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Kuyumcu Savan E, Kazıcı D, Özcan İ, Bayram S, Köytepe S. Preparation of pyridoxine-based polyurethane modified sensors and their use in simultaneous determination of Cu(II) - Co(II) ions. Talanta 2024; 278:126520. [PMID: 39013339 DOI: 10.1016/j.talanta.2024.126520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2024] [Revised: 06/16/2024] [Accepted: 07/05/2024] [Indexed: 07/18/2024]
Abstract
In this study, pyridoxine-based polyurethane-modified electrodes were prepared to simultaneously and sensitively measure copper (Cu(II)) and cobalt (Co(II)) ions in complex matrix samples. For the production of the electrodes, firstly, the synthesis of pyridoxine-based polyurethane structures was carried out. In these syntheses, the polymer structure was diversified by using different isocyanates. Polyethyleneglycol-200 (PEG), pyridoxine (B6), and β-cyclodextrin (β-CD) groups were used as the source of polyol. The synthesized polyurethane structures were characterized by different instrumental techniques and used in gold electrode surface modification. Modified sensor surfaces were examined by scanning electron microscopy and atomic force microscopy techniques. The prepared modified sensors were used for the simultaneous detection of Cu(II) and Co(II) ions using the differential pulse voltammetry technique. The limit of detection (LOD), limit of quantitation (LOQ), and R2 values for Cu(II) ions were calculated as 8.81 μM, 29.4 μM, and 0.993, respectively. LOD, LOQ, and R2 values for Co(II) ions were calculated as 9.84 μM, 32.8 μM, and 0.9935, respectively. For repeatability, the relative standard deviation (RSD %) of the prepared simultaneous sensors was determined as 1.54 and 1.71 for Cu(II) and Co(II), respectively. As a result, Cu(II) and Co(II) ions were measured independently and simultaneously with high sensitivity. According to these results, it is predicted that pyridoxine-based polyurethane-modified sensors may be suitable for the simultaneous detection of Cu(II) and Co(II) in medical, food, and agricultural samples.
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Affiliation(s)
- Ebru Kuyumcu Savan
- Division of Analytical Chemistry, Department of Basic Pharmaceutical Sciences, Faculty of Pharmacy, İnönü University, 44280, Malatya, Turkey.
| | - Dilek Kazıcı
- Division of Analytical Chemistry, Department of Basic Pharmaceutical Sciences, Faculty of Pharmacy, İnönü University, 44280, Malatya, Turkey
| | - İmren Özcan
- Chemistry Department, Faculty of Arts and Science, İnönü University, Malatya, 44280, Turkey
| | - Songül Bayram
- Chemistry Department, Faculty of Arts and Science, İnönü University, Malatya, 44280, Turkey
| | - Süleyman Köytepe
- Chemistry Department, Faculty of Arts and Science, İnönü University, Malatya, 44280, Turkey
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Chen Z, Zhao Y, Liang N, Yao Y, Zhao Y, Liu T. Pollution, cumulative ecological risk and source apportionment of heavy metals in water bodies and river sediments near the Luanchuan molybdenum mining area in the Xiaoqinling Mountains, China. MARINE POLLUTION BULLETIN 2024; 205:116621. [PMID: 38964187 DOI: 10.1016/j.marpolbul.2024.116621] [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: 03/12/2024] [Revised: 05/21/2024] [Accepted: 06/16/2024] [Indexed: 07/06/2024]
Abstract
The water and sediment samples were collected from the Yu River and Taowanbei River during periods of summer and winter. The NCPI, EWQI, Igeoand PERI were used to evaluate the pollution degree and cumulative ecological risk of HMs in the water and sediments. The PMF model was used to analyze the sources of HMs in river sediments. The pollution degree of Cd, Hg and Zn in the water reached the severe pollution level, in the rank of Hg > Zn > Cd. Cd and Zn in sediments are heavily polluted, Cu is lightly polluted, Pb and As are within the warning range, and the pollution rank is Cd > Zn > Cu > Pb > As. The cumulative ecological risk of HMs in sediments reached extremely strong level, mainly Cd and Hg. The main sources of HMs in sediments are mining sources, mixed agricultural and transport sources, and natural sources, which contributed 42.1 %, 34.1 % and 23.8 %, respectively.
