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Bao T, Wang P, Hu B, Jin Q, Zheng T, Li D. Adsorption and distribution of heavy metals in aquatic environments: The role of colloids and effects of environmental factors. JOURNAL OF HAZARDOUS MATERIALS 2024; 474:134725. [PMID: 38838528 DOI: 10.1016/j.jhazmat.2024.134725] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2024] [Revised: 05/16/2024] [Accepted: 05/23/2024] [Indexed: 06/07/2024]
Abstract
The study investigated the distributions of heavy metals (Cd, Cr, Cu, Mn, and Pb) between dissolved fraction (<0.7 µm) and particles (>0.7 µm) during the adsorption process. The dissolved fraction was further separated into truly dissolved (<3 kDa) and colloidal (3 kDa-0.7 µm) fractions. Significant metal adsorption occurred on the colloids, resulting in their aggregation into particles, which in turn influenced the particle adsorption kinetics. Colloids could either accelerate or inhibit the transformation of metal ions into particulates, depending on their stability. Competitive metals for colloids (Pb and Cr) were more susceptible to the effects of colloids than other elements. DOM was the predominant environmental factor influencing colloid behavior. The XDLVO theory showed that DOM enhanced the negative charge of colloids and made the colloid surface more hydrophilic, inhibiting the aggregation of colloids. DOM resulted in substantial increases in the concentrations of colloidal Pb and Cr from 0.31 μg/L and 4.58 μg/L to 20.52 μg/L and 43.51 μg/L, respectively, whereas the increment for less competitive metals (Cd and Mn) was smaller. These findings suggest that the distribution of heavy metals is influenced not only by adsorption from particles and ions but also by the complex dynamics of colloids.
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Affiliation(s)
- Tianli Bao
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, No.1, Xikang Road, Nanjing 210098, China
| | - Peifang Wang
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, No.1, Xikang Road, Nanjing 210098, China.
| | - Bin Hu
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, No.1, Xikang Road, Nanjing 210098, China.
| | - Qiutong Jin
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, No.1, Xikang Road, Nanjing 210098, China
| | - Tianming Zheng
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, No.1, Xikang Road, Nanjing 210098, China
| | - Dingxin Li
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, No.1, Xikang Road, Nanjing 210098, China
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Cui S, Yu W, Han X, Hu T, Yu M, Liang Y, Guo S, Ma J, Teng L, Liu Z. Factors influencing the distribution, risk, and transport of microplastics and heavy metals for wildlife and habitats in "island" landscapes: From source to sink. JOURNAL OF HAZARDOUS MATERIALS 2024; 476:134938. [PMID: 38901262 DOI: 10.1016/j.jhazmat.2024.134938] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2024] [Revised: 06/04/2024] [Accepted: 06/14/2024] [Indexed: 06/22/2024]
Abstract
Microplastics (MPs) and heavy metals (HMs) are important pollutants in terrestrial ecosystems. In particular, the "island" landscape's weak resistance makes it vulnerable to pollution. However, there is a lack of research on MPs and HMs in island landscapes. Therefore, we used Helan Mountain as the research area. Assess the concentrations, spatial distribution, ecological risks, sources, and transport of MPs and HMs in the soil and blue sheep (Pseudois nayaur) feces. Variations in geographical distribution showed a connection between human activity and pollutants. Risk assessment indicated soil and wildlife were influenced by long-term pollutant polarization and multi-element inclusion (Igeo, Class I; PHI, Class V; RI (MPs), 33 % Class II, and 17 % Class IV; HI = 452.08). Source apportionment showed that tourism and coal combustion were the primary sources of pollutants. Meanwhile, a new coupling model of PMF/Risk was applied to quantify the source contribution of various risk types indicated transportation roads and tourism sources were the main sources of ecological and health risks, respectively. Improve the traceability of pollution source risks. Furthermore, also developed a novel tracing model for pollutant transportation, revealing a unique "source-sink-source" cycle in pollutant transportation, which provides a new methodological framework for the division of pollution risk areas in nature reserves and the evaluation of spatial transport between sources and sinks. Overall, this study establishes a foundational framework for conducting comprehensive risk assessments and formulating strategies for pollution control and management.
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Affiliation(s)
- Shuang Cui
- College of Wildlife and Protected Area, Northeast Forestry University, Harbin 150040, China
| | - Wei Yu
- College of Wildlife and Protected Area, Northeast Forestry University, Harbin 150040, China; Key Laboratory of Animal Ecology and Conservation Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
| | - XingZhi Han
- College of Wildlife and Protected Area, Northeast Forestry University, Harbin 150040, China; Key Laboratory of Animal Ecology and Conservation Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
| | - Tianhua Hu
- Ningxia Helan Mountain National Nature Reserve Administration, Yinchuan 750021, China
| | - Mengqi Yu
- Forest Pest Control and Quarantine Station of Ningxia Hui Autonomous Region, Yinchuan 750021, China
| | - Yongliang Liang
- Ningxia Helan Mountain National Nature Reserve Administration, Yinchuan 750021, China
| | - Songtao Guo
- The College of Life Sciences, Northwest University, Shaanxi Key Laboratory for Animal Conservation, Xi'an 710069, China
| | - Jinlian Ma
- Inner Mongolia Helan Mountain National Natural Nature Reserve Administration, Alxa League, 750306, China
| | - Liwei Teng
- College of Wildlife and Protected Area, Northeast Forestry University, Harbin 150040, China; Key Laboratory of Conservation Biology, National Forestry and Grassland Administration, Harbin 150040, China.
| | - Zhensheng Liu
- College of Wildlife and Protected Area, Northeast Forestry University, Harbin 150040, China; Key Laboratory of Conservation Biology, National Forestry and Grassland Administration, Harbin 150040, China.
