in aerial parts, stronger scavenging of reactive oxygen species, and transcriptional overexpression of several genes involved in Cd uptake, detoxification and accumulation.
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Affiliation(s)
- Shen Ding
- College of Forestry, Northwest A&F University, Yangling, Shaanxi 712100, People's Republic of China
| | - Chaofeng Ma
- College of Forestry, Northwest A&F University, Yangling, Shaanxi 712100, People's Republic of China
| | - Wenguang Shi
- State Key Laboratory of Tree Genetics and Breeding, Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091, China
| | - Wenzhe Liu
- State Key Laboratory of Tree Genetics and Breeding, Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091, China
| | - Yan Lu
- State Key Laboratory of Tree Genetics and Breeding, Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091, China
| | - Qifeng Liu
- State Key Laboratory of Tree Genetics and Breeding, Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091, China
| | - Zhi-Bin Luo
- State Key Laboratory of Tree Genetics and Breeding, Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091, China
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970
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Fang L, Liu Y, Tian H, Chen H, Wang Y, Huang M. Proper land use for heavy metal-polluted soil based on enzyme activity analysis around a Pb-Zn mine in Feng County, China. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:28152-28164. [PMID: 29018994 DOI: 10.1007/s11356-017-0308-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2017] [Accepted: 09/21/2017] [Indexed: 06/07/2023]
Abstract
Enzymes in the soil are useful for assessing heavy metal soil pollution. We analyzed the activity of a number of enzymes, including urease, protease, catalase, and alkaline phosphatase, in three types of land (farmland, woodland, and grassland) to evaluate soil pollution by heavy metals (Pb, Zn, and Cd). Our results showed that the tested soil was polluted by a combination of Pb, Zn, and Cd, but the primary pollutant was Cd. An ecological dose analysis demonstrated that urease was the most sensitive enzyme to Pb and Cd in the farmland, and catalase and phosphatase were the most sensitive enzymes to Pb, Zn, and Cd in the woodland and grassland. The ecological risk of Cd (E Cd ) was the smallest in all three types of land, suggesting that Cd was the major metal inhibiting enzyme activity. Electrical conductivity (EC) was shown to be a negative regulator, while nitrogen, phosphorus, and clay contents were positive regulators of soil enzyme activity. The total enzyme index (TEI) inhibition rates in the woodland were 22.2 and 38.6% under moderate and heavy pollution, respectively, which were lower than those of the other two types of land. Therefore, woodlands might be the optimum land use choice in relieving heavy metal pollution. Taken together, this study identified the key metal pollutant inhibiting soil enzyme activity and suitable land use patterns around typical metal mine. These results provide possible improvement strategies to the phytomanagement of metal-contaminated land around world.
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Affiliation(s)
- Linchuan Fang
- State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A&F University, Yangling, 712100, China
| | - Yuqing Liu
- College of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan, Hubei, 430070, China
| | - Haixia Tian
- State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A&F University, Yangling, 712100, China
| | - Hansong Chen
- Xingzhi College, Zhejiang Normal University, Jinhua, Zhejiang Province, 321004, China
| | - Yunqiang Wang
- State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, Shaanxi, 710061, China
| | - Min Huang
- College of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan, Hubei, 430070, China.
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971
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Duan G, Shao G, Tang Z, Chen H, Wang B, Tang Z, Yang Y, Liu Y, Zhao FJ. Genotypic and Environmental Variations in Grain Cadmium and Arsenic Concentrations Among a Panel of High Yielding Rice Cultivars. RICE (NEW YORK, N.Y.) 2017; 10:9. [PMID: 28353179 PMCID: PMC5371165 DOI: 10.1186/s12284-017-0149-2] [Citation(s) in RCA: 82] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2016] [Accepted: 03/17/2017] [Indexed: 05/18/2023]
Abstract
BACKGROUND Rice is a major dietary source of cadmium (Cd) and arsenic (As) for populations consuming rice as the staple food. Excessive Cd and As accumulation in rice grain is of great concern worldwide, especially in South China where soil contamination with heavy metals and metalloids is widespread. It is important to reduce Cd and As accumulation in rice grain through selection and breeding of cultivars accumulating low levels of Cd or As. RESULTS To assess the genetic and environmental variations in the concentrations of Cd and As in rice grains, 471 locally adapted high-yielding rice cultivars were grown at three moderately contaminated sites in South China for two years. Cadmium and As concentrations in brown rice varied by 10 - 32 and 2.5 - 4 fold, respectively. Genotype (G), environment (E) and G x E interactions were highly significant factors explaining the variations. Brown rice Cd concentration was found to correlate positively with the heading date among different cultivars, whereas As concentration and heading date correlated negatively. There was a significant and negative correlation between grain Cd and As concentrations. CONCLUSIONS Eight and 6 rice cultivars were identified as stable low accumulators of Cd and As, respectively, based on the multiple site and season trials. These cultivars are likely to be compliant with the grain Cd or As limits of the Chinese Food Safety Standards when grown in moderately contaminated paddy soils in South China.
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Affiliation(s)
- Guilan Duan
- State Key Laboratory of Urban and Regional Ecology, Research Centre for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China
| | - Guosheng Shao
- Chinese National Rice Research Institute, Hangzhou, 310006, China
| | - Zhong Tang
- 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
| | - Boxun Wang
- State Key Laboratory of Urban and Regional Ecology, Research Centre for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China
| | - Zhu Tang
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Yuping Yang
- State Key Laboratory of Urban and Regional Ecology, Research Centre for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China
| | - Yuechuan Liu
- Youxian Agricultural Bureau of Hunan Province, Hunan, 412300, China
| | - 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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972
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LAHORI AH, GUO Z, ZHANG Z, LI R, MAHAR A, AWASTHI MK, SHEN F, SIAL TA, KUMBHAR F, WANG P, JIANG S. Use of Biochar as an Amendment for Remediation of Heavy Metal-Contaminated Soils: Prospects and Challenges. PEDOSPHERE 2017; 27:991-1014. [DOI: 10.1016/s1002-0160(17)60490-9] [Citation(s) in RCA: 67] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/20/2023]
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973
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Li B, Peng L, Wei D, Lei M, Liu B, Lin Y, Li Z, Gu J. Enhanced flocculation and sedimentation of trace cadmium from irrigation water using phosphoric fertilizer. THE SCIENCE OF THE TOTAL ENVIRONMENT 2017; 601-602:485-492. [PMID: 28575827 DOI: 10.1016/j.scitotenv.2017.05.160] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2017] [Revised: 05/16/2017] [Accepted: 05/17/2017] [Indexed: 06/07/2023]
Abstract
Suspended substrate (SS) in natural waters controls the interaction, transportation, and biological effects of heavy metals in water bodies. The large amount of cadmium (Cd) carried by SS is an important source of Cd pollution in irrigation water. In this study, a novel procedure to remove trace Cd coexisting with SS from irrigation water by fertilizer flocculation was investigated. Four common fertilizers (K2HPO4, (NH4)2HPO4, KH2PO4, and K2SO4) were used as flocculants. Batch experiments with various fertilizers revealed that the removal efficiency followed the order: K2HPO4>(NH4)2HPO4>KH2PO4>K2SO4. When levels of K2HPO4 higher than 0.75g/L were applied, the total Cd decreased from 20 to 3.8μg/L after 12h of flocculation, i.e., the removal efficiency reached 80%. The mechanism analysis(Zeta potential, multi-element analysis) results demonstrated that the aggregation of SS and its sedimentation by K2HPO4 were due to the combined effect of the oxidation of Fe2+ to Fe3+ and cation binding behavior towards SS, as a result of charge neutralization and electric double layer compression. This method of Cd removal from irrigation water is simple and has the potential to be applied in agricultural production.
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Affiliation(s)
- Bingyu Li
- Department of Environmental Science & Engineering, Hunan Agricultural University, Changsha 410128, PR China
| | - Liang Peng
- Department of Environmental Science & Engineering, Hunan Agricultural University, Changsha 410128, PR China.
| | - Dongning Wei
- Department of Environmental Science & Engineering, Hunan Agricultural University, Changsha 410128, PR China
| | - Ming Lei
- Department of Environmental Science & Engineering, Hunan Agricultural University, Changsha 410128, PR China
| | - Bin Liu
- Department of Environmental Science & Engineering, Hunan Agricultural University, Changsha 410128, PR China
| | - Yiqing Lin
- Department of Environmental Science & Engineering, Hunan Agricultural University, Changsha 410128, PR China
| | - Zhiyi Li
- Department of Environmental Science & Engineering, Hunan Agricultural University, Changsha 410128, PR China
| | - Jidong Gu
- Laboratory of Environmental Microbiology and Toxicology, School of Biological Sciences, The University of Hong Kong, Pokfulam Road, Hong Kong, SAR, PR China
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974
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Beiyuan J, Li JS, Tsang DCW, Wang L, Poon CS, Li XD, Fendorf S. Fate of arsenic before and after chemical-enhanced washing of an arsenic-containing soil in Hong Kong. THE SCIENCE OF THE TOTAL ENVIRONMENT 2017; 599-600:679-688. [PMID: 28494293 DOI: 10.1016/j.scitotenv.2017.04.208] [Citation(s) in RCA: 71] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2017] [Revised: 04/25/2017] [Accepted: 04/27/2017] [Indexed: 06/07/2023]
Abstract
This study evaluated the feasibility of 2-h chemical-enhanced washing of As-containing soil resulting from geogenic sources in Hong Kong and the fate of As before and after remediation. The soil morphology and As speciation in soil was elucidated by scanning electron microscopy with energy dispersive X-ray spectroscopy, X-ray diffractometer, X-ray photoelectron spectroscopy, and X-ray absorption spectroscopy. Integrated analysis of the results suggests that the As (>90%) resides predominantly as arsenate bound to ferric iron oxides, with a minor contribution (<10%) from an AsIII-sulphide phase. This accounts for the marginal leachability, mobility, and bioaccessibility of geogenic As in the untreated soil despite its high concentration. Among the five types of reagents (organic ligands, reductants, alkaline solvents, inorganic acids, and chelants), only dithionite-citrate-bicarbonate method and alkaline solvents (NaOH and Na2CO3) extracted 37-78% and 26-42% of the As by mineral dissolution. However, these extraction methods notably increased the leachability, mobility, and bioaccessibility of remaining As after soil washing, suggesting that a significant proportion of newly released As is prone to re-adsorption onto the soil surface and becomes highly mobile and bioaccessible. While inorganic acids and chelating agents had marginal effects on the fate of remaining As, organic ligands (citrate, oxalate, or pyrophosphate) probably destabilized the bonding of geogenic As and increased its mobility/bioaccessibility despite marginal extraction. The applicability of chemical extraction of geogenic As is questionable regardless of chemical agents, thus proper management of the As-containing soil by containment or physical encapsulation may be considered before land development.