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Affiliation(s)
- Zhenyu Chen
- Northwest Geological Science and Technology Innovation Center, Xi'an Geological Survey Center, China Geological Survey, Xi'an 710054, China; Geological Research Centre for Orogenic Zones, China Geological Survey, Xi'an 710054, China
| | - Yuanyi Zhao
- MNR Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China
| | - Nan Liang
- Northwest Geological Science and Technology Innovation Center, Xi'an Geological Survey Center, China Geological Survey, Xi'an 710054, China; Geological Research Centre for Orogenic Zones, China Geological Survey, Xi'an 710054, China
| | - Yuan Yao
- Northwest Geological Science and Technology Innovation Center, Xi'an Geological Survey Center, China Geological Survey, Xi'an 710054, China; Geological Research Centre for Orogenic Zones, China Geological Survey, Xi'an 710054, China
| | - Yu Zhao
- Northwest Geological Science and Technology Innovation Center, Xi'an Geological Survey Center, China Geological Survey, Xi'an 710054, China; Geological Research Centre for Orogenic Zones, China Geological Survey, Xi'an 710054, China.
| | - Tuo Liu
- Northwest Geological Science and Technology Innovation Center, Xi'an Geological Survey Center, China Geological Survey, Xi'an 710054, China
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Zuo T, Luo F, Suo Y, Chang Y, Wang Z, Jin H, Yu J, Xing S, Guo Y, Wang D, Wei F, Wang G, Sun L, Ma S. Refined Cumulative Risk Assessment of Pb, Cd, and as in TCM Decoction Based on Bioavailability through In Vitro Digestion/MDCK Cells. TOXICS 2024; 12:528. [PMID: 39058180 PMCID: PMC11281054 DOI: 10.3390/toxics12070528] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2024] [Revised: 06/29/2024] [Accepted: 07/04/2024] [Indexed: 07/28/2024]
Abstract
In this study, the oral bioavailability of Pb, Cd, and As in three types of traditional Chinese medicines (TCMs) and TCM decoctions were investigated through in vitro PBET digestion/MDKC cell model. Furthermore, a novel cumulative risk assessment model associated with co-exposure of heavy metal(loid)s in TCM and TCM decoction based on bioavailability was developed using hazard index (HI) for rapid screening and target organ toxicity dose modification of the HI (TTD) method for precise assessment. The results revealed that the bioavailability of Pb, Cd, and As in three types of TCM and TCM decoction was 5.32-72.49% and 4.98-51.97%, respectively. After rapid screening of the co-exposure health risks of heavy metal(loid)s by the HI method, cumulative risk assessment results acquired by TTD method based on total metal contents in TCMs indicated that potential health risks associated with the co-exposure of Pb, Cd, and As in Pheretima aspergillum (E. Perrier) and Oldenlandia diffusa (Willd.) Roxb were of concern. However, considering both the factors of decoction and bioavailability, TTD-adjusted HI outcomes for TCMs in this study were <1, indicating acceptable health risks. Collectively, our innovation on cumulative risk assessment of TCM and TCM decoction provides a novel strategy with the main purpose of improving population health.
