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Santos TTL, Mounier JLS, Marins RV. Trace metal partitioning in the parnaíba delta in dry season, equatorial coast of Brazil. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024; 345:123500. [PMID: 38320685 DOI: 10.1016/j.envpol.2024.123500] [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: 08/18/2023] [Revised: 01/14/2024] [Accepted: 02/03/2024] [Indexed: 02/08/2024]
Abstract
Trace metal concentrations in the particulate fractions (MP), dissolved fractions (MD) and sediments (MS), such as Ba, Cu, Co, Cr, Pb, Ni and Zn, were determined during the dry season of the largest open sea delta of Americas, the Parnaíba River Delta (Brazil). This study aimed to comprehend the distribution, dynamic changes of metal speciation and environmental quality index of trace metals in the particulate fractions and subsurface sediments in scenario of major marine influence over the delta. The trace metals bound to suspended particulate material (SPM) from weathering the drainage basin exhibited a removal trend under increases in salinity and pH. Desorption influenced the partitioning of BaMP, ZnMP, NiMP, CoMP, CuMP, and the adsorption and precipitation of PbMP and CrMP to the surface sediments. The organic matter contents in the sediments acts as an important geochemical carrier of these contaminants, and the dissolved organic carbon influences the binding of PbMD in the subsurface waters. The geoaccumulation index (Igeo) plays a crucial role in revealing potential contamination with ZnMP contents and weak association to this fraction. These results make possible the assessment of ecological risk by metal contamination and global pollution mitigation in coastal tidal estuaries under intensive physical mixing along the equatorial coast.
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Affiliation(s)
- Thays Thayanne Luz Santos
- Federal University of Ceará, Marine Science Institute/LABOMAR, Av. da Abolição, 3207, 60.165-081, Fortaleza, CE, Brazil; Université de Toulon, Aix Marseille Univ., CNRS/INSU, IRD, MIO UM 110, Mediterranean Institute of Oceanography, CS, 60584, 83041, Toulon, France.
| | - Jean Louis Stéphane Mounier
- Université de Toulon, Aix Marseille Univ., CNRS/INSU, IRD, MIO UM 110, Mediterranean Institute of Oceanography, CS, 60584, 83041, Toulon, France.
| | - Rozane Valente Marins
- Federal University of Ceará, Marine Science Institute/LABOMAR, Av. da Abolição, 3207, 60.165-081, Fortaleza, CE, Brazil.
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2
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Wang P, Hu J, Liu T, Liu J, Ma S, Ma W, Li J, Zheng H, Lu R. Advances in the application of metallic isotopes to the identification of contaminant sources in environmental geochemistry. JOURNAL OF HAZARDOUS MATERIALS 2023; 458:131913. [PMID: 37392646 DOI: 10.1016/j.jhazmat.2023.131913] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Revised: 06/03/2023] [Accepted: 06/20/2023] [Indexed: 07/03/2023]
Abstract
The development of the economy and society makes heavy metals (HMs) pollution more and more serious. And, pollution source identification is the primary work of environmental pollution control and land planning. Notably, stable isotope technology has a high ability to distinguish pollution sources, and can better reflect the migration behavior and contribution of HMs from diverse sources, which has become a hot research tool for pollution source identification of HMs. Currently, the rapid development of isotope analysis technology provides a relatively reliable reference for pollution tracking. Based on this background, the fractionation mechanism of stable isotopes and the influence of environmental processes on isotope fractionation are reviewed. Furthermore, the processes and requirements for the measurement of metal stable isotope ratios are summarized, and the calibration methods and detection accuracy of sample measurement are evaluated. Besides, the current commonly used binary model and multi-mixed models in the identification of contaminant sources are also concluded. Moreover, the isotopic changes of different metallic elements under natural and anthropogenic conditions are discussed in detail, and the application prospects of multi-isotope coupling in the traceability of environmental geochemistry are evaluated. This work has some guidance for the application of stable isotopes in the source identification of environmental pollution.