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Affiliation(s)
- Jingzi Beiyuan
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
| | - Jiang-Shan Li
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
| | - Daniel C W Tsang
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China.
| | - Lei Wang
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
| | - Chi Sun Poon
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
| | - Xiang-Dong Li
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
| | - Scott Fendorf
- Earth System Science Department, Stanford University, Stanford, California 94305, United States
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975
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Liu Z, Wang L, Wang C, Sun S, Qin L, An Y, Xing Y, Sun H. Effect of corrosion inhibitor benzotriazole on the uptake and translocation of Cd in rice (Oryza sativa L.) under different exposure conditions. CHEMOSPHERE 2017; 186:24-30. [PMID: 28763635 DOI: 10.1016/j.chemosphere.2017.07.095] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2017] [Revised: 07/11/2017] [Accepted: 07/17/2017] [Indexed: 06/07/2023]
Abstract
Emerging contaminants that can complex with heavy metals might affect the speciation of coexisting metals and result in different ecological risks. As a widely used metal corrosion inhibitor, 1H-benzotriazole (BTR) is frequently detected in the environments, sometimes at very high levels. In this study, rice (Oryza sativa L.) was used to assess the ecological risk of combined exposure to cadmium (Cd) and BTR in plants and discuss the potential effects of exposure sequence on the uptake and translocation of Cd under hydroponic culture. In the combined exposure treatments, Cd concentration in rice significantly decreased when the molar ratio of BTR to Cd exceeded 1, while the oxidative damage of root was alleviated. In the sequential exposure treatments, an exposure to BTR accelerated the release of preabsorbed Cd from seedlings to the environment and increased the transport of Cd from the roots to shoots at high BTR concentrations. This demonstrates that the combined pollution effect of Cd and BTR is present not only in the environment but also in plants. With the decrease in Cd concentration in the roots, the electrolytic leakages from the roots also decreased, indicating that root damage repair was induced by the subsequent BTR exposure. BTR was mainly accumulated in the seedling roots. Preabsorbed BTR significantly increased Cd concentration in the roots of rice seedlings but inhibited Cd translocation from the roots to shoots of the rice seedlings.
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Affiliation(s)
- Zhen Liu
- Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria/Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Nankai University, Tianjin 300071, China
| | - Lei Wang
- Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria/Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Nankai University, Tianjin 300071, China.
| | - Chenye Wang
- Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria/Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Nankai University, Tianjin 300071, China
| | - Shujuan Sun
- Shandong Agricultural University, Tai'an 271018, China
| | - Li Qin
- Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin, 300191, China
| | - Yi An
- Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin, 300191, China
| | - Yanshuai Xing
- Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria/Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Nankai University, Tianjin 300071, China
| | - Hongwen Sun
- Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria/Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Nankai University, Tianjin 300071, China
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976
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Wang X, Ji D, Chen X, Ma Y, Yang J, Ma J, Li X. Extended biotic ligand model for predicting combined Cu-Zn toxicity to wheat (Triticum aestivum L.): Incorporating the effects of concentration ratio, major cations and pH. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2017; 230:210-217. [PMID: 28688297 DOI: 10.1016/j.envpol.2017.06.037] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2016] [Revised: 05/19/2017] [Accepted: 06/13/2017] [Indexed: 06/07/2023]
Abstract
Current risk assessment models for metals such as the biotic ligand model (BLM) are usually applied to individual metals, yet toxic metals are rarely found singly in the environment. In the present research, the toxicity of Cu and Zn alone and together were studied in wheat (Triticum aestivum L.) using different Ca2+ and Mg2+ concentrations, pH levels and Zn:Cu concentration ratios. The aim of the study was to better understand the toxicity effects of these two metals using BLMs and toxic units (TUs) from single and combined metal toxicity data. The results of single-metal toxicity tests showed that toxicity of Cu and Zn tended to decrease with increasing Ca2+ or Mg2+ concentrations, and that the effects of pH on Cu and Zn toxicity were related not only to free Cu2+ and Zn2+ activity, respectively, but also to other inorganic metal complex species. For the metal mixture, Cu-Zn interactions based on free ion activities were primarily additive for the different Ca2+ and Mg2+ concentrations and levels of pH. The toxicity data of individual metals derived by the BLM, which incorporated Ca2+ and Mg2+ competition and toxicity of inorganic metal complexes in a single-metal toxicity assessment, could predict the combined toxicity as a function of TU. There was good performance between the predicted and observed effects (root mean square error [RMSE] = 7.15, R2 = 0.97) compared to that using a TU method with a model based on free ion activity (RMSE = 14.29, R2 = 0.86). The overall findings indicated that bioavailability models that include those biochemistry processes may accurately predict the toxicity of metal mixtures.
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Affiliation(s)
- Xuedong Wang
- The Key Lab of Resource Environment and GIS, College of Resource Environment and Tourism, Capital Normal University, 105 North Road of Xisanhuan, Beijing 100048, China
| | - Dongxue Ji
- The Key Lab of Resource Environment and GIS, College of Resource Environment and Tourism, Capital Normal University, 105 North Road of Xisanhuan, Beijing 100048, China
| | - Xiaolin Chen
- The Key Lab of Resource Environment and GIS, College of Resource Environment and Tourism, Capital Normal University, 105 North Road of Xisanhuan, Beijing 100048, China
| | - Yibing Ma
- Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, 12 Southern Street of Zhongguancun, Beijing 100081, China; School of Resources and Environment, University of Jinan, Jinan, Shandong 250022, China.
| | - Junxing Yang
- Center for Environmental Remediation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
| | | | - Xiaoxiu Li
- The Key Lab of Resource Environment and GIS, College of Resource Environment and Tourism, Capital Normal University, 105 North Road of Xisanhuan, Beijing 100048, China
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977
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Yin D, Wang X, Peng B, Tan C, Ma LQ. Effect of biochar and Fe-biochar on Cd and As mobility and transfer in soil-rice system. CHEMOSPHERE 2017; 186:928-937. [PMID: 28830065 DOI: 10.1016/j.chemosphere.2017.07.126] [Citation(s) in RCA: 128] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2017] [Revised: 07/12/2017] [Accepted: 07/25/2017] [Indexed: 06/07/2023]
Abstract
In this study, the effects of biochar derived from rice-straw (biochar) and iron-impregnated biochar (Fe-biochar) on Cd and As mobility in rice rhizosphere and transfer from soil to rice were investigated with different application rates. 1-3% biochar reduced porewater Cd in rhizosphere but elevated soluble As, resulting in 49-68% and 26-49% reduction in the root and grain Cd, with a simultaneous increase in root As. Unlike biochar, 0.5% Fe-biochar decreased porewater As throughout rice growth, resulting in reduced root As, which, however, increased Cd uptake by root. Biochar-induced soil As mobilization was probably through competitive desorption and Fe-biochar-induced soil Cd mobilization was probably via soil acidification. The results suggested that biochar and Fe-biochar was effective in reducing Cd and As uptake by rice, respectively, so they may be used as emergency measures to cope with single Cd or As contamination in paddy soils.
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Affiliation(s)
- Daixia Yin
- College of Resources and Environmental Science, Hunan Normal University, Changsha, Hunan 410081, China; State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, Jiangsu 210023, China
| | - Xin Wang
- College of Resources and Environmental Science, Hunan Normal University, Changsha, Hunan 410081, China.
| | - Bo Peng
- College of Resources and Environmental Science, Hunan Normal University, Changsha, Hunan 410081, China
| | - Changyin Tan
- College of Resources and Environmental Science, Hunan Normal University, Changsha, Hunan 410081, China
| | - Lena Q Ma
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, Jiangsu 210023, China; Soil and Water Science Department, University of Florida, Gainesville, FL 32611, USA
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978
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Huang B, Xin J, Dai H, Zhou W. Effects of Interaction between Cadmium (Cd) and Selenium (Se) on Grain Yield and Cd and Se Accumulation in a Hybrid Rice (Oryza sativa) System. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2017; 65:9537-9546. [PMID: 29016122 DOI: 10.1021/acs.jafc.7b03316] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
A pot experiment was conducted to investigate the interactive effects of cadmium (Cd) and selenium (Se) on their accumulation in three rice cultivars, which remains unclear. The results showed that Se reduced Cd-induced growth inhibition, and increased and decreased Se and Cd concentrations in brown rice, respectively. Cadmium concentrations in all tissues of the hybrid were similar to those in its male parent yet significantly lower than those in its female parent. Selenium reduced Cd accumulation in rice when Cd concentration exceeded 2.0 mg kg-1; however Se accumulation depended on the levels of Cd exposure. Finally, Cd had minimal effect on Se translocation within the three cultivars. We concluded that Cd concentration in brown rice is a heritable trait, making crossbreeding a feasible method for cultivating high-yield, low-Cd rice cultivars. Selenium effectively decreased the toxicity and accumulation of Cd, and Cd affected Se uptake but not translocation.