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Li W, Deng Y, Wang H, Hu Y, Cheng H. Potential risk, leaching behavior and mechanism of heavy metals from mine tailings under acid rain. CHEMOSPHERE 2024; 350:140995. [PMID: 38128738 DOI: 10.1016/j.chemosphere.2023.140995] [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: 11/01/2023] [Revised: 12/13/2023] [Accepted: 12/18/2023] [Indexed: 12/23/2023]
Abstract
The leaching of heavy metals from abandoned mine tailings can pose a severe threat to surrounding areas, especially in the regions influenced by acid rain with high frequency. In this study, the potential risks of heavy metals in the tailings collected from a small-scale abandoned multi-metal mine was assessed, and their leaching behavior and mechanism were investigated by batch, semi-dynamic and in situ leaching experiments under simulated and natural rainfall conditions. The results suggested that Zn, Cu, Pb, and Cd in the tailings could cause high/very high risks. Both batch and semi-dynamic leaching tests consistently confirmed that the leaching of heavy metals (particularly Cd) could lead to serious pollution of the surrounding environment. The leaching rates of heavy metals were pH-dependent and related to their chemical speciations in the mine tailings. The leaching behavior of Cu and Cd was dominated by surface wash-off, Zn was controlled by diffusion initially and then surface wash-off, and the leaching mechanisms of Pb and As varied with the pH conditions. It was estimated that acid rain could greatly elevate the release fluxes of Zn (20.8%), Cu (36.7%), Pb (49.9%) and Cd (35.3%) in the study area. These findings could improve the understanding of the leaching behavior of heavy metals from mine tailings and assist in developing appropriate management strategies.
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Affiliation(s)
- Wei Li
- MOE Laboratory of Groundwater Circulation and Evolution, School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing, 100083, China
| | - Yu Deng
- MOE Laboratory of Groundwater Circulation and Evolution, School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing, 100083, China
| | - Hao Wang
- MOE Laboratory of Groundwater Circulation and Evolution, School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing, 100083, China
| | - Yuanan Hu
- MOE Laboratory of Groundwater Circulation and Evolution, School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing, 100083, China.
| | - Hefa Cheng
- MOE Key Laboratory for Earth Surface Processes, College of Urban and Environmental Sciences, Peking University, Beijing, 100871, China
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Li C, Li S, Guo P, Li Y, Liu X. Recycling lead from copper plant residue (CPR) using brine leaching - Precipitation - Calcination process. CHEMOSPHERE 2023; 345:140489. [PMID: 37865206 DOI: 10.1016/j.chemosphere.2023.140489] [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: 06/26/2023] [Revised: 10/12/2023] [Accepted: 10/17/2023] [Indexed: 10/23/2023]
Abstract
Copper plant residue (CPR) is a hazardous industrial by-product possessing both high toxicity and valuable metal content, necessitating its high value-added utilization. Traditional practices in smelters involve stockpiling and landfilling of CPR, leading to substantial land occupation and water contamination. This study focused on the preparation of PbO and Pb3O4 using the HCl-NaCl leaching-conversion-thermal decomposition process, employing CPR as the primary raw material. The effect of various leaching process conditions on the metal leaching rate was explored. A maximum lead leaching rate of 87.65% was achieved under optimal conditions including leaching temperature, liquid-solid ratio, leaching time, HCl molar concentration, NaCl mass concentration, and particle size. The lead content in the leachate was 15.85 g/L. Experimental data indicated that ash diffusion control served as the rate-limiting step in the HCl-NaCl leaching process. The apparent activation energy was determined to be 18.374 kJ mol-1, with a reaction order of 0.8986 concerning the HCl concentration and an L/S ratio of 0.8124. Additionally, response surface methodology enabled the determination of technological parameters for refining PbCl2 into PbCO3 precursors, yielding a conversion rate exceeding 96.50%. Moreover, the technical indicators of PbO and Pb3O4 obtained through low-temperature thermal decomposition of PbCO3 were investigated. The fabricated PbO and Pb3O4 exhibited purities of 99.65% and 99.26%, respectively, effectively transforming CPR from hazardous waste residue into valuable products. The process ensures the efficient recovery of lead to its maximum extent and promotes residue recycling.