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Affiliation(s)
- Peng Wang
- Institute of Earth Sciences, China University of Geosciences (Beijing), Beijing 100083, PR China
| | - Jian Hu
- The State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, PR China; Chinese Academy of Sciences, Beijing 100085, PR China.
| | - Tingyi Liu
- Tianjin Key Laboratory of Water Resources and Environment, Tianjin Normal University, Tianjin 300387, PR China
| | - Jinke Liu
- Institute of Earth Sciences, China University of Geosciences (Beijing), Beijing 100083, PR China
| | - Shunrong Ma
- Institute of Earth Sciences, China University of Geosciences (Beijing), Beijing 100083, PR China
| | - Wenmin Ma
- Tianjin Key Laboratory of Water Resources and Environment, Tianjin Normal University, Tianjin 300387, PR China
| | - Jun Li
- The State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, PR China; Chinese Academy of Sciences, Beijing 100085, PR China
| | - Houyi Zheng
- China Chemical Geology and Mine Bureau, Beijing 10013, PR China
| | - Ran Lu
- Research Center of Heavy Metal Pollution Prevention and Control, Chinese Academy for Environmental Planning, Beijing 100012, PR China
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3
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Yan X, Li W, Zhu C, Peacock CL, Liu Y, Li H, Zhang J, Hong M, Liu F, Yin H. Zinc Stable Isotope Fractionation Mechanisms during Adsorption on and Substitution in Iron (Hydr)oxides. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:6636-6646. [PMID: 37042830 DOI: 10.1021/acs.est.2c08028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/19/2023]
Abstract
The Zn isotope fingerprint is widely used as a proxy of various environmental geochemical processes, so it is crucial to determine which are the mechanisms responsible for isotopic fractionation. Iron (Fe) (hydr)oxides greatly control the cycling and fate and thus isotope fractionation factors of Zn in terrestrial environments. Here, Zn isotope fractionation and related mechanisms during adsorption on and substitution in three FeOOH polymorphs are explored. Results demonstrate that heavy Zn isotopes are preferentially enriched onto solids, with almost similar isotopic offsets (Δ66/64Znsolid-solution = 0.25-0.36‰) for goethite, lepidocrocite, and feroxyhyte. This is consistent with the same average Zn-O bond lengths for adsorbed Zn on these solids as revealed by Zn K-edge X-ray absorption fine structure spectroscopy. In contrast, at an initial Zn/Fe molar ratio of 0.02, incorporation of Zn into goethite and lepidocrocite by substituting for lattice Fe preferentially sequesters light Zn isotopes with Δ66/64Znsubstituted-stock solution of -1.52 ± 0.09‰ and -1.18 ± 0.15‰, while Zn-substituted feroxyhyte (0.06 ± 0.11‰) indicates almost no isotope fractionation. This is closely related to the different crystal nucleation and growth rates during the Zn-doped FeOOH formation processes. These results provide direct experimental evidence of incorporation of isotopically light Zn into Fe (hydr)oxides and improve our understanding of Zn isotope fractionation mechanisms during mineral-solution interface processes.