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Affiliation(s)
- Baifei Huang
- Research Center for Environmental Pollution Control Technology, School of Safety and Environmental Engineering, Hunan Institute of Technology , Hengyang 421002, China
| | - Junliang Xin
- Research Center for Environmental Pollution Control Technology, School of Safety and Environmental Engineering, Hunan Institute of Technology , Hengyang 421002, China
| | - Hongwen Dai
- Research Center for Environmental Pollution Control Technology, School of Safety and Environmental Engineering, Hunan Institute of Technology , Hengyang 421002, China
| | - Wenjing Zhou
- Research Center for Environmental Pollution Control Technology, School of Safety and Environmental Engineering, Hunan Institute of Technology , Hengyang 421002, China
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979
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Chen Z, Zheng Y, Ding C, Ren X, Yuan J, Sun F, Li Y. Integrated metagenomics and molecular ecological network analysis of bacterial community composition during the phytoremediation of cadmium-contaminated soils by bioenergy crops. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2017; 145:111-118. [PMID: 28711820 DOI: 10.1016/j.ecoenv.2017.07.019] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2017] [Revised: 07/06/2017] [Accepted: 07/10/2017] [Indexed: 06/07/2023]
Abstract
Two energy crops (maize and soybean) were used in the remediation of cadmium-contaminated soils. These crops were used because they are fast growing, have a large biomass and are good sources for bioenergy production. The total accumulation of cadmium in maize and soybean plants was 393.01 and 263.24μg pot-1, respectively. The rhizosphere bacterial community composition was studied by MiSeq sequencing. Phylogenetic analysis was performed using 16S rRNA gene sequences. The rhizosphere bacteria were divided into 33 major phylogenetic groups according to phyla. The dominant phylogenetic groups included Proteobacteria, Acidobacteria, Actinobacteria, Gemmatimonadetes, and Bacteroidetes. Based on principal component analysis (PCA) and unweighted pair group with arithmetic mean (UPGMA) analysis, we found that the bacterial community was influenced by cadmium addition and bioenergy cropping. Three molecular ecological networks were constructed for the unplanted, soybean- and maize-planted bacterial communities grown in 50mgkg-1 cadmium-contaminated soils. The results indicated that bioenergy cropping increased the complexity of the bacterial community network as evidenced by a higher total number of nodes, the average geodesic distance (GD), the modularity and a shorter geodesic distance. Proteobacteria and Acidobacteria were the keystone bacteria connecting different co-expressed operational taxonomic units (OTUs). The results showed that bioenergy cropping altered the topological roles of individual OTUs and keystone populations. This is the first study to reveal the effects of bioenergy cropping on microbial interactions in the phytoremediation of cadmium-contaminated soils by network reconstruction. This method can greatly enhance our understanding of the mechanisms of plant-microbe-metal interactions in metal-polluted ecosystems.
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Affiliation(s)
- Zhaojin Chen
- Key Laboratory of Ecological Security for Water Source Region of Mid-line Project of South-to-North Diversion Project of Henan Province, College of Agricultural Engineering, Nanyang Normal University, Nanyang 473061, People's Republic of China; Henan Collaborative Innovation Center of Water Security for Water Source Region of Mid-line Project of South-to-North Diversion Project, Nanyang 473061, People's Republic of China.
| | - Yuan Zheng
- Key Laboratory of Ecological Security for Water Source Region of Mid-line Project of South-to-North Diversion Project of Henan Province, College of Agricultural Engineering, Nanyang Normal University, Nanyang 473061, People's Republic of China; Henan Collaborative Innovation Center of Water Security for Water Source Region of Mid-line Project of South-to-North Diversion Project, Nanyang 473061, People's Republic of China
| | - Chuanyu Ding
- Key Laboratory of Ecological Security for Water Source Region of Mid-line Project of South-to-North Diversion Project of Henan Province, College of Agricultural Engineering, Nanyang Normal University, Nanyang 473061, People's Republic of China; Henan Collaborative Innovation Center of Water Security for Water Source Region of Mid-line Project of South-to-North Diversion Project, Nanyang 473061, People's Republic of China
| | - Xuemin Ren
- Key Laboratory of Ecological Security for Water Source Region of Mid-line Project of South-to-North Diversion Project of Henan Province, College of Agricultural Engineering, Nanyang Normal University, Nanyang 473061, People's Republic of China; Henan Collaborative Innovation Center of Water Security for Water Source Region of Mid-line Project of South-to-North Diversion Project, Nanyang 473061, People's Republic of China
| | - Jian Yuan
- Key Laboratory of Ecological Security for Water Source Region of Mid-line Project of South-to-North Diversion Project of Henan Province, College of Agricultural Engineering, Nanyang Normal University, Nanyang 473061, People's Republic of China; Henan Collaborative Innovation Center of Water Security for Water Source Region of Mid-line Project of South-to-North Diversion Project, Nanyang 473061, People's Republic of China
| | - Feng Sun
- Key Laboratory of Ecological Security for Water Source Region of Mid-line Project of South-to-North Diversion Project of Henan Province, College of Agricultural Engineering, Nanyang Normal University, Nanyang 473061, People's Republic of China; Henan Collaborative Innovation Center of Water Security for Water Source Region of Mid-line Project of South-to-North Diversion Project, Nanyang 473061, People's Republic of China
| | - Yuying Li
- Key Laboratory of Ecological Security for Water Source Region of Mid-line Project of South-to-North Diversion Project of Henan Province, College of Agricultural Engineering, Nanyang Normal University, Nanyang 473061, People's Republic of China; Henan Collaborative Innovation Center of Water Security for Water Source Region of Mid-line Project of South-to-North Diversion Project, Nanyang 473061, People's Republic of China
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980
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Knockout of OsNramp5 using the CRISPR/Cas9 system produces low Cd-accumulating indica rice without compromising yield. Sci Rep 2017; 7:14438. [PMID: 29089547 PMCID: PMC5663754 DOI: 10.1038/s41598-017-14832-9] [Citation(s) in RCA: 209] [Impact Index Per Article: 29.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2017] [Accepted: 10/17/2017] [Indexed: 12/03/2022] Open
Abstract
Rice grain with excessive cadmium (Cd) is a major source of dietary Cd intake and a serious threat to health for people who consume rice as a staple food. The development of elite rice cultivars with consistently low Cd content is challenging for conventional breeding approaches, and new strategies urgently need to be developed. Here, we report the development of new indica rice lines with low Cd accumulation and no transgenes by knocking out the metal transporter gene OsNramp5 using CRISPR/Cas9 system. Hydroponic culture showed that Cd concentrations in shoots and roots of osnramp5 mutants were dramatically decreased, resulting in rescue of impaired growth in high Cd condition. Cd-contaminated paddy field trials demonstrated that Cd concentration in osnramp5 grains was consistently less than 0.05 mg/kg, in contrast to high Cd concentrations from 0.33 mg/kg to 2.90 mg/kg in grains of Huazhan (the wild-type indica rice). In particular, the plant yield was not significantly affected in osnramp5 mutants. Furthermore, we developed promising hybrid rice lines with extremely low Cd content in grains. Our work supplies a practical approach to developing Cd pollution-safe indica rice cultivars that minimizes Cd contamination risk in grains.
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981
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Li SW, Liu X, Sun HJ, Li MY, Zhao D, Luo J, Li HB, Ma LQ. Effect of phosphate amendment on relative bioavailability and bioaccessibility of lead and arsenic in contaminated soils. JOURNAL OF HAZARDOUS MATERIALS 2017; 339:256-263. [PMID: 28654790 DOI: 10.1016/j.jhazmat.2017.06.040] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2017] [Revised: 05/02/2017] [Accepted: 06/19/2017] [Indexed: 06/07/2023]
Abstract
Hand-to-mouth activity is an important pathway for children's exposure to contaminated soils, which is often co-contaminated by Pb and As in mining and smelting sites. To reduce soil Pb risk to humans by oral exposure, phosphate amendments have been used to reduce Pb relative bioavailability (RBA), but its efficiency has not been investigated using validated in vitro assays nor its influence on As-RBA. Here, 5 contaminated soils (A-E) were amended with 0.5% phosphoric acid (PA) to study its effect on Pb- and As- RBA using a newly-developed mouse kidney model and bioaccessibility using 4 in vitro assays including UBM, SBRC, IVG, and PBET. Based on the mouse kidney model, Pb-RBA in PA-amended soils decreased from 14.2-62.5% to 10.1-29.8%. In contrast, As-RBA decreased from 26.5% to 15.9% in soil B but increased from 27.5 to 41.2% in soil D, with changes being insignificant in 3 other soils (35.8-58.8 to 28.1-61.1%). When assessing Pb bioaccessibility in PA-amended soils, decreased bioaccessibility were found using PBET and SBRC. For As, its bioaccessibility increased in PA-amended soils, inconsistent with in vivo data. Our results shed light on the importance of method selection to assess risk in Pb- and As-contaminated soils amended with phosphate.
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Affiliation(s)
- Shi-Wei Li
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, Jiangsu, 210023, People's Republic of China
| | - Xue Liu
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, Jiangsu, 210023, People's Republic of China
| | - Hong-Jie Sun
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, Jiangsu, 210023, People's Republic of China
| | - Meng-Ya Li
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, Jiangsu, 210023, People's Republic of China
| | - Di Zhao
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, Jiangsu, 210023, People's Republic of China
| | - Jun Luo
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, Jiangsu, 210023, People's Republic of China
| | - Hong-Bo Li
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, Jiangsu, 210023, People's Republic of China.
| | - Lena Q Ma
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, Jiangsu, 210023, People's Republic of China; Soil and Water Science Department, University of Florida, Gainesville, FL 32611, United States.