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Affiliation(s)
- Cong Li
- School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Suqin Li
- School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing, 100083, China.
| | - Penghui Guo
- School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Yongkui Li
- School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Xingyu Liu
- National Engineering Laboratory of Biohydrometallurgy, General Research Institute for Nonferrous Metals, Beijing, 100088, China
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Li C, Dong P, Yan J, Gong R, Meng Q, Yao J, Yu H, Ma Y, Liu B, Xie R. Analytical study on heavy metal output fluxes and source apportionment of a non-ferrous smelter in southwest China. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023:121867. [PMID: 37270050 DOI: 10.1016/j.envpol.2023.121867] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Revised: 04/28/2023] [Accepted: 05/21/2023] [Indexed: 06/05/2023]
Abstract
Abandoned Pb/Zn smelters are often accompanied by a large amount of smelting slag, which is a serious environmental problem. Previous studies have demonstrated that slag deposits pose an environmental threat even if the smelters are shut down. Herein, a Pb/Zn smelter and its impacted zone in GeJiu, Yunnan, China were selected as the study area. The risk and source apportionment of heavy metals (HMs) in the soil of the impacted zone were systematically studied. Based on the hydrogeological features, the migration path and output fluxes of the HMs released from smelting slag to the impacted zone were investigated. The HM contents (Cd, As, Zn, Pb, and Cu) in the soil substantially exceeded the screening values of the Chinese soil standard (GB15618-2018). Based on the results of the Pb isotopic and statistical analyses for source apportionment, the contaminated sites and agricultural irrigation water had a large impact on the HMs of soil. The hydrological analysis results showed that runoff, as an HM migration path under rainfall, continued to affect the environment. The water balance calculations using the Hydrologic Evaluation of Landfill Performance model showed that the rainfall was distributed on site as follows: evaporation (57.35%), runoff (32.63%), and infiltration (10.02%). Finally, the output fluxes were calculated in combination with the leaching experiment. As, Zn, Cd, Pb, and Cu runoff had the output fluxes of 6.1 × 10-3, 4.2 × 10-3, 4.1, 1.4 × 10-2, and 7.2 × 10-4 mg/kg/y, and infiltration of 1.9 × 10-3, 1.3 × 10-3, 1.3, 4.0 × 10-4, and 2.2 × 10-4 mg/kg/y, respectively. Therefore, this study offers theoretical and scientific recommendations for effective environmental management and engineering remediation.
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Affiliation(s)
- Chenchen Li
- Faculty of Metallurgy and Energy Engineering, National and Local Joint Engineering Laboratory for Lithium-ion Batteries and Materials Preparation Technology, Key Laboratory of Advanced Battery Materials Or Yunnan Province, Kunming University of Science and Technology, Kunming, 650093, China
| | - Peng Dong
- Faculty of Metallurgy and Energy Engineering, National and Local Joint Engineering Laboratory for Lithium-ion Batteries and Materials Preparation Technology, Key Laboratory of Advanced Battery Materials Or Yunnan Province, Kunming University of Science and Technology, Kunming, 650093, China
| | - Jin Yan
- Faculty of Metallurgy and Energy Engineering, National and Local Joint Engineering Laboratory for Lithium-ion Batteries and Materials Preparation Technology, Key Laboratory of Advanced Battery Materials Or Yunnan Province, Kunming University of Science and Technology, Kunming, 650093, China
| | - Rui Gong
- Faculty of Metallurgy and Energy Engineering, National and Local Joint Engineering Laboratory for Lithium-ion Batteries and Materials Preparation Technology, Key Laboratory of Advanced Battery Materials Or Yunnan Province, Kunming University of Science and Technology, Kunming, 650093, China
| | - Qi Meng
- Faculty of Metallurgy and Energy Engineering, National and Local Joint Engineering Laboratory for Lithium-ion Batteries and Materials Preparation Technology, Key Laboratory of Advanced Battery Materials Or Yunnan Province, Kunming University of Science and Technology, Kunming, 650093, China
| | - Jun Yao
- Faculty of Water Resources and Environment, China University of Geosciences (Beijing), Beijing, 100083, China
| | - Hanjing Yu
- Faculty of Metallurgy and Energy Engineering, National and Local Joint Engineering Laboratory for Lithium-ion Batteries and Materials Preparation Technology, Key Laboratory of Advanced Battery Materials Or Yunnan Province, Kunming University of Science and Technology, Kunming, 650093, China
| | - Yaoqiang Ma
- Faculty of Metallurgy and Energy Engineering, National and Local Joint Engineering Laboratory for Lithium-ion Batteries and Materials Preparation Technology, Key Laboratory of Advanced Battery Materials Or Yunnan Province, Kunming University of Science and Technology, Kunming, 650093, China
| | - Bang Liu
- Faculty of Water Resources and Environment, China University of Geosciences (Beijing), Beijing, 100083, China
| | - Ruosong Xie
- Faculty of Metallurgy and Energy Engineering, National and Local Joint Engineering Laboratory for Lithium-ion Batteries and Materials Preparation Technology, Key Laboratory of Advanced Battery Materials Or Yunnan Province, Kunming University of Science and Technology, Kunming, 650093, China.
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