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Jiang Z, Guo Z, Peng C, Anaman R, Gao Z, Xiao X. Effects of Simulated Reclaimed Water on Soil Particle Sizes and Cd Adsorption and Migration in Soils at Smelting Sites. BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2023; 111:36. [PMID: 37702759 DOI: 10.1007/s00128-023-03800-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Accepted: 08/30/2023] [Indexed: 09/14/2023]
Abstract
This work studied the vertical migration characteristics of Cd in soil profiles from a zinc smelting site under the influence of simulated reclaimed water containing NaCl and Na2SO4. The isothermal adsorption curves of Cd in the soils of miscellaneous fill and weathered slate well fitted the Freundlich and Langmuir models, with R2 ranging from 0.991 to 0.998. The maximum adsorption capacity of Cd in the soils decreased significantly under the salt ion treatments with NaCl and Na2SO4. After leaching, the Cd concentrations in the leachates and Cd contents in the subsoil layers of 10-60 cm followed the order NaCl treatment > Na2SO4 treatment > CK (p < 0.05), suggesting that the salt ions promoted the vertical migration of exogenous Cd. The proportion of coarse particles (> 0.02 mm) decreased, while that of fine particles (< 0.02 mm) increased under salt ion treatments (p < 0.05). The morphological characterization indicated that salt ions accelerated the erosion and fragmentation of coarse particles to form fine particles. The use of reclaimed water to flush smelting sites may increase the risk of Cd migration with small-sized soil particles from the soil to groundwater.
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Affiliation(s)
- Zhichao Jiang
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China
| | - Zhaohui Guo
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China
| | - Chi Peng
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China.
| | - Richmond Anaman
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China
| | - Zilun Gao
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China
| | - Xiyuan Xiao
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China
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Li B, Liu Y, Tao Z, Zhao Z, Fan T, Li Z. Sorption and mobility of cadmium in soil impacted by irrigation waters. Heliyon 2023; 9:e16304. [PMID: 37251851 PMCID: PMC10213374 DOI: 10.1016/j.heliyon.2023.e16304] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Revised: 04/21/2023] [Accepted: 05/12/2023] [Indexed: 05/31/2023] Open
Abstract
Soil contamination by Cd has drawn global attention, while how irrigation waters modulate Cd sorption and mobility in soil remains obscure. We address this by investigating how cropped sandy soil irrigated with different waters altered Cd sorption and mobility using a rhizobox experiment followed by a batch experiment. Maize were planted in the rhizoboxes and irrigated by reclaimed water (RW), livestock wastewater (LW) and deionized water (CK), respectively. The bulk soil sampled from each treatment after 60 days of growth was employed to measure the Cd sorption and mobility using the isothermal adsorption and desorption experiments. The results showed that, in a small rhizobox experiment, the adsorption rate of Cd by the bulk soil in the adsorption phase was much faster than the desorption rate in desorption phase. Irrigation with RW and LW both reduced the Cd adsorption capacity of soil, and the reducing degree brought by LW was more obvious. Cd desorption rate was very low but keep increasing in the desorption stage, and pre-RW irrigation had the potential to increase Cd desorption from soil. Although the results were obtained based on the bulk soil sampled from a rhizobox experiment, our study strongly suggests that the altered Cd adsorption and desorption behavior in the soil caused by the RW and LW irrigation may risk the farmland ecosystem and deserve more concern.