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982
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Liang X, Qin X, Huang Q, Huang R, Yin X, Cai Y, Wang L, Sun Y, Xu Y. Remediation mechanisms of mercapto-grafted palygorskite for cadmium pollutant in paddy soil. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:23783-23793. [PMID: 28866741 DOI: 10.1007/s11356-017-0014-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2017] [Accepted: 08/22/2017] [Indexed: 06/07/2023]
Abstract
The immobilization agent was the key factor that determined the success of remediation of heavy metal polluted soil. In this study, mercapto-grafted palygorskite (MP) as a novel and efficient immobilization agent was utilized for the remediation of Cd-polluted paddy soil in pot trials, and the remediation mechanisms were investigated in the aspect of soil chemistry and plant physiology with different rice cultivars as model plants. Mercapto-grafted palygorskite at applied doses of 0.1-0.3% could reduce Cd contents of brown rice and straws of different cultivars significantly. Both reduced DTPA-extractable Cd contents in rhizosphere and non-rhizosphere soil and decreasing Cd contents in iron plaques on rice root surfaces confirmed that MP was an efficient immobilization agent for Cd pollutant in paddy soil. In the aspect of soil chemistry, the pH values of rhizosphere and non-rhizosphere soils had no statistical changes in the MP treatment groups, but their zeta potentials decreased obviously, indicating that MP could enhance the fixation or sorption of Cd on soil compositions. In the aspect of antioxidant system, MP could increase POD activity of rice roots significantly to alleviate the stress of Cd to roots, and resulted in the decrease of T-AOC, SOD, and CAT activities of rice roots of the selected cultivars. MP had no inhabitation or enhancement effects on TSH of rice roots but enhance the contents of MTs and NPT to binding Cd to complete detoxification process. MP as a novel and efficient immobilization agent could complete the remediation effects through soil chemistry and plant physiological mechanisms.
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Affiliation(s)
- Xuefeng Liang
- Innovation Team of Remediation for Heavy Metal Contaminated Farmlands, Agro-Environmental Protection Institute, Ministry of Agriculture, No. 31, Fukang Road, Nankai District, Tianjin, 300191, People's Republic of China
- Key Laboratory of Original Environmental Pollution Control of MOA/Tianjin Key Laboratory of Agro-Environment and Agro-Product Safety, Tianjin, 300191, People's Republic of China
| | - Xu Qin
- Innovation Team of Remediation for Heavy Metal Contaminated Farmlands, Agro-Environmental Protection Institute, Ministry of Agriculture, No. 31, Fukang Road, Nankai District, Tianjin, 300191, People's Republic of China
- Key Laboratory of Original Environmental Pollution Control of MOA/Tianjin Key Laboratory of Agro-Environment and Agro-Product Safety, Tianjin, 300191, People's Republic of China
| | - Qingqing Huang
- Innovation Team of Remediation for Heavy Metal Contaminated Farmlands, Agro-Environmental Protection Institute, Ministry of Agriculture, No. 31, Fukang Road, Nankai District, Tianjin, 300191, People's Republic of China
- Key Laboratory of Original Environmental Pollution Control of MOA/Tianjin Key Laboratory of Agro-Environment and Agro-Product Safety, Tianjin, 300191, People's Republic of China
| | - Rong Huang
- Innovation Team of Remediation for Heavy Metal Contaminated Farmlands, Agro-Environmental Protection Institute, Ministry of Agriculture, No. 31, Fukang Road, Nankai District, Tianjin, 300191, People's Republic of China
- Key Laboratory of Original Environmental Pollution Control of MOA/Tianjin Key Laboratory of Agro-Environment and Agro-Product Safety, Tianjin, 300191, People's Republic of China
| | - Xiuling Yin
- College of Environment and Resources, Jilin University, Changchun, 130021, People's Republic of China
| | - Yanming Cai
- Innovation Team of Remediation for Heavy Metal Contaminated Farmlands, Agro-Environmental Protection Institute, Ministry of Agriculture, No. 31, Fukang Road, Nankai District, Tianjin, 300191, People's Republic of China
- Key Laboratory of Original Environmental Pollution Control of MOA/Tianjin Key Laboratory of Agro-Environment and Agro-Product Safety, Tianjin, 300191, People's Republic of China
| | - Lin Wang
- Innovation Team of Remediation for Heavy Metal Contaminated Farmlands, Agro-Environmental Protection Institute, Ministry of Agriculture, No. 31, Fukang Road, Nankai District, Tianjin, 300191, People's Republic of China
- Key Laboratory of Original Environmental Pollution Control of MOA/Tianjin Key Laboratory of Agro-Environment and Agro-Product Safety, Tianjin, 300191, People's Republic of China
| | - Yuebing Sun
- Innovation Team of Remediation for Heavy Metal Contaminated Farmlands, Agro-Environmental Protection Institute, Ministry of Agriculture, No. 31, Fukang Road, Nankai District, Tianjin, 300191, People's Republic of China
- Key Laboratory of Original Environmental Pollution Control of MOA/Tianjin Key Laboratory of Agro-Environment and Agro-Product Safety, Tianjin, 300191, People's Republic of China
| | - Yingming Xu
- Innovation Team of Remediation for Heavy Metal Contaminated Farmlands, Agro-Environmental Protection Institute, Ministry of Agriculture, No. 31, Fukang Road, Nankai District, Tianjin, 300191, People's Republic of China.
- Key Laboratory of Original Environmental Pollution Control of MOA/Tianjin Key Laboratory of Agro-Environment and Agro-Product Safety, Tianjin, 300191, People's Republic of China.
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983
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Zheng R, Li C, Sun G, Xie Z, Chen J, Wu J, Wang Q. The influence of particle size and feedstock of biochar on the accumulation of Cd, Zn, Pb, and As by Brassica chinensis L. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:22340-22352. [PMID: 28801768 DOI: 10.1007/s11356-017-9854-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2016] [Accepted: 07/31/2017] [Indexed: 05/27/2023]
Abstract
Biochar produced from rice straw (RC) and maize stalk (MC) was amended to the heavy metal-contaminated soil to investigate the effects of different biochar feedstock and particle size (fine, moderate, coarse) on the accumulation of Cd, Zn, Pb, and As in Brassica chinensis L. (Chinese cabbage). The concentrations of Cd, Zn, and Pb in shoot were decreased by up to 57, 75, and 63%, respectively, after biochar addition (4%). Only MC decreased As concentration in B. chinensis L. shoots by up to 61%. Biochar treatments significantly decreased NH4NO3-extractable concentrations of Cd, Zn, and Pb in soil by 47-62, 33-66, and 38-71%, respectively, yet increased that of As by up to 147%. Amendment of RC was more effective on immobilizing Cd, Zn, and Pb, but mobilizing soil As, than MC. A decrease in biochar particle size greatly contributed to the immobilization of Cd, Zn, and Pb in soil and thereby the reduction of their accumulations in B. chinensis L. shoots, especially RC. Increases in soil pH and extractable P induced by biochar addition contributed to the sequestration of Cd, Zn, and Pb and the mobilization of As. Shoot biomass, root biomass, and root system of B. chinensis L. were enhanced with biochar amendments, especially RC. This study indicates that biochar addition could potentially decrease Cd, Zn, Pb, and As accumulations in B. chinensis L., and simultaneously increase its yield. A decrease in biochar particle size is favorable to improve the immobilization of heavy metals (except As). The reduction in Cd, Zn, Pb, and As levels in B. chinensis L. shoots by biochar amendment could be mainly attributed to a function of heavy metal mobility in soil, plant translocation factor, and root uptake.
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Affiliation(s)
- Ruilun Zheng
- Research & Development Center for Grasses and Environment, Beijing Academy of Agriculture and Forestry Sciences, Beijing, 100097, People's Republic of China
| | - Cui Li
- Research & Development Center for Grasses and Environment, Beijing Academy of Agriculture and Forestry Sciences, Beijing, 100097, People's Republic of China
| | - Guoxin Sun
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, People's Republic of China
| | - Zubin Xie
- State Key Laboratory of Soil and Sustainable Agriculture, Jiangsu Biochar Engineering Center, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, People's Republic of China
| | - Jie Chen
- Research & Development Center for Grasses and Environment, Beijing Academy of Agriculture and Forestry Sciences, Beijing, 100097, People's Republic of China
| | - Juying Wu
- Research & Development Center for Grasses and Environment, Beijing Academy of Agriculture and Forestry Sciences, Beijing, 100097, People's Republic of China
| | - Qinghai Wang
- Research & Development Center for Grasses and Environment, Beijing Academy of Agriculture and Forestry Sciences, Beijing, 100097, People's Republic of China.
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984
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Huang B, Li Z, Li D, Yuan Z, Chen Z, Huang J. Distribution characteristics of heavy metal(loid)s in aggregates of different size fractions along contaminated paddy soil profile. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:23939-23952. [PMID: 28875383 DOI: 10.1007/s11356-017-0012-4] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2017] [Accepted: 08/22/2017] [Indexed: 06/07/2023]
Abstract
Soil aggregates exert a significant influence on the retention and availability of heavy metal(loid)s in soil. In this study, the concentration distribution and chemical forms of heavy metals (Cu, Zn, Cd, Pb, and Hg) and a metalloid (As) in different aggregate-sized fractions (2-0.25, 0.25-0.05, 0.05-0.002, and < 0.002 mm) along the profile (0-1, 1-5, 5-15, and 15-25 cm) of a contaminated paddy field were investigated. The results showed that the values of pH, free Fe oxides (Fed), bulk density, and catalase activity gradually increased, whereas the soil organic matter (SOM), cation exchange capacity (CEC), electrical conductivity (EC), microbial biomass carbon (MBC), and urease activity decreased with depth. Long-term heavy metal pollution might impact the catalase activity but showed no obvious influence on the urease activity. Additionally, there was a notable difference in physicochemical properties among the soil aggregates of various particle sizes. The 2-0.25-mm fraction aggregates contained more organic matter, whereas the highest values of CEC and Fed were observed in the < 0.002-mm fraction. The concentrations of all six heavy metals/metalloid decreased with depth. In different layers, Cu and Cd showed the highest concentrations in the 2-0.25 mm-fraction, followed by the < 0.002-mm fraction, whereas the highest concentrations of Zn, Pb, and As appeared in the < 0.002-mm fraction. No obvious distribution regularity was observed for Hg among the aggregates. All of the metal(loid)s had lower activity in the deeper soil layers, except for Hg. Furthermore, Cu and Cd displayed more stable forms in the < 0.002-mm fraction aggregates.