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Affiliation(s)
- Tiantian Zuo
- National Key Laboratory of Drug Regulatory Science, National Institutes for Food and Drug Control, Beijing 100050, China; (T.Z.); (F.L.); (Y.S.); (Y.C.); (Z.W.); (H.J.); (J.Y.); (S.X.); (Y.G.); (D.W.); (G.W.); (L.S.)
| | - Feiya Luo
- National Key Laboratory of Drug Regulatory Science, National Institutes for Food and Drug Control, Beijing 100050, China; (T.Z.); (F.L.); (Y.S.); (Y.C.); (Z.W.); (H.J.); (J.Y.); (S.X.); (Y.G.); (D.W.); (G.W.); (L.S.)
| | - Yaqiong Suo
- National Key Laboratory of Drug Regulatory Science, National Institutes for Food and Drug Control, Beijing 100050, China; (T.Z.); (F.L.); (Y.S.); (Y.C.); (Z.W.); (H.J.); (J.Y.); (S.X.); (Y.G.); (D.W.); (G.W.); (L.S.)
| | - Yan Chang
- National Key Laboratory of Drug Regulatory Science, National Institutes for Food and Drug Control, Beijing 100050, China; (T.Z.); (F.L.); (Y.S.); (Y.C.); (Z.W.); (H.J.); (J.Y.); (S.X.); (Y.G.); (D.W.); (G.W.); (L.S.)
| | - Zhao Wang
- National Key Laboratory of Drug Regulatory Science, National Institutes for Food and Drug Control, Beijing 100050, China; (T.Z.); (F.L.); (Y.S.); (Y.C.); (Z.W.); (H.J.); (J.Y.); (S.X.); (Y.G.); (D.W.); (G.W.); (L.S.)
| | - Hongyu Jin
- National Key Laboratory of Drug Regulatory Science, National Institutes for Food and Drug Control, Beijing 100050, China; (T.Z.); (F.L.); (Y.S.); (Y.C.); (Z.W.); (H.J.); (J.Y.); (S.X.); (Y.G.); (D.W.); (G.W.); (L.S.)
| | - Jiandong Yu
- National Key Laboratory of Drug Regulatory Science, National Institutes for Food and Drug Control, Beijing 100050, China; (T.Z.); (F.L.); (Y.S.); (Y.C.); (Z.W.); (H.J.); (J.Y.); (S.X.); (Y.G.); (D.W.); (G.W.); (L.S.)
| | - Shuxia Xing
- National Key Laboratory of Drug Regulatory Science, National Institutes for Food and Drug Control, Beijing 100050, China; (T.Z.); (F.L.); (Y.S.); (Y.C.); (Z.W.); (H.J.); (J.Y.); (S.X.); (Y.G.); (D.W.); (G.W.); (L.S.)
| | - Yuansheng Guo
- National Key Laboratory of Drug Regulatory Science, National Institutes for Food and Drug Control, Beijing 100050, China; (T.Z.); (F.L.); (Y.S.); (Y.C.); (Z.W.); (H.J.); (J.Y.); (S.X.); (Y.G.); (D.W.); (G.W.); (L.S.)
| | - Dandan Wang
- National Key Laboratory of Drug Regulatory Science, National Institutes for Food and Drug Control, Beijing 100050, China; (T.Z.); (F.L.); (Y.S.); (Y.C.); (Z.W.); (H.J.); (J.Y.); (S.X.); (Y.G.); (D.W.); (G.W.); (L.S.)
| | - Feng Wei
- National Key Laboratory of Drug Regulatory Science, National Institutes for Food and Drug Control, Beijing 100050, China; (T.Z.); (F.L.); (Y.S.); (Y.C.); (Z.W.); (H.J.); (J.Y.); (S.X.); (Y.G.); (D.W.); (G.W.); (L.S.)
| | - Gangli Wang
- National Key Laboratory of Drug Regulatory Science, National Institutes for Food and Drug Control, Beijing 100050, China; (T.Z.); (F.L.); (Y.S.); (Y.C.); (Z.W.); (H.J.); (J.Y.); (S.X.); (Y.G.); (D.W.); (G.W.); (L.S.)
| | - Lei Sun
- National Key Laboratory of Drug Regulatory Science, National Institutes for Food and Drug Control, Beijing 100050, China; (T.Z.); (F.L.); (Y.S.); (Y.C.); (Z.W.); (H.J.); (J.Y.); (S.X.); (Y.G.); (D.W.); (G.W.); (L.S.)
| | - Shuangcheng Ma
- National Key Laboratory of Drug Regulatory Science, National Institutes for Food and Drug Control, Beijing 100050, China; (T.Z.); (F.L.); (Y.S.); (Y.C.); (Z.W.); (H.J.); (J.Y.); (S.X.); (Y.G.); (D.W.); (G.W.); (L.S.)