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Affiliation(s)
- Xinran Yan
- Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtse River), Ministry of Agriculture and Rural Affairs, College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China
| | - Wei Li
- Key Laboratory of Surficial Geochemistry, Ministry of Education, School of Earth Sciences and Engineering, Nanjing University, Nanjing, Jiangsu 210023, China
| | - Chuanwei Zhu
- State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, Guizhou 550002, China
| | | | - Yizhang Liu
- State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, Guizhou 550002, China
| | - Hui Li
- Department of Crop and Soil Sciences, North Carolina State University, Raleigh, North Carolina 27695, United States
| | - Jing Zhang
- Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100039, China
| | - Mei Hong
- College of Grassland, Resources and Environment, Inner Mongolia Agricultural University, Hohhot 010018, China
| | - Fan Liu
- Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtse River), Ministry of Agriculture and Rural Affairs, College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China
| | - Hui Yin
- Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtse River), Ministry of Agriculture and Rural Affairs, College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China
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Zhang L, Wu Y, Ni Z, Li J, Ren Y, Lin J, Huang X. Saltwater intrusion regulates the distribution and partitioning of heavy metals in water in a dynamic estuary, South China. MARINE ENVIRONMENTAL RESEARCH 2023; 186:105943. [PMID: 36907080 DOI: 10.1016/j.marenvres.2023.105943] [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: 10/29/2022] [Revised: 02/11/2023] [Accepted: 03/07/2023] [Indexed: 06/18/2023]
Abstract
The mixing processes of fresh-salt water in estuarine and coastal regions have a substantial impact on the characteristics of heavy metals. A study was conducted in the Pearl River Estuary (PRE), located in South China, to examine the distribution and partitioning of heavy metals and the factors that influence their presence. Results showed that the hydrodynamic force, caused by the landward intrusion of the salt wedge, was the major contributor to the aggregation of heavy metals in the northern and western PRE. Conversely, metals were diffused seaward at lower concentrations along the plume flow in surface water. The study found that some metals, including Fe, Mn, Zn and Pb, were significantly higher in surface water than in bottom water in eastern waters, but the reverse was true in the southern offshore area, where limited mixing hindered the vertical transfer of metals in the water column. The partitioning coefficients (KD) of metals varied, with Fe exhibiting the highest KD (1038 ± 1093 L/g), followed by Zn (579 ± 482 L/g) and Mn (216 ± 224). The highest KD values of metals in surface water were observed in the west coast, while the highest KD in bottom water was found in eastern areas. Furthermore, re-suspension of sediment and the mixing of seawater and freshwater offshore, caused by seawater intrusion, resulted in the partitioning of Cu, Ni and Zn towards particulate phases in offshore waters. This study provides valuable insights into the migration and transformation of heavy metals in dynamic estuaries influenced by the interaction of freshwater and saltwater and highlights the importance of continued research in this field.
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Affiliation(s)
- Ling Zhang
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, 511458, China; Guangdong Provincial Key Laboratory of Applied Marine Biology, Guangzhou, 510301, China
| | - Yunchao Wu
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, 511458, China; Guangdong Provincial Key Laboratory of Applied Marine Biology, Guangzhou, 510301, China
| | - Zhixin Ni
- Guangdong Provincial Key Laboratory of Applied Marine Biology, Guangzhou, 510301, China; South China Sea Environmental Monitoring Center, South China Sea Bureau, Ministry of Natural Resources, Guangzhou, 510300, China
| | - Jinlong Li
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, 511458, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Yuzheng Ren
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, 511458, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Jizhen Lin
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, 511458, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Xiaoping Huang
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, 511458, China; Guangdong Provincial Key Laboratory of Applied Marine Biology, Guangzhou, 510301, China; University of Chinese Academy of Sciences, Beijing, 100049, China.
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5
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Sun A, Wang WX. Insights into the kinetic regulation of Zn bioaccumulation at trace levels: Lighting up Saccharomycescerevisiae. CHEMOSPHERE 2022; 308:136318. [PMID: 36075365 DOI: 10.1016/j.chemosphere.2022.136318] [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: 06/23/2022] [Revised: 08/24/2022] [Accepted: 08/31/2022] [Indexed: 06/15/2023]
Abstract
Zn displays a double-edged effect by acting both as a micronutrient and a toxic metal, and quantitative analysis of its kinetic flux under low environmental concentrations is critical to understand its intracellular regulation. In the present study, we employed a Zn sensitive model eukaryote, the yeast Saccharomyces cerevisiae, which responded to intracellular Zn levels by increasing its autofluorescence, to quantify Zn influx, transportation between labile and storage pools, and efflux under different Zn exposure levels (<1 μM). We demonstrated that the yeast regulated Zn uptake from the extracellular source by a gradually decreased accumulation following an initial high accumulation rate. The subsequent reduced accumulation rate resulted in a steady-state Zn accumulation at 0.061 and 0.073 μg Zn/μg P as the threshold values for the control yeast and Zn-depleted yeast, respectively, independently of the extracellular Zn concentration. Compared with the control yeast, the Zn-depleted yeast possessed a higher accumulation rate, but the difference of bioaccumulation was maintained at approximately 0.01 μg Zn/μg P under different concentrations of extracellular Zn. In contrast, transportation between labile Zn and storage Zn pools or Zn efflux to the extracellular environment was not obvious after Zn exposure, indicating that the Zn dose was below a basal requirement. Such stabilized Zn accumulation was only induced by controlling the Zn influx at the bio-interface. With the novel monitoring of the kinetic changes of autofluorescence, our study demonstrated a remarkably tight Zn regulation system in yeast, providing enlightenment for Zn homeostasis in eukaryotes under low Zn exposure in aqueous environments.