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Affiliation(s)
- Bin Huang
- Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Guangdong Institute of Eco-environmental Science & Technology, Guangzhou, 510650, China
| | - Zhongwu Li
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, China.
- Key Laboratory of Environment Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, China.
| | - Dingqiang Li
- Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Guangdong Institute of Eco-environmental Science & Technology, Guangzhou, 510650, China.
| | - Zaijian Yuan
- Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Guangdong Institute of Eco-environmental Science & Technology, Guangzhou, 510650, China
| | - Zhiliang Chen
- Ministry of Environment Protection, South China Institute of Environmental Science, Guangzhou, 510655, China
| | - Jinquan Huang
- Department of Soil and Water Conservation, Yangtze River Scientific Research Institute, Wuhan, 430010, China
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985
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Wei Y, Zheng X, Shohag MJI, Gu M. Bioaccessibility and Human Exposure Assessment of Cadmium and Arsenic in Pakchoi Genotypes Grown in Co-Contaminated Soils. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2017; 14:ijerph14090977. [PMID: 28850097 PMCID: PMC5615514 DOI: 10.3390/ijerph14090977] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/02/2017] [Revised: 08/22/2017] [Accepted: 08/22/2017] [Indexed: 02/08/2023]
Abstract
In many countries cadmium (Cd) and arsenic (As) commonly coexist in soils contaminated by mining activities, and can easily enter the human body via consumption of leafy vegetables, like the popularly consumed pakchoi (Brassica chinensis L.), causing major health concerns. In the present study, bioaccessibility and human exposure of Cd and As were assessed in twenty genotypes of pakchoi cultured at two different levels of co-contamination to identify low health risk genotypes. The bioaccessibilities of Cd and As represent a fraction of the total metals content could be bioaccessible for human, in the present study, significant differences in pakchoi Cd and As bioaccessibility were observed among all tested genotypes and co-contaminated levels. Cd and As bioaccessibility of pakchoi were in the ranges of 24.0-87.6% and 20.1-82.5%, respectively, for in the high level co-contaminated soils, which was significantly higher than for low level co-contaminated soils with 7.9-71.8% for Cd bioaccessibility and 16.1-59.0% for As bioaccessibility. The values of bioaccessible established daily intakes (BEDI) and the total bioaccessible target hazard quotients (TBTHQ) of Cd and As were also considerably higher in high level co-contaminated soils than in low level co-contaminated soils. Two genotypes (Meiguanqinggengcai and Zhenqing60F1) contained relatively low concentrations and bioaccessible Cd and As and, their BEDI and TBTHQ for Cd and As ranged below the tolerable limits set by the FAO/WHO (BEDI of Cd < 0.83 μg kg-1 bw day-1, BEDI of As < 3 μg kg-1 bw day-1) and United States Environmental Protection Agency (TBTHQ for Cd and As < 1), this applied for both levels of co-contaminated soils for adults and children. Consequently, these findings suggest identification of safe genotypes in leafy vegetable with low health risk via genotypic screening and breeding methods could be a useful strategy to ensure the safety of food crops grown in those Cd and As co-contaminated fields due to mining activities.
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Affiliation(s)
- Yanyan Wei
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Cultivation Base of Guangxi Key Laboratory for Agro-Environment and Agro-Products Safety, College of Agriculture, Guangxi University, Nanning 530004, China.
| | - Xiaoman Zheng
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Cultivation Base of Guangxi Key Laboratory for Agro-Environment and Agro-Products Safety, College of Agriculture, Guangxi University, Nanning 530004, China.
| | - Md Jahidul Islam Shohag
- Ministry of Education Key Laboratory of Environmental Remediation and Ecosystem Health, College of Environmental and Resources Science, Zhejiang University, Hangzhou 310058, China.
- Department of Agriculture, Bangabandhu Sheikh Mujibur Rahman Science and Technology University, Gopalganj 8100, Bangladesh.
| | - Minghua Gu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Cultivation Base of Guangxi Key Laboratory for Agro-Environment and Agro-Products Safety, College of Agriculture, Guangxi University, Nanning 530004, China.
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986
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Ma L, Wang L, Jia Y, Yang Z. Accumulation, translocation and conversion of six arsenic species in rice plants grown near a mine impacted city. CHEMOSPHERE 2017; 183:44-52. [PMID: 28531558 DOI: 10.1016/j.chemosphere.2017.05.089] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2017] [Revised: 05/04/2017] [Accepted: 05/15/2017] [Indexed: 06/07/2023]
Abstract
Paddy rice (Oryza sativa L.) as the staple food in China was found to be efficient in accumulating arsenic (As) due to cultivated in flooded paddy soil. Uptake and translocation of As in rice plant depended on the As species. In this work, rice plant samples including roots, straws and grains as well as rhizosphere soils were collected from paddy fields near Changsha, a mine impacted city in Southern China. The total As concentrations in the collected samples were observed in the descending order as root > soil > straw > grain. The predominant As species detected in rice plants were inorganic forms: arsenite [As(III)] and arsenate [As(V)]. Except monomethylarsonate (MMA) and dimethylarsinate (DMA), other two organoarsenicals, arsenobetaine (AsB) and arsenocholine (AsC), were also detected in rice plants. DMA and AsB were mainly formed in rice roots with the assistance of microorganisms. MMA and AsC detected in straws might be derived from methylation and oxidation of As(III). The results of multiple linear regressions indicated that the straw As species were remarkable predictors of the corresponding grain As species. Demethylation or degradation of MMA, DMA and AsC were predicted when translocated from straw to grain.
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Affiliation(s)
- Li Ma
- 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; Hunan Provincial Key Laboratory of Efficient and Clean Utilization of Manganese Resources, Central South University, Changsha, 410083, China.
| | - Yuyu Jia
- 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; Hunan Provincial Key Laboratory of Efficient and Clean Utilization of Manganese Resources, Central South University, Changsha, 410083, China; Center for Environment and Water Resources, Central South University, Changsha, 410083, China.
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987
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Modeling acute toxicity of metal mixtures to wheat (Triticum aestivum L.) using the biotic ligand model-based toxic units method. Sci Rep 2017; 7:9443. [PMID: 28842695 PMCID: PMC5573337 DOI: 10.1038/s41598-017-09940-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2017] [Accepted: 08/01/2017] [Indexed: 11/26/2022] Open
Abstract
The combined toxic effects of copper (Cu) and cobalt (Co) were predicted using the biotic ligand model (BLM) for different concentrations of magnesium (Mg2+) and pH levels, with parameters derived from Cu-only and Co-only toxicity data. The BLM-based toxic unit (TU) approach was used for prediction. Higher activities of Mg2+ linearly increased the EC50 of Cu and Co, supporting the concept of competitive binding of Mg2+ and metal ions in toxic action. The effects of pH on Cu and Co toxicity were related not only to free Cu2+ and Co2+ activity, respectively, but also to inorganic metal complexes. Stability constants for the binding of Cu2+, CuHCO3+, CuCO3(aq), CuOH+, Mg2+, Co2+, CoHCO3+ and Mg2+ with biotic ligands were logKCuBL 5.87, \documentclass[12pt]{minimal}
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\begin{document}$$\mathrm{log}\,{K}_{{{\rm{CuHCO}}}_{3}{\rm{BL}}}$$\end{document}logKCuHCO3BL 5.67, \documentclass[12pt]{minimal}
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\begin{document}$$\mathrm{log}\,{K}_{{{\rm{CuCO}}}_{3}{\rm{BL}}}$$\end{document}logKCuCO3BL 5.44, logKCuOHBL 5.07, logKMgBL 2.93, logKCoBL 4.72, \documentclass[12pt]{minimal}
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\begin{document}$$\mathrm{log}\,{K}_{{{\rm{CoHCO}}}_{3}{\rm{BL}}}$$\end{document}logKCoHCO3BL 5.81 and logKMgBL 3.84, respectively. The combinations of Cu and Co showed additive effects under different conditions. When compared with the FIAM-based TU model (root mean square error [RMSE = 16.31, R2 = 0.84]), the BLM-based TU model fitted the observed effects better (RMSE = 6.70, R2 = 0.97). The present study supports the BLM principles, which indicate that metal speciation and major cations competition need to be accounted for when predicting toxicity of both single metals and mixtures of metals.