- Chinese Pharmacopeia Commission, Beijing 100061, China
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Tuo P, Zhang Z, Du P, Hu L, Li R, Ren J. Changes in coal waste DOM chemodiversity and Fe/Al oxides during weathering drive the fraction conversion of heavy metals. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 926:172063. [PMID: 38552975 DOI: 10.1016/j.scitotenv.2024.172063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Revised: 03/14/2024] [Accepted: 03/26/2024] [Indexed: 04/06/2024]
Abstract
The long-term accumulation of coal waste on the surface during natural weathering leads to the inevitable migration of heavy metals contained in the coal waste, which increases the likelihood of environmental contamination and health risks. Dissolved organic matter (DOM) and Fe/Al oxides play crucial roles in the transformation and bioavailability of heavy metals. Thus, we analyzed the Fe/Al oxide content and DOM molecular composition in coal waste with different degrees of weathering and explored the influence of DOM chemical diversity and Fe/Al oxides on the potential mobility of heavy metals. Results showed that weathering-driven decrease in Fe oxides (Fed, FeO, and Fep decreased from 82.4, 37.5, and 3.6 mg∙L-1 to 41.3, 24.7, and 2.3 mg∙L-1, respectively) led to decreases in the reducible fractions of V and Cr. The potential environmental risks of more toxic metals of Cd and As, also increased as a result of the residual fractions decreased to 32.6 % and 41.3 %, respectively. Weathering caused an increase in oxygen-to‑carbon ratio, double-bond equivalent, modified aromaticity index, nominal oxidation state of carbon, and molecular diversity and a decrease in (m/z)w and (H/C)w, suggesting that the DOM of highly weathered coal waste possessed high unsaturation, aromatic structures, hydrophilicity, and strong oxidative characteristics. Additionally, although VMF and CrMF showed significant negative correlations with O/C ratio, polyphenolic, carbohydrates, and condensed aromatics, pH remained a key environmental factor determining the potential environmental risks of V and Cr by changing the residual fractions. The mobilities of Cd and As were significantly negatively correlated with those of Fe/Al oxides, particularly Fed, FeO, Fep, and Alp. Our findings contribute to the understanding of the impact of weathering on the geochemical cycling of different coal waste components, providing priority options for environmental risk prevention and control in coal mining areas.
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Affiliation(s)
- Pinpeng Tuo
- Collaborative Innovation Center for Grassland Ecological Security Jointly Supported by the Ministry of Education of China and Inner Mongolia Autonomous Region, School of Ecology and Environment, Inner Mongolia University, Hohhot 010021, China
| | - Zongpeng Zhang
- Collaborative Innovation Center for Grassland Ecological Security Jointly Supported by the Ministry of Education of China and Inner Mongolia Autonomous Region, School of Ecology and Environment, Inner Mongolia University, Hohhot 010021, China
| | - Ping Du
- Technical Centre for Soil, Agricultural and Rural Ecology and Environment, Ministry of Ecology and Environment, Beijing 100012, China
| | - Lijuan Hu
- Collaborative Innovation Center for Grassland Ecological Security Jointly Supported by the Ministry of Education of China and Inner Mongolia Autonomous Region, School of Ecology and Environment, Inner Mongolia University, Hohhot 010021, China
| | - Renyou Li
- Collaborative Innovation Center for Grassland Ecological Security Jointly Supported by the Ministry of Education of China and Inner Mongolia Autonomous Region, School of Ecology and Environment, Inner Mongolia University, Hohhot 010021, China; Technical Centre for Soil, Agricultural and Rural Ecology and Environment, Ministry of Ecology and Environment, Beijing 100012, China
| | - Jie Ren
- Collaborative Innovation Center for Grassland Ecological Security Jointly Supported by the Ministry of Education of China and Inner Mongolia Autonomous Region, School of Ecology and Environment, Inner Mongolia University, Hohhot 010021, China.