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Affiliation(s)
- Anqi Sun
- Division of Life Science, The Hong Kong University of Science and Technology, Clearwater Bay, Kowloon, Hong Kong, China; School of Energy and Environment and State Key Laboratory of Marine Pollution, City University of Hong Kong, Kowloon, Hong Kong, China
| | - Wen-Xiong Wang
- School of Energy and Environment and State Key Laboratory of Marine Pollution, City University of Hong Kong, Kowloon, Hong Kong, China; Research Centre for the Oceans and Human Health, City University of Hong Kong Shenzhen Research Institute, Shenzhen, 518057, China.
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6
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Qin J, Yang Y, Xu N, Wang Q, Sun X. Occurrence, partition, and risk of four adjacent transition metals in seawater, sediments and demersal fish from the Pearl River Estuary, South China Sea. MARINE POLLUTION BULLETIN 2022; 184:114159. [PMID: 36166857 DOI: 10.1016/j.marpolbul.2022.114159] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Revised: 09/15/2022] [Accepted: 09/16/2022] [Indexed: 06/16/2023]
Abstract
The spatio-seasonal variation, bioaccumulation and potential ecological risk of four metals (Co, Ni, Cu and Zn) in the multi-media of the Pearl River Estuary (PRE) were assessed. The degree of contamination and ecological risk of the four metals followed this pattern: Cu > Zn > Ni > Co, upstream > downstream, wet season > dry season. There were non-linear and linear correlations for Co, linear and non-linear correlations for Ni, and non-linear and no correlation for both Cu and Zn, between metals in bottom water or bioavailable concentrations in sediment and fish muscle. Co and Ni showed lightly polluted levels; Cu and Zn showed heavily polluted levels. This study demonstrates a tendency of cross-accumulation in fish of these four transition metals within specific habitats of the PRE.
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Affiliation(s)
- Junlian Qin
- Institute of Hydrobiology, Jinan University, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Guangzhou 510632, China
| | - Yufeng Yang
- Institute of Hydrobiology, Jinan University, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Guangzhou 510632, China.
| | - Ning Xu
- Institute of Hydrobiology, Jinan University, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Guangzhou 510632, China
| | - Qing Wang
- Institute of Hydrobiology, Jinan University, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Guangzhou 510632, China
| | - Xian Sun
- School of Marine Sciences, Zhuhai Key Laboratory of Marine Bioresources and Environment, Guangdong Provincial, Key Laboratory of Marine Resources and Coastal Engineering, Pearl River Estuary Marine Ecosystem Research Station, Ministry of Education, Sun Yat-Sen University, Zhuhai 519082, China.