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988
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Xu J, Shi S, Wang L, Tang Z, Lv T, Zhu X, Ding X, Wang Y, Zhao FJ, Wu Z. OsHAC4 is critical for arsenate tolerance and regulates arsenic accumulation in rice. THE NEW PHYTOLOGIST 2017; 215:1090-1101. [PMID: 28407265 DOI: 10.1111/nph.14572] [Citation(s) in RCA: 88] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2017] [Accepted: 03/12/2017] [Indexed: 05/04/2023]
Abstract
Soil contamination with arsenic (As) can cause phytotoxicity and elevated As accumulation in rice grain. Here, we used a forward genetics approach to investigate the mechanism of arsenate (As(V)) tolerance and accumulation in rice. A rice mutant hypersensitive to As(V), but not to As(III), was isolated. Genomic resequencing and complementation tests were used to identify the causal gene. The function of the gene, its expression pattern and subcellular localization were characterized. OsHAC4 is the causal gene for the As(V)-hypersensitive phenotype. The gene encodes a rhodanase-like protein that shows As(V) reductase activity when expressed in Escherichia coli. OsHAC4 was highly expressed in roots and was induced by As(V). In OsHAC4pro-GUS transgenic plants, the gene was expressed exclusively in the root epidermis and exodermis. OsHAC4-eGFP was localized in the cytoplasm and the nucleus. Mutation in OsHAC4 resulted in decreased As(V) reduction in roots, decreased As(III) efflux to the external medium and markedly increased As accumulation in rice shoots. Overexpression of OsHAC4 increased As(V) tolerance and decreased As accumulation in rice plants. OsHAC4 is an As(V) reductase that is critical for As(V) detoxification and for the control of As accumulation in rice. As(V) reduction, followed by As(III) efflux, is an important mechanism of As(V) detoxification.
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Affiliation(s)
- Jiming Xu
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Shulin Shi
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Lei Wang
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Zhong Tang
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Tingting Lv
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Xinlu Zhu
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Xiaomeng Ding
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Yifeng Wang
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Fang-Jie Zhao
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, China
- Rothamsted Research, Harpenden, Hertfordshire, AL5 2JQ, UK
| | - Zhongchang Wu
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, Hangzhou, 310058, China
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989
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Qi F, Dong Z, Lamb D, Naidu R, Bolan NS, Ok YS, Liu C, Khan N, Johir MAH, Semple KT. Effects of acidic and neutral biochars on properties and cadmium retention of soils. CHEMOSPHERE 2017; 180:564-573. [PMID: 28437653 DOI: 10.1016/j.chemosphere.2017.04.014] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2017] [Revised: 03/31/2017] [Accepted: 04/03/2017] [Indexed: 06/07/2023]
Abstract
In this study, an acidic biochar and a neutral biochar were applied at 5 wt% into two soils for an 11-month incubation experiment. One Ferrosol soil (Ba) was slightly acidic with low organic matter and the other Dermosol soil (Mt) was slightly alkaline with high organic matter. The acidic (pH = 3.25) wood shaving (WS) biochar had no marked impact on nutrient levels, cation exchange capacity (CEC), pH and acid neutralization capacity (ANC) of either soil. By contrast, the neutral (pH = 7.00) chicken litter (CL) biochar significantly increased major soluble nutrients, pH, ANC of soil Ba. In terms of C storage, 87.9% and 69.5% WS biochar-C can be sequestrated as TOC by soil Ba and Mt, respectively, whereas only 24.0% of CL biochar-C stored in soil Ba and negligible amount in Mt as TOC. Biochars did not have significant effects on soil sorption capacity and sorption reversibility except that CL biochar increased sorption of soil Ba by around 25.4% and decreased desorption by around 50.0%. Overall, the studied acidic C rich WS biochar held little agricultural or remedial values but was favourable for C sequestration. The neutral mineral rich CL biochar may provide short-term agricultural benefit and certain sorption capacities of lower sorption capacity soils, but may be unlikely to result in heightened C sequestration in soils. This is the first study comprehensively examining functions of acidic and neutral biochars for their benefits as a soil amendment and suggests the importance of pre-testing biochars for target purposes prior to their large scale production.
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Affiliation(s)
- Fangjie Qi
- Global Centre for Environmental Remediation, ATC Building, Faculty of Science, The University of Newcastle, University Drive, Callaghan, NSW 2308, Australia; Cooperative Research Centre for Contamination Assessment and Remediation of Environment (CRC CARE), The University of Newcastle, Callaghan, NSW 2308, Australia
| | - Zhaomin Dong
- Global Centre for Environmental Remediation, ATC Building, Faculty of Science, The University of Newcastle, University Drive, Callaghan, NSW 2308, Australia; Cooperative Research Centre for Contamination Assessment and Remediation of Environment (CRC CARE), The University of Newcastle, Callaghan, NSW 2308, Australia
| | - Dane Lamb
- Global Centre for Environmental Remediation, ATC Building, Faculty of Science, The University of Newcastle, University Drive, Callaghan, NSW 2308, Australia; Cooperative Research Centre for Contamination Assessment and Remediation of Environment (CRC CARE), The University of Newcastle, Callaghan, NSW 2308, Australia
| | - Ravi Naidu
- Global Centre for Environmental Remediation, ATC Building, Faculty of Science, The University of Newcastle, University Drive, Callaghan, NSW 2308, Australia; Cooperative Research Centre for Contamination Assessment and Remediation of Environment (CRC CARE), The University of Newcastle, Callaghan, NSW 2308, Australia
| | - Nanthi S Bolan
- Global Centre for Environmental Remediation, ATC Building, Faculty of Science, The University of Newcastle, University Drive, Callaghan, NSW 2308, Australia; Cooperative Research Centre for Contamination Assessment and Remediation of Environment (CRC CARE), The University of Newcastle, Callaghan, NSW 2308, Australia.
| | - Yong Sik Ok
- Korea Biochar Research Center & School of Natural Resources and Environmental Science, Kangwon National University, Chuncheon, 24341, South Korea
| | - Cuixia Liu
- School of Energy and Environmental Engineering, Zhongyuan University of Technology, Zhengzhou, 450007, China
| | - Naser Khan
- Natural & Built Environments, School of Natural & Built Environments, University of South Australia, Mawson Lakes, SA 5095, Australia
| | - M A H Johir
- Center for Technology in Water and Wastewater, Faculty of Engineering and IT, University of Technology, Sydney, 81 Broadway, NSW 2007 Australia
| | - Kirk T Semple
- Lancaster Environment Centre, Lancaster University, LA1 4YQ, United Kingdom
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990
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Li Q, Wang C, Dai T, Shi W, Zhang X, Xiao Y, Song W, Li B, Wang Y. Prediction of soil cadmium distribution across a typical area of Chengdu Plain, China. Sci Rep 2017; 7:7115. [PMID: 28755002 PMCID: PMC5533786 DOI: 10.1038/s41598-017-07690-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2017] [Accepted: 07/03/2017] [Indexed: 11/09/2022] Open
Abstract
A suitable method and appropriate environmental variables are important for accurately predicting heavy metal distribution in soils. However, the classical methods (e.g., ordinary kriging (OK)) have a smoothing effect that results in a tendency to neglect local variability, and the commonly used environmental variables (e.g., terrain factors) are ineffective for improving predictions across plains. Here, variables were derived from the obvious factors affecting soil cadmium (Cd), such as road traffic, and were used as auxiliary variables for a combined method (HASM_RBFNN) that was developed using high accuracy surface modelling (HASM) and radial basis function neural network (RBFNN) model. This combined method was then used to predict soil Cd distribution in a typical area of Chengdu Plain in China, considering the spatial non-stationarity of the relationships between soil Cd and the derived variables based on 339 surface soil samples. The results showed that HASM_RBFNN had lower prediction errors than OK, regression kriging (RK) and HASM_RBFNNs, which didn't consider the spatial non-stationarity of the soil Cd-derived variables relationships. Furthermore, HASM_RBFNN provided improved detail on local variations. The better performance suggested that the derived environmental variables were effective and HASM_RBFNN was appropriate for improving the prediction of soil Cd distribution across plains.
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Affiliation(s)
- Qiquan Li
- College of Resources, Sichuan Agricultural University, Chengdu, 611130, China
| | - Changquan Wang
- College of Resources, Sichuan Agricultural University, Chengdu, 611130, China.
| | - Tianfei Dai
- College of Resources, Sichuan Agricultural University, Chengdu, 611130, China
- Chengdu Testing Center of Soil and Fertilizer, Chengdu, 610041, China
| | - Wenjiao Shi
- Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, China
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Xin Zhang
- College of Resources, Sichuan Agricultural University, Chengdu, 611130, China
| | - Yi Xiao
- College of Resources, Sichuan Agricultural University, Chengdu, 611130, China
| | - Weiping Song
- Department of Transportation of Sichuan Province, Chengdu, 610041, China
| | - Bing Li
- College of Resources, Sichuan Agricultural University, Chengdu, 611130, China
| | - Yongdong Wang
- College of Resources, Sichuan Agricultural University, Chengdu, 611130, China
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991
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Huang Y, He C, Shen C, Guo J, Mubeen S, Yuan J, Yang Z. Toxicity of cadmium and its health risks from leafy vegetable consumption. Food Funct 2017; 8:1373-1401. [PMID: 28232985 DOI: 10.1039/c6fo01580h] [Citation(s) in RCA: 113] [Impact Index Per Article: 16.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Cadmium (Cd) is a highly toxic heavy metal and has spread widely in the environment in recent decades. This review summarizes current knowledge about Cd contamination of leafy vegetables, its toxicity, exposure, health risks, and approaches to reducing its toxicity in humans. Leafy vegetable consumption has been identified as a dominant exposure pathway of Cd in the human body. An overview of Cd pollution in leafy vegetables as well as the main sources of Cd is given. Notable estimated daily intakes and health risks of Cd exposure through vegetable consumption for humans are revealed in occupational exposure areas and even in some reference areas. Vegetable consumption is one of the most significant sources of exposure to Cd, particularly in occupational exposure regions. Therefore, numerous approaches have been developed to minimize the accumulation of Cd in leafy vegetables, among which the breeding of Cd pollution-safe cultivars is one of the most effective tools. Furthermore, dietary supplements from leafy vegetables perform positive roles in alleviating Cd toxicity in humans with regard to the effects of essential mineral elements, vitamins and phytochemicals taken into the human body via leafy vegetable consumption.
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Affiliation(s)
- Yingying Huang
- State Key Laboratory for Biocontrol, School of Life Sciences, Sun Yat-Sen University, Xingang Xi Road 135, Guangzhou, 510275, China.