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5
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Zhang Z, Lou S, Liu S, Zhou X, Zhou F, Yang Z, Chen S, Zou Y, Radnaeva LD, Nikitina E, Fedorova IV. Potential risk assessment and occurrence characteristic of heavy metals based on artificial neural network model along the Yangtze River Estuary, China. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:32091-32110. [PMID: 38648002 DOI: 10.1007/s11356-024-33400-z] [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: 12/17/2023] [Accepted: 04/16/2024] [Indexed: 04/25/2024]
Abstract
Pollution from heavy metals in estuaries poses potential risks to the aquatic environment and public health. The complexity of the estuarine water environment limits the accurate understanding of its pollution prediction. Field observations were conducted at seven sampling sites along the Yangtze River Estuary (YRE) during summer, autumn, and winter 2021 to analyze the concentrations of seven heavy metals (As, Cd, Cr, Pb, Cu, Ni, Zn) in water and surface sediments. The order of heavy metal concentrations in water samples from highest to lowest was Zn > As > Cu > Ni > Cr > Pb > Cd, while that in surface sediments samples was Zn > Cr > As > Ni > Pb > Cu > Cd. Human health risk assessment of the heavy metals in water samples indicated a chronic and carcinogenic risk associated with As. The risks of heavy metals in surface sediments were evaluated using the geo-accumulation index (Igeo) and potential ecological risk index (RI). Among the seven heavy metals, As and Cd were highly polluted, with Cd being the main contributor to potential ecological risks. Principal component analysis (PCA) was employed to identify the sources of the different heavy metals, revealing that As originated primarily from anthropogenic emissions, while Cd was primarily from atmospheric deposition. To further analyze the influence of water quality indicators on heavy metal pollution, an artificial neural network (ANN) model was utilized. A modified model was proposed, incorporating biochemical parameters to predict the level of heavy metal pollution, achieving an accuracy of 95.1%. This accuracy was 22.5% higher than that of the traditional model and particularly effective in predicting the maximum 20% of values. Results in this paper highlight the pollution of As and Cd along the YRE, and the proposed model provides valuable information for estimating heavy metal pollution in estuarine water environments, facilitating pollution prevention efforts.
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Affiliation(s)
- Zhirui Zhang
- Department of Hydraulic Engineering, Tongji University, Shanghai, 200092, China
| | - Sha Lou
- Department of Hydraulic Engineering, Tongji University, Shanghai, 200092, China.
- Key Laboratory of Yangtze River Water Environment, Ministry of Education, Tongji University, Shanghai, 200092, China.