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Affiliation(s)
- Baogui Li
- Institute of Farmland Irrigation, Chinese Academy of Agricultural Sciences, Xinxiang 453002, China
- College of Land Science and Technology, China Agricultural University, Haidian District, Beijing 100193, China
| | - Yuan Liu
- Institute of Farmland Irrigation, Chinese Academy of Agricultural Sciences, Xinxiang 453002, China
| | - Zhen Tao
- Institute of Farmland Irrigation, Chinese Academy of Agricultural Sciences, Xinxiang 453002, China
| | - Zhijuan Zhao
- Institute of Farmland Irrigation, Chinese Academy of Agricultural Sciences, Xinxiang 453002, China
| | - Tao Fan
- Institute of Farmland Irrigation, Chinese Academy of Agricultural Sciences, Xinxiang 453002, China
| | - Zhongyang Li
- Institute of Farmland Irrigation, Chinese Academy of Agricultural Sciences, Xinxiang 453002, China
- National Research and Observation Station of Shangqiu Agro-ecology System, Shangqiu 476000, China
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Chi W, Yang Y, Liu T, Sun Y, Du Y, Qin H, Li X. Effects of water salinity on cadmium availability at soil-water interface: implication for salt water intrusion. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:68892-68903. [PMID: 35554810 DOI: 10.1007/s11356-022-20606-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2021] [Accepted: 04/29/2022] [Indexed: 06/15/2023]
Abstract
Low-lying paddy fields in estuaries can be affected by salt water intrusion; however, it remains unclear how salt water intrusion influences the availability of heavy metals in paddy soil. In this study, batch adsorption and incubation experiments of soil were conducted with different salt water sampled along the estuary to investigate the effects of salt water intrusion on cadmium (Cd) availability. The surface complexation model (SCM) was established to assess the effects of pH on Cd adsorption behavior, which presented typical pH-dependent characteristics. The results of SCM also showed that Cd-chloro complexes became the dominant species when the ionic strength increased. The results of Cd fractions in the incubation experiments revealed a significant increase in dissolved Cd with increasing ionic strength. This may be attributed to the increased point of zero charge (pHpzc) in the presence of salt water with higher salinity, which likely formed more positive charges on soil surfaces, causing an inhibition of Cd adsorption via electrostatic repulsion. Moreover, higher concentrations of Cl- in salt water favored the formation of Cd-chloro complexes, facilitating Cd release from soil particles. This study provides mechanistic insights into the impact of salt water intrusion on Cd availability at the soil-water interface of paddy soil along the estuary.
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Affiliation(s)
- Wenting Chi
- SCNU Environmental Research Institute, Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety & MOE Key Laboratory of Theoretical Chemistry of Environment, South China Normal University, Guangzhou, 510006, China
- School of Environment, South China Normal University, Guangzhou, 510006, China
| | - Yang Yang
- National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-Environmental Pollution Control and Management, Guangdong Institute of Eco-Environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou, 510650, China
| | - Tongxu Liu
- National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-Environmental Pollution Control and Management, Guangdong Institute of Eco-Environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou, 510650, China
| | - Yan Sun
- National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-Environmental Pollution Control and Management, Guangdong Institute of Eco-Environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou, 510650, China
| | - Yanhong Du
- National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-Environmental Pollution Control and Management, Guangdong Institute of Eco-Environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou, 510650, China
| | - Haoli Qin
- School of Chemistry and Materials Science, Guizhou Normal University, Guiyang, 550001, People's Republic of China
| | - Xiaomin Li
- SCNU Environmental Research Institute, Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety & MOE Key Laboratory of Theoretical Chemistry of Environment, South China Normal University, Guangzhou, 510006, China.
- School of Environment, South China Normal University, Guangzhou, 510006, China.
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Deng D, Wu Y, Sun Y, Ren B, Song L. Pollution Characteristics and Spatial Distribution of Heavy Metals in Coal-Bearing Sandstone Soil: A Case Study of Coal Mine Area in Southwest China. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph19116493. [PMID: 35682077 PMCID: PMC9180046 DOI: 10.3390/ijerph19116493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Revised: 05/16/2022] [Accepted: 05/23/2022] [Indexed: 02/01/2023]
Abstract
Soil pollution in coal mining areas is a serious environmental problem in China and elsewhere. In this study, surface and vertical profile soil samples were collected from a coal mine area in Dazhu, Southwestern China. Microscopic observation, concentrations, chemical speciation, statistical analysis, spatial distribution, and risk assessment were used to assess heavy metal pollution. The results show that the weathering of coal-bearing sandstone and mining activities substantially contributed to soil pollution. The concentrations of Fe, Ni, Cu, Zn, Mn, Cd, Hg, and Pb exceeded their background values. Cd caused the most intense pollution and was associated with heavily-extremely contaminated soils. The residual fraction was dominant for most metals, except Cd and Mn, for which the reducible fraction was dominant (Cd: 55.17%; Mn: 81.16%). Zn, Ni, Cd, and Cu presented similar distribution patterns, and Hg and As also shared similar distribution characteristics. Factor 1 represented anthropogenic and lithologic sources, which were affected by mining activities; Factor 2 represented anthropogenic sources, e.g., fertilizers and traffic pollution; and Factor 3 represented the contribution of metals from soil-forming parent material. More than half of the study area had high pollution risk and was not suitable for vegetable cultivation.
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Affiliation(s)
- Dongping Deng
- College of Environment and Civil Engineering, Chengdu University of Technology, Chengdu 610059, China; (D.D.); (B.R.); (L.S.)
- State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu 610059, China
| | - Yong Wu
- College of Environment and Civil Engineering, Chengdu University of Technology, Chengdu 610059, China; (D.D.); (B.R.); (L.S.)