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992
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Xiao R, Wang S, Li R, Wang JJ, Zhang Z. Soil heavy metal contamination and health risks associated with artisanal gold mining in Tongguan, Shaanxi, China. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2017; 141:17-24. [PMID: 28285205 DOI: 10.1016/j.ecoenv.2017.03.002] [Citation(s) in RCA: 160] [Impact Index Per Article: 22.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2016] [Revised: 03/03/2017] [Accepted: 03/06/2017] [Indexed: 05/27/2023]
Abstract
Soil contamination with heavy metals due to mining activities poses risks to ecological safety and human well-being. Limited studies have investigated heavy metal pollution due to artisanal mining. The present study focused on soil contamination and the health risk in villages in China with historical artisanal mining activities. Heavy metal levels in soils, tailings, cereal and vegetable crops were analyzed and health risk assessed. Additionally, a botany investigation was conducted to identify potential plants for further phytoremediation. The results showed that soils were highly contaminated by residual tailings and previous mining activities. Hg and Cd were the main pollutants in soils. The Hg and Pb concentrations in grains and some vegetables exceeded tolerance limits. Moreover, heavy metal contents in wheat grains were higher than those in maize grains, and leafy vegetables had high concentrations of metals. Ingestion of local grain-based food was the main sources of Hg, Cd, and Pb intake. Local residents had high chronic risks due to the intake of Hg and Pb, while their carcinogenic risk associated with Cd through inhalation was low. Three plants (Erigeron canadensis L., Digitaria ciliaris (Retz.) Koel., and Solanum nigrum L.) were identified as suitable species for phytoremediation.
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Affiliation(s)
- Ran Xiao
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi Province 712100, China; School of Plant, Environmental and Soil Sciences, Louisiana State University AgCenter, Baton Rouge, LA 70803, USA.
| | - Shuang Wang
- College of Biochemistry and Environmental Engineering, Hanjiang Normal University, Shiyan 442000, China.
| | - Ronghua Li
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi Province 712100, China
| | - Jim J Wang
- School of Plant, Environmental and Soil Sciences, Louisiana State University AgCenter, Baton Rouge, LA 70803, USA
| | - Zengqiang Zhang
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi Province 712100, China.
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993
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Liu H, Zhao H, Wu L, Liu A, Zhao FJ, Xu W. Heavy metal ATPase 3 (HMA3) confers cadmium hypertolerance on the cadmium/zinc hyperaccumulator Sedum plumbizincicola. THE NEW PHYTOLOGIST 2017; 215:687-698. [PMID: 28574163 DOI: 10.1111/nph.14622] [Citation(s) in RCA: 120] [Impact Index Per Article: 17.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2017] [Accepted: 04/21/2017] [Indexed: 05/18/2023]
Abstract
Cadmium (Cd) is highly toxic to most organisms, but some rare plant species can hyperaccumulate Cd in aboveground tissues without suffering from toxicity. The mechanism underlying Cd detoxification by hyperaccumulators is interesting but unclear. Here, the heavy metal ATPase 3 (SpHMA3) gene responsible for Cd detoxification was isolated from the Cd/zinc (Zn) hyperaccumulator Sedum plumbizincicola. RNA interference (RNAi)-mediated silencing and overexpression of SpHMA3 were induced to investigate its physiological functions in S. plumbizincicola and a nonhyperaccumulating ecotype of Sedum alfredii. Heterologous expression of SpHMA3 in Saccharomyces cerevisiae showed Cd-specific transport activity. SpHMA3 was highly expressed in the shoots and the protein was localized to the tonoplast. The SpHMA3-RNAi lines were hypersensitive to Cd but not to Zn, with the growth of shoots and young leaves being severely inhibited by Cd. Overexpressing SpHMA3 in the nonhyperaccumulating ecotype of S. alfredii greatly increased its tolerance to and accumulation of Cd, but not Zn. These results indicate that elevated expression of the tonoplast-localized SpHMA3 in the shoots plays an essential role in Cd detoxification, which contributes to the maintenance of the normal growth of young leaves of S. plumbizincicola in Cd-contaminated soils.
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Affiliation(s)
- Huan Liu
- Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, 210095, China
| | - Haixia Zhao
- Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Longhua Wu
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China
| | - Anna Liu
- Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China
| | - Fang-Jie Zhao
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, 210095, China
| | - Wenzhong Xu
- Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China
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994
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Effects of Biochar-Derived Sewage Sludge on Heavy Metal Adsorption and Immobilization in Soils. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2017. [PMID: 28644399 PMCID: PMC5551119 DOI: 10.3390/ijerph14070681] [Citation(s) in RCA: 60] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The object of this study was to evaluate the effect of sewage sludge biochar on adsorption and mobility of Cr, Mn, Cu, and Zn. Biochar (BC400) was produced via pyrolysis of municipal sewage sludge at 400 °C. Maximum adsorption capacities (qm) for Zn, Cr, Mn, and Cu were 5.905, 5.724, 5.681, and 5.342 mg·g-1, respectively, in the mono-metal solution and 2.475, 8.204, 1.01, and 5.415 mg·g-1, respectively, in the multi-metal solution. The adsorption capacities for Mn, Cu, and Zn decreased in the multi-metal solution due to competitive adsorption, whereas the capacity for Cr increased. Surface precipitation is an important mechanism in the sorption of these metals on BC400. The 360-day incubation experiment showed that BC400 application reduced metal mobility in contaminated soils, which was attributed to the substantial decreases in the acid-soluble fractions of Cr, Mn, Cu, and Zn (72.20%, 70.38%, 50.43%, and 29.78%, respectively). Furthermore, the leaching experiment using simulated acid rain indicated that the addition of BC400 enhanced the acid buffer capacity of contaminated soil, and the concentration of Cr, Mn, Cu, and Zn in the leachate was lower than in untreated soil. Overall, this study indicates that sewage sludge biochar application reduces the mobility of heavy metal in co-contaminated soil, and this adsorption experiment is suitable for the evaluation of biochar properties for remediation.
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995
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Zhao D, Liu RY, Xiang P, Juhasz AL, Huang L, Luo J, Li HB, Ma LQ. Applying Cadmium Relative Bioavailability to Assess Dietary Intake from Rice to Predict Cadmium Urinary Excretion in Nonsmokers. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2017; 51:6756-6764. [PMID: 28490173 DOI: 10.1021/acs.est.7b00940] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Dietary Cd intake is often estimated without considering Cd bioavailability. Measured urinary Cd for a cohort of 119 nonsmokers with rice as a staple was compared to predicted values from rice-Cd intake with and without considering Cd relative bioavailability (RBA) in rice based on a steady state mouse kidney bioassay and toxicokinetic model. The geometric mean (GM) of urinary Cd and β2-microglobulin was 1.08 and 234 μg g-1 creatinine. Applying Cd-RBA in foods to aggregate Cd intake (41.5 ± 12.4, 48.0 ± 9.3, 48.8 ± 21.3% for rice, wheat, and vegetables), rice was the largest contributor (71%). For 63 participants providing paired urine and rice samples, the predicted GM of urinary Cd at 4.14 μg g-1 based on total Cd in rice was 3.5 times that of measured value at 1.20 μg g-1, while incorporating Cd-RBA to assess rice-Cd intake made the two closer with GM at 1.07 μg g-1. The cohort findings were extended to a national scale, with urinary Cd for nonsmokers from rice Cd intake was mapped at province/city levels after considering rice Cd-RBA. Therefore, incorporating Cd bioavailability to assess dietary Cd intake is a valuable tool to accurately estimate human Cd exposure and associated health risk.
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Affiliation(s)
- Di Zhao
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University , Nanjing 210023, People's Republic of China
| | - Rong-Yan Liu
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University , Nanjing 210023, People's Republic of China
| | - Ping Xiang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University , Nanjing 210023, People's Republic of China
| | - Albert L Juhasz
- Future Industries Institute, University of South Australia , Mawson Lakes, South Australia 5095, Australia
| | - Lei Huang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University , Nanjing 210023, People's Republic of China
| | - Jun Luo
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University , Nanjing 210023, People's Republic of China
| | - Hong-Bo Li
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University , Nanjing 210023, People's Republic of China
| | - Lena Q Ma
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University , Nanjing 210023, People's Republic of China
- Soil and Water Science Department, University of Florida , Gainesville, Florida 32611, United States
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996
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Dai H, Yang Z. Variation in Cd accumulation among radish cultivars and identification of low-Cd cultivars. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:15116-15124. [PMID: 28497327 DOI: 10.1007/s11356-017-9061-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Accepted: 04/18/2017] [Indexed: 06/07/2023]
Abstract
Heavy metals have serious health consequences and ecosystem impacts. A pot experiment was conducted to investigate the variation of cadmium (Cd) uptake and accumulation among 40 cultivars of radish (Raphanus sativus L.) at three Cd levels, including 0.31 (T1), 0.83 (T2), and 1.13 (T3) mg kg-1. Most of the tested cultivars had higher taproot biomass in the T3 treatment when compared to those in the T1 treatment, indicating a Cd stress-induced growth in radish. Taproot Cd concentrations in 95 and 5% of the tested cultivars were lower than 0.1 mg kg-1 (fresh weight, FW) in the T1 and T2 treatments, respectively; however, there was no cultivar suitable for safe consumption in the T3 treatment. Radish production showed potential risk of Cd pollution as high as some leafy vegetables when grown in the soils where Cd concentration exceeded 0.8 mg kg-1. When compared with Chinese heat-resisting or imported cultivars, Chinese common cultivars had significantly higher taproot Cd concentrations. Three low-Cd cultivars and five high-Cd cultivars were identified. Taproot Cd concentrations showed significant correlations between any two of the three treatments (p < 0.01), suggesting that Cd accumulation in taproot of radish was genotype-dependent.