| | - Shuguang Liu
- Department of Hydraulic Engineering, Tongji University, Shanghai, 200092, China
- Key Laboratory of Yangtze River Water Environment, Ministry of Education, Tongji University, Shanghai, 200092, China
| | - Xiaosheng Zhou
- Department of Hydraulic Engineering, Tongji University, Shanghai, 200092, China
| | - Feng Zhou
- Department of Hydraulic Engineering, Tongji University, Shanghai, 200092, China
| | - Zhongyuan Yang
- Department of Hydraulic Engineering, Tongji University, Shanghai, 200092, China
| | - Shizhe Chen
- Department of Hydraulic Engineering, Tongji University, Shanghai, 200092, China
| | - Yuwen Zou
- Department of Hydraulic Engineering, Tongji University, Shanghai, 200092, China
| | - Larisa Dorzhievna Radnaeva
- Laboratory of Chemistry of Natural Systems, Baikal Institute of Nature Management of Siberian Branch of the Russian Academy of Sciences, Ulan-Ude, Republic of Buryatia, Russia
| | - Elena Nikitina
- Laboratory of Chemistry of Natural Systems, Baikal Institute of Nature Management of Siberian Branch of the Russian Academy of Sciences, Ulan-Ude, Republic of Buryatia, Russia
| | - Irina Viktorovna Fedorova
- Institute of Earth Sciences, Saint Petersburg State University, 7-9 Universitetskaya Embankment, 199034, St Petersburg, Russia
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Deng J, Li Z, Li B, Xu C, Wang L, Li Y. Wide Riparian Zones Inhibited Trace Element Loss in Mining Wastelands by Reducing Surface Runoff and Trace Elements in Sediment. TOXICS 2024; 12:279. [PMID: 38668502 PMCID: PMC11053404 DOI: 10.3390/toxics12040279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2024] [Revised: 04/05/2024] [Accepted: 04/08/2024] [Indexed: 04/29/2024]
Abstract
The diffusion of trace elements in mining wastelands has attracted widespread attention in recent years. Vegetation restoration is an effective measure for controlling the surface migration of trace elements. However, there is no field evidence of the effective riparian zone width in mining wastelands. Three widths (5 m, 7.5 m, and 10 m) of Rhododendron simsii/Lolium perenne L. riparian zones were constructed in lead-zinc mining wastelands to investigate the loss of soil, cadmium (Cd), copper (Cu), arsenic (As), lead (Pb), and zinc (Zn). Asbestos tiles were used to cut off connections between adjacent plots to avoid hydrological interference. Plastic pipes and containers were used to collect runoff water. Results showed that more than 90% of trace elements were lost in sediment during low coverage and heavy rainfall periods. Compared with the 5 m riparian zone, the total trace element loss was reduced by 69-85% during the whole observation period in the 10 m riparian zone and by 86-99% during heavy rain periods in the 10 m riparian zone, which was due to reduction in runoff and concentrations of sediment and trace elements in the 10 m riparian zone. Indirect negative effects of riparian zone width on trace element loss through runoff and sediment concentration were found. These results indicated that the wide riparian zone promoted water infiltration, filtered soil particles, and reduced soil erosion and trace element loss. Riparian zones can be used as environmental management measures after mining areas are closed to reduce the spread of environmental risks in mining wastelands, although the long-term effects remain to be determined.
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Affiliation(s)
- Jiangdi Deng
- Faculty of Animal Science and Technology, Yunnan Agricultural University, Kunming 650201, China; (J.D.); (C.X.)
| | - Zuran Li
- College of Horticulture and Landscape, Yunnan Agricultural University, Kunming 650201, China;
| | - Bo Li
- College of Resources and Environment, Yunnan Agricultural University, Kunming 650201, China; (B.L.); (L.W.)
| | - Cui Xu
- Faculty of Animal Science and Technology, Yunnan Agricultural University, Kunming 650201, China; (J.D.); (C.X.)
| | - Lei Wang
- College of Resources and Environment, Yunnan Agricultural University, Kunming 650201, China; (B.L.); (L.W.)
| | - Yuan Li
- College of Resources and Environment, Yunnan Agricultural University, Kunming 650201, China; (B.L.); (L.W.)
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Li L, Wu B, Guo S, Hu E, Zhang Y, Sun L, Li S. Multipath diffusion process and spatial accumulation simulation of Cd in lead-zinc mining areas. JOURNAL OF HAZARDOUS MATERIALS 2024; 465:133461. [PMID: 38211526 DOI: 10.1016/j.jhazmat.2024.133461] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Revised: 12/16/2023] [Accepted: 01/04/2024] [Indexed: 01/13/2024]
Abstract
This study combined process simulation and actual measurement to construct a multipath diffusion and spatial accumulation model of Cd in a typical lead-zinc mining area through accuracy and root mean square error(RMSE) analysis. The results indicated that (1) the diffusion of Cd was in a quadratic inverse proportional relationship with the distance from the pollution source within watershed. The average annual atmospheric Cd sedimentation in study area was 0.71 * 10-6 g and the contribution of runoff diffusion to Cd exceeded 80%. (2) With the increase in the concentration range of Cd content (k) carried by unit runoff sediment, the model accuracy and RMSE showed decreasing trends. However, when the lower and upper limits of k were 10% and 90%, the model accuracy reached 75%. (3) Two sub-watersheds with same dominant wind direction but different runoff directions were selected to verify the model accuracy, indicating that the model construction method can precisely simulate the spatial accumulation of Cd in similar mining areas. The results provide a scientific basis for the prevention of heavy metal diffusion in lead-zinc mines. Future research should focus on the migration pathways of heavy metals through vertical infiltration caused by rainfall to further optimise the model structure and accuracy.