- State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu 610059, China
- Correspondence:
| | - Yi Sun
- School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China;
| | - Bangzheng Ren
- College of Environment and Civil Engineering, Chengdu University of Technology, Chengdu 610059, China; (D.D.); (B.R.); (L.S.)
- State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu 610059, China
| | - Lei Song
- College of Environment and Civil Engineering, Chengdu University of Technology, Chengdu 610059, China; (D.D.); (B.R.); (L.S.)
- State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu 610059, China
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Wang F, Bao K, Huang C, Zhao X, Han W, Yin Z. Adsorption and pH Values Determine the Distribution of Cadmium in Terrestrial and Marine Soils in the Nansha Area, Pearl River Delta. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph19020793. [PMID: 35055615 PMCID: PMC8775905 DOI: 10.3390/ijerph19020793] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Revised: 12/21/2021] [Accepted: 12/22/2021] [Indexed: 11/23/2022]
Abstract
Cadmium is a toxic element with a half-life of several decades, which can accumulate in the human body by entering the food chain and seriously harm health. The cadmium adsorption and desorption processes in the soil directly affect the migration, transformation, bioavailability, and ecotoxicity of this element in soil-plant systems. Coastal zones are located in the transitional zone between land and sea, and large amounts of terrigenous material input have important environmental effects on this ecosystem. The pH, hydrodynamic conditions, soil organic matter (SOM), and other factors defining the sea-land interaction within the sedimentary environment are significantly different from those defining land facies. In order to study the key factors affecting cadmium adsorption in soils at the sea-land interface in the Nansha area of the Pearl River Delta, a test was conducted on a column of undisturbed soil. The results showed that the adsorption constant KF and the Cd2+ adsorption capacity of marine soils were higher than those of terrestrial soils. However, the saturation adsorption of cadmium in terrestrial sediments was higher than in marine sediments. Soil pH was an important factor affecting cadmium adsorption capacity in both terrestrial and ma-rine sediments. Neutral and alkaline topsoil conditions inhibited the vertical migration of cadmium, while the acidic environment favored it. The higher the clay and SOM were, the stronger the Cd2+ adsorption capacity of the soil was. These findings suggest that the distribution of cadmium in marine and continental sedimentary soils is not only related to adsorption, but also to the physical and chemical processes occurring in different sedimentary environments.
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Affiliation(s)
- Fangting Wang
- Wuhan Geological Survey Center, China Geological Survey, Wuhan 430205, China; (F.W.); (X.Z.)
| | - Ke Bao
- Safety Center for River and Lake Protection, Construction and Operation, Changjiang Water Resources Commission of the Ministry of Water Resources, Wuhan 430015, China;
| | - Changsheng Huang
- Wuhan Geological Survey Center, China Geological Survey, Wuhan 430205, China; (F.W.); (X.Z.)
- Correspondence:
| | - Xinwen Zhao
- Wuhan Geological Survey Center, China Geological Survey, Wuhan 430205, China; (F.W.); (X.Z.)
| | - Wenjing Han
- Geological Survey Research Institute, China University of Geosciences, Wuhan 430074, China; (W.H.); (Z.Y.)
| | - Zhibin Yin
- Geological Survey Research Institute, China University of Geosciences, Wuhan 430074, China; (W.H.); (Z.Y.)
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Zhang Y, Liao M, Guo J, Xu N, Xie X, Fan Q. The co-transport of Cd(Ⅱ) with nanoscale As 2S 3 in soil-packed column: Effects of ionic strength. CHEMOSPHERE 2022; 286:131628. [PMID: 34333186 DOI: 10.1016/j.chemosphere.2021.131628] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Revised: 06/25/2021] [Accepted: 07/20/2021] [Indexed: 06/13/2023]
Abstract
To observe the co-transport of Cd(Ⅱ) with nanoscale As2S3 (nAs2S3) in a soil-packed column under different ionic strength (IS). A soil-packed column experiment with Cd(Ⅱ) and nAs2S3 was conducted. The results show that the transport of Cd(Ⅱ) was facilitated remarkably in the presence of nAs2S3, and nano-associated-Cd(Ⅱ) was the major migration type. However, the co-transport of Cd(Ⅱ) and nAs2S3 was affected by IS. The Cd(Ⅱ) concentration in the effluent to initial Cd(Ⅱ) concentration decreased from 38.75% to 29.95% and 22.28% as IS increased from 1 mM to 10 mM and 50 mM. When IS was 1 mm, 10 mm and 50 mm, the retention of nAs2S3 increased from 74.29% to 78.95% and 85.9% respectively. The agglomeration and sedimentation of nAs2S3 were the main reason for the rise of retention. Due to the increase of retention and reduction in adsorption capacity of nAs2S3 to Cd(Ⅱ), the ratio of migration in the form of nano-associated-Cd(Ⅱ) reduced from 53% (IS 1 mM) to 27.4% (IS 10 mM) and 18.2% (IS 50 mM). During the transport, the IS promoted desorption of Cd(Ⅱ) from nAs2S3 so that more soluble Cd was monitored in the effluent as IS increased. In general, these findings can provide references for controlling the risk caused by the co-transport of nAs2S3 and Cd(Ⅱ) in saline-alkali soil.