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Affiliation(s)
- Hongwen Dai
- Research Center for Environmental Pollution Control Technology, School of Safety and Environmental Engineering, Hunan Institute of Technology, Hengyang, 421002, China
- State Key Laboratory for Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou, 510275, China
| | - Zhongyi Yang
- State Key Laboratory for Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou, 510275, China.
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997
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Yang X, Li Q, Tang Z, Zhang W, Yu G, Shen Q, Zhao FJ. Heavy metal concentrations and arsenic speciation in animal manure composts in China. WASTE MANAGEMENT (NEW YORK, N.Y.) 2017; 64:333-339. [PMID: 28320622 DOI: 10.1016/j.wasman.2017.03.015] [Citation(s) in RCA: 104] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2016] [Revised: 02/07/2017] [Accepted: 03/08/2017] [Indexed: 06/06/2023]
Abstract
A nationwide survey of animal manure-based composts was carried out in China. Two hundred and twelve samples were collected and analyzed for the concentrations of 9 heavy metals or metalloids and arsenic (As) speciation. The concentrations of heavy metals vary widely (Zn 11.8-3692, Cu 3.6-916, Cr 0.7-6603, Ni 0.7-73, Pb 0.05-189, As 0.4-72, Co 0.1-94, Cd 0.01-8.7 and Hg 0.01-1.9mgkg-1 dry weight). Compared with the maximum permissible values of the Chinese standard for organic fertilizers, 13.7% and 2.4% of the composts exceeded the limits for As (15mgkg-1) and Cd (3mgkg-1), respectively. Some samples contained very high concentrations of Zn and Cu, although no limits have been set for these two metals in China. Further analysis showed that As was present mainly as arsenate (AsⅤ), with dimethylarsenate (DMA) and monomethylarsenate (MMA) as the minor species in composts. There were significant correlations between the concentrations of Zn, Cu and As, suggesting co-contamination of these elements in some composts. Monte Carlo simulations based on the distributions of metal concentrations and application rate showed that repeated applications of compost likely increase the concentrations of Zn, Cu, Cd and Hg in soil significantly compared with the soil background levels. This study highlights a need to minimize the concentrations of Zn, Cu, Cd, Hg and As in animal manures to ensure their safe recycling to agricultural soils.
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Affiliation(s)
- Xinping Yang
- Jiangsu Key Laboratory for Organic Waste Utilization, Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China.
| | - Qian Li
- Jiangsu Key Laboratory for Organic Waste Utilization, Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Zhu Tang
- Jiangsu Key Laboratory for Organic Waste Utilization, Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Wenwen Zhang
- Jiangsu Key Laboratory for Organic Waste Utilization, Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Guanghui Yu
- Jiangsu Key Laboratory for Organic Waste Utilization, Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Qirong Shen
- Jiangsu Key Laboratory for Organic Waste Utilization, Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Fang-Jie Zhao
- Jiangsu Key Laboratory for Organic Waste Utilization, Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China; Rothamsted Research, Harpenden, Hertfordshire AL5 2JQ, UK
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998
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Chen Z, Tang YT, Zhou C, Xie ST, Xiao S, Baker AJM, Qiu RL. Mechanisms of Fe biofortification and mitigation of Cd accumulation in rice (Oryza sativa L.) grown hydroponically with Fe chelate fertilization. CHEMOSPHERE 2017; 175:275-285. [PMID: 28232138 DOI: 10.1016/j.chemosphere.2017.02.053] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2016] [Revised: 01/25/2017] [Accepted: 02/08/2017] [Indexed: 06/06/2023]
Abstract
Cadmium contaminated rice from China has become a global food safety issue. Some research has suggested that chelate addition to substrates can affect metal speciation and plant metal content. We investigated the mitigation of Cd accumulation in hydroponically-grown rice supplied with EDTANa2Fe(II) or EDDHAFe(III). A japonica rice variety (Nipponbare) was grown in modified Kimura B solution containing three concentrations (0, 10, 100 μΜ) of the iron chelates EDTANa2Fe(II) or EDDHAFe(III) and 1 μΜ Cd. Metal speciation in solution was simulated by Geochem-EZ; growth and photosynthetic efficiency of rice were evaluated, and accumulation of Cd and Fe in plant parts was determined. Net Cd fluxes in the meristematic zone, growth zone, and maturation zone of roots were monitored by a non-invasive micro-test technology. Expression of Fe- and Cd-related genes in Fe-sufficient or Fe-deficient roots and leaves were studied by QRT-PCR. Compared to Fe deficiency, a sufficient or excess supply of Fe chelates significantly enhanced rice growth by elevating photosynthetic efficiency. Both Fe chelates increased the Fe content and decreased the Cd content of rice organs, except for the Cd content of roots treated with excess EDDHAFe(III). Compared to EDDHAFe(III), EDTANa2Fe(II) exhibited better mitigation of Cd accumulation in rice by generating the EDTANa2Cd complex in solution, decreasing net Cd influx and increasing net Cd efflux in root micro-zones. Application of EDTANa2Fe(II) and EDDHAFe(III) also reduced Cd accumulation in rice by inhibiting expression of genes involved in transport of Fe and Cd in the xylem and phloem. The 'win-win' situation of Fe biofortification and Cd mitigation in rice was achieved by application of Fe chelates. Root-to-stem xylem transport of Cd and redistribution of Cd in leaves by phloem transport can be regulated in rice through the use of Fe chelates that influence Fe availability and Fe-related gene expression. Fe fertilization decreased Cd influx and increased Cd efflux in rice roots.
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Affiliation(s)
- Zhe Chen
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, PR China
| | - Ye-Tao Tang
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, PR China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology (Sun Yat-sen University), Guangzhou 510275, PR China.
| | - Can Zhou
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, PR China
| | - Shu-Ting Xie
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, PR China
| | - Shi Xiao
- School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, PR China
| | - Alan J M Baker
- School of BioSciences, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - Rong-Liang Qiu
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, PR China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology (Sun Yat-sen University), Guangzhou 510275, PR China.
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999
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Shen F, Liao R, Ali A, Mahar A, Guo D, Li R, Xining S, Awasthi MK, Wang Q, Zhang Z. Spatial distribution and risk assessment of heavy metals in soil near a Pb/Zn smelter in Feng County, China. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2017; 139:254-262. [PMID: 28160703 DOI: 10.1016/j.ecoenv.2017.01.044] [Citation(s) in RCA: 130] [Impact Index Per Article: 18.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2016] [Revised: 01/21/2017] [Accepted: 01/24/2017] [Indexed: 06/06/2023]
Abstract
A large scale survey and a small scale continuous monitoring was conducted to evaluate the impact of Pb/Zn smelting on soil heavy metals (HMs) accumulation and potential ecological risk in Feng County, Shaanxi province of China. Soil parameters including pH, texture, CEC, spatial and temporal distribution of HMs (Cd, Cu, Ni, Pb and Zn), and BCR fractionation were monitored accordingly. The results showed the topsoil in the proximity of smelter, especially the smelter area and county seat, were highly polluted by HMs in contrast to the river basins. Fractionation of Cd and Zn in soil samples revealed higher proportion of mobile fractions than other HMs. The soil Cd and Zn contents decreased vertically, but still exceeded the second level limits of Environmental Quality Standard for Soils of China (EQSS) within 80cm. The dominated soil pollutant (Cd) had higher ecological risk than Cu, Ni, Zn and Pb. The potential ecological risk (PER) factor of Cd were 65.7% and 100% in surrounding county and smelter area, respectively. The long-term smelter dust emission mainly contributed to the HMs pollution and posed serious environment risk to living beings.
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Affiliation(s)
- Feng Shen
- College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, PR China
| | - Renmei Liao
- 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
| | - Amanullah Mahar
- 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
| | - Ronghua Li
- College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, PR China
| | - Sun Xining
- College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, PR China
| | - Mukesh Kumar Awasthi
- College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, PR China; Department of Biotechnology, Amicable Knowledge Solution University, Satna, India
| | - Quan Wang
- 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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1000
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Ma L, Wang L, Tang J, Yang Z. Arsenic speciation and heavy metal distribution in polished rice grown in Guangdong Province, Southern China. Food Chem 2017; 233:110-116. [PMID: 28530555 DOI: 10.1016/j.foodchem.2017.04.097] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2016] [Revised: 03/17/2017] [Accepted: 04/17/2017] [Indexed: 01/24/2023]
Abstract
Arsenic speciation and heavy metal distributions have been investigated in locally grown rice grains from Guangdong Province, Southern China. A total of 41 polished rice grain samples were collected throughout Guangdong Province. Arsenite (As(III)), as the predominant form found in the rice, was positively correlated (p<0.01) with total As (tAs) concentration. However, the percentage of As(III) reduced while tAs concentration increased (r=-0.361, p<0.05), due to restricted accumulation and translocation of As(III) in rice grains at high level of tAs. Statistical and geostatistical analyses were applied to investigate potential origins of heavy metals in rice. Only Cd, Cu and Ni were identified as influenced by anthropogenic sources such as industrial and commercial activities. As and Pb were primarily controlled by natural occurrence. The results of health risk assessment implied that continuous intake of rice grown in Guangdong Province could cause considerably non-carcinogenic and carcinogenic risk to local inhabitants.
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Affiliation(s)
- Li Ma
- College of Chemistry & Chemical Engineering, Central South University, Changsha 410083, China
| | - Lin Wang
- College of Chemistry & Chemical Engineering, Central South University, Changsha 410083, China.
| | - Jie Tang
- Institute of Clinical Pharmacology, Xiangya Hospital, Central South University, Changsha 410078, China
| | - Zhaoguang Yang
- College of Chemistry & Chemical Engineering, Central South University, Changsha 410083, China; Center for Environment and Water Resources, Central South University, Changsha 410083, China.
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