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Affiliation(s)
- Linlin Li
- Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Bo Wu
- Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, PR China; National-Local Joint Engineering Laboratory of Contaminated Soil Remediation by Bio-physicochemical Synergistic Process, Shenyang 110016, PR China.
| | - Shuhai Guo
- Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, PR China; National-Local Joint Engineering Laboratory of Contaminated Soil Remediation by Bio-physicochemical Synergistic Process, Shenyang 110016, PR China
| | - Enzhu Hu
- Institute of Resources and Environmental Sciences, School of Metallurgy, Northeastern University, Shenyang 110819, PR China
| | - Yunlong Zhang
- Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Lixia Sun
- Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, PR China; Institute of Resources and Environmental Sciences, School of Metallurgy, Northeastern University, Shenyang 110819, PR China
| | - Shuqi Li
- Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China
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Zhu S, Zhang Z, Wen C, Zhu S, Li C, Xu H, Luo X. Transport and transformations of cadmium in water-biofilm-sediment phases as affected by hydrodynamic conditions. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 354:120368. [PMID: 38394874 DOI: 10.1016/j.jenvman.2024.120368] [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: 08/12/2023] [Revised: 01/08/2024] [Accepted: 02/08/2024] [Indexed: 02/25/2024]
Abstract
Hydrodynamic conditions play a crucial role in governing the fate, transport, and risks of metal elements. However, the contribution of hydrodynamic conditions to the fate and transport of heavy metals among water, sediment, and biofilm phases is poorly understood. In our study, we conducted experiments in controlled hydrodynamic conditions using a total of 6 two-phase and 9 three-phase mesocosms consisting of water, biofilm, and sediment. We also measured Cd (cadmium) specification in different phases to assess how hydrodynamic forces control Cd bioavailability. We found that turbulent flow destroyed the surface morphology of the biofilm and significantly decreased the content of extracellular polymeric substances (p < 0.05). This led to a decrease in the biofilm's adsorption capacity for Cd, with the maximum adsorption capacity (0.124 mg/g) being one-tenth of that under static conditions (1.256 mg/g). The Cd chemical forms in the biofilm and sediment were significantly different, with the highest amount of Cd in the biofilm being acid-exchangeable, accounting for up to 95.1% of the total Cd content. Cd was more easily released in the biofilm due to its weak binding state, while Cd in the sediment existed in more stable chemical forms. Hydrodynamic conditions altered the migration behavior and distribution characteristics of Cd in the system by changing the adsorption capacity of the biofilm and sediment for Cd. Cd mobility increased in laminar flow but decreased in turbulent flow. These results enhance our understanding of the underlying mechanisms that control the mobility and bioavailability of metals in aquatic environments with varying hydrodynamic conditions.