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Affiliation(s)
- Yuhao Zhang
- College of Environmental and Resource Science, Zhejiang University, Yuhangtang Road No.866, Hangzhou, 310058, China; Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Yuhangtang Road No.866, Hangzhou, 310058, China
| | - Min Liao
- College of Environmental and Resource Science, Zhejiang University, Yuhangtang Road No.866, Hangzhou, 310058, China; Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Yuhangtang Road No.866, Hangzhou, 310058, China.
| | - Jiawen Guo
- College of Environmental and Resource Science, Zhejiang University, Yuhangtang Road No.866, Hangzhou, 310058, China; Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Yuhangtang Road No.866, Hangzhou, 310058, China
| | - Na Xu
- College of Environmental and Resource Science, Zhejiang University, Yuhangtang Road No.866, Hangzhou, 310058, China; Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Yuhangtang Road No.866, Hangzhou, 310058, China
| | - Xiaomei Xie
- College of Environmental and Resource Science, Zhejiang University, Yuhangtang Road No.866, Hangzhou, 310058, China; National Demonstration Center for Experimental Environmental and Resources Education (Zhejiang University), Yuhangtang Road No.866, Hangzhou, 310058, China.
| | - Qiyan Fan
- College of Environmental and Resource Science, Zhejiang University, Yuhangtang Road No.866, Hangzhou, 310058, China; National Demonstration Center for Experimental Environmental and Resources Education (Zhejiang University), Yuhangtang Road No.866, Hangzhou, 310058, China
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Kumar PS, Gayathri R, Rathi BS. A review on adsorptive separation of toxic metals from aquatic system using biochar produced from agro-waste. CHEMOSPHERE 2021; 285:131438. [PMID: 34252804 DOI: 10.1016/j.chemosphere.2021.131438] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2021] [Revised: 06/29/2021] [Accepted: 07/02/2021] [Indexed: 06/13/2023]
Abstract
Water is a basic and significant asset for living beings. Water assets are progressively diminishing due to huge populace development, industrial activities, urbanization and rural exercises. Few heavy metals include zinc, copper, lead, nickel, cadmium and so forth can easily transfer into the water system either direct or indirect activities of electroplating, mining, tannery, painting, fertilizer industries and so forth. The different treatment techniques have been utilized to eliminate the heavy metals from aquatic system, which includes coagulation/flocculation, precipitation, membrane filtration, oxidation, flotation, ion exchange, photo catalysis and adsorption. The adsorption technique is a better option than other techniques because it can eliminate heavy metals even at lower metal ions concentration, simplicity and better regeneration behavior. Agricultural wastes are low-cost biosorbent and typically containing cellulose have the ability to absorb a variety of contaminants. It is important to note that almost all agro wastes are no longer used in their original form but are instead processed in a variety of techniques to improve the adsorption capacity of the substance. The wide range of adsorption capacities for agro waste materials were observed and almost more than 99% removal of toxic pollutants from aquatic systems were achieved using modified agro-waste materials. The present review aims at the water pollution due to heavy metals, as well as various heavy metal removal treatment procedures. The primary objectives of this research is to include an overview of adsorption and various agriculture based adsorbents and its comparison in heavy metal removal.
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Affiliation(s)
- P Senthil Kumar
- Department of Chemical Engineering, Sri Sivasubramaniya Nadar College of Engineering, Chennai, 603110, India; Centre of Excellence in Water Research (CEWAR), Sri Sivasubramaniya Nadar College of Engineering, Chennai, 603110, India.
| | - R Gayathri
- Tamilnadu Pollution Control Board, Guindy, Chennai, 600032, India
| | - B Senthil Rathi
- Department of Chemical Engineering, St. Joseph's College of Engineering, Chennai, 600119, India
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