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Affiliation(s)
- Shijun Zhu
- Institute of International Rivers and Eco-Security, Yunnan University, Kunming 650500, China; Yunnan Key Laboratory of International Rivers and Transboundary Eco-Security, Kunming 650500, China
| | - Zixiang Zhang
- Institute of International Rivers and Eco-Security, Yunnan University, Kunming 650500, China
| | - Chen Wen
- Institute of International Rivers and Eco-Security, Yunnan University, Kunming 650500, China; Yunnan Key Laboratory of International Rivers and Transboundary Eco-Security, Kunming 650500, China
| | - Shiqi Zhu
- Institute of International Rivers and Eco-Security, Yunnan University, Kunming 650500, China; Yunnan Key Laboratory of International Rivers and Transboundary Eco-Security, Kunming 650500, China
| | - Chunyan Li
- Institute of International Rivers and Eco-Security, Yunnan University, Kunming 650500, China; Yunnan Key Laboratory of International Rivers and Transboundary Eco-Security, Kunming 650500, China
| | - Hansen Xu
- Institute of International Rivers and Eco-Security, Yunnan University, Kunming 650500, China; Yunnan Key Laboratory of International Rivers and Transboundary Eco-Security, Kunming 650500, China
| | - Xia Luo
- Institute of International Rivers and Eco-Security, Yunnan University, Kunming 650500, China; Yunnan Key Laboratory of International Rivers and Transboundary Eco-Security, Kunming 650500, China.
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Chen T, Wen X, Zhou J, Lu Z, Li X, Yan B. A critical review on the migration and transformation processes of heavy metal contamination in lead-zinc tailings of China. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 338:122667. [PMID: 37783414 DOI: 10.1016/j.envpol.2023.122667] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Revised: 09/11/2023] [Accepted: 09/29/2023] [Indexed: 10/04/2023]
Abstract
The health risks of lead-zinc (Pb-Zn) tailings from heavy metal (HMs) contamination have been gaining increasing public concern. The dispersal of HMs from tailings poses a substantial threat to ecosystems. Therefore, studying the mechanisms of migration and transformation of HMs in Pb-Zn tailings has significant ecological and environmental significance. Initially, this study encapsulated the distribution and contamination status of Pb-Zn tailings in China. Subsequently, we comprehensively scrutinized the mechanisms governing the migration and transformation of HMs in the Pb-Zn tailings from a geochemical perspective. This examination reveals the intricate interplay between various biotic and abiotic constituents, including environmental factors (EFs), characteristic minerals, organic flotation reagents (OFRs), and microorganisms within Pb-Zn tailings interact through a series of physical, chemical, and biological processes, leading to the formation of complexes, chelates, and aggregates involving HMs and OFRs. These interactions ultimately influence the migration and transformation of HMs. Finally, we provide an overview of contaminant migration prediction and ecological remediation in Pb-Zn tailings. In this systematic review, we identify several forthcoming research imperatives and methodologies. Specifically, understanding the dynamic mechanisms underlying the migration and transformation of HMs is challenging. These challenges encompass an exploration of the weathering processes of characteristic minerals and their interactions with HMs, the complex interplay between HMs and OFRs in Pb-Zn tailings, the effects of microbial community succession during the storage and remediation of Pb-Zn tailings, and the importance of utilizing process-based models in predicting the fate of HMs, and the potential for microbial remediation of tailings.
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Affiliation(s)
- Tao Chen
- SCNU Environmental Research Institute, Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety & MOE Key Laboratory of Theoretical Chemistry of Environment, School of Environment, South China Normal University, University Town, Guangzhou, 510006, China.
| | - Xiaocui Wen
- SCNU Environmental Research Institute, Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety & MOE Key Laboratory of Theoretical Chemistry of Environment, School of Environment, South China Normal University, University Town, Guangzhou, 510006, China
| | - Jiawei Zhou
- SCNU Environmental Research Institute, Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety & MOE Key Laboratory of Theoretical Chemistry of Environment, School of Environment, South China Normal University, University Town, Guangzhou, 510006, China
| | - Zheng Lu
- State Key Laboratory of Earth Surface Processes and Resource Ecology, Faculty of Geographical Science, Beijing Normal University, Beijing, 100875, China
| | - Xueying Li
- State Key Laboratory of Earth Surface Processes and Resource Ecology, Faculty of Geographical Science, Beijing Normal University, Beijing, 100875, China
| | - Bo Yan
- SCNU Environmental Research Institute, Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety & MOE Key Laboratory of Theoretical Chemistry of Environment, School of Environment, South China Normal University, University Town, Guangzhou, 510006, China
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