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7
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Wang D, Zheng L, Ren M, Li C, Dong X, Wei X, Zhou W, Cui J. Zinc in soil reflecting the intensive coal mining activities: Evidence from stable zinc isotopes analysis. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2022; 239:113669. [PMID: 35605319 DOI: 10.1016/j.ecoenv.2022.113669] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Revised: 05/04/2022] [Accepted: 05/17/2022] [Indexed: 06/15/2023]
Abstract
In the mining area affected by coal mining activities for a long time, heavy metal Zn pollution poses a serious threat to soil quality and human health, and direct evidence showing the relationship between Zn accumulation mechanism in soils and mining activities is lacking. In this study, the Zn content and isotopes composition (δ66Zn) from soil and environmental samples around mining area were determined and analyzed to clarify the Zn characteristics in soil. Moreover, the distribution and source of Zn content in soil of mining area were analyzed by mathematical statistics, correlation analysis and isotope mass mixing model. The results showed that: (1) the Zn content in soil ranged from 95 to 327 mg·kg-1 (mean: 233 mg·kg-1), exceeding the control point and the soil background value of Anhui Province; (2) the results of Zn isotope analysis showed that Zn in soil mainly derived from the wind dispersion input of fine particles in gangue and fly ash, followed by the natural weathering of parent material; (3) isotopic mass mixing model can be used to distinguish the contribution of anthropogenic and natural Zn sources. Mining input was the main contribution source of Zn in soil (mean: 67%), followed by natural background (mean: 33%). The employment of Zn isotopes can effectively evaluate the impact of anthropogenic and natural long-term processes on Zn in the soil of the mining area, and provide important information for the formulation of soil metal pollution control measures.
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Affiliation(s)
- Dandan Wang
- School of Resources and Environmental Engineering, Anhui University, Anhui Province Engineering Laboratory for Mine Ecological Remediation, Hefei 230601, Anhui, China
| | - Liugen Zheng
- School of Resources and Environmental Engineering, Anhui University, Anhui Province Engineering Laboratory for Mine Ecological Remediation, Hefei 230601, Anhui, China.
| | - Mengxi Ren
- School of Resources and Environmental Engineering, Anhui University, Anhui Province Engineering Laboratory for Mine Ecological Remediation, Hefei 230601, Anhui, China
| | - Chang Li
- School of Resources and Environmental Engineering, Anhui University, Anhui Province Engineering Laboratory for Mine Ecological Remediation, Hefei 230601, Anhui, China
| | - Xianglin Dong
- Geological Survey Division, Huaibei Coal Mining Group Corporation, Huaibei 235001, Anhui, China
| | - Xiangpin Wei
- Geological Survey Division, Huaibei Coal Mining Group Corporation, Huaibei 235001, Anhui, China
| | - Weijun Zhou
- Linhuan Coal Mine, Huaibei Coal Mining Group Corporation, Huaibei 235001, Anhui, China
| | - Jiasheng Cui
- Linhuan Coal Mine, Huaibei Coal Mining Group Corporation, Huaibei 235001, Anhui, China
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Shi C, He H, Xia Z, Gan H, Xue Q, Cui Z, Chen J. Heavy metals and Pb isotopes in a marine sediment core record environmental changes and anthropogenic activities in the Pearl River Delta over a century. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 814:151934. [PMID: 34843765 DOI: 10.1016/j.scitotenv.2021.151934] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2021] [Revised: 11/07/2021] [Accepted: 11/20/2021] [Indexed: 06/13/2023]
Abstract
Heavy metal accumulation in marine sediments is associated with changes in both the natural environment and human activities. This study used heavy metals and Pb isotopes in a precisely dated (by 210Pb and 137Cs) sediment core from the Macao Sea to reconstruct the historical changes in anthropogenic activities and the environment in the western Pearl River Estuary (PRE). The distribution of heavy metals in the sediment core could be divided into four stages (pre-1950, 1950-1976, 1976-2000, and post-2000), which corresponded to the changes in anthropogenic activities and environment of the Pearl River Delta during the past 100 years. The contribution of anthropogenic metals (Pb and Zn) in the sediments increased gradually over time. However, the concentrations, enrichment factors, and fluxes of heavy metals in the sediments all displayed a downward trend since 2010, revealing a decline in metal pollutant input due to strict emission reduction policies implemented in the last decade. The Pb isotopes in the sediments showed a similar trajectory to the heavy metals, reflecting the changes in Pb sources in the sediments at different stages. Based on a binary Pb isotope mixing model, the calculated proportions of anthropogenic and natural Pb in the sediments were 0-50.9% (mean 15.9%) and 49.1-100% (mean 84.1%), respectively, suggesting that the Pb in the PRE sediments is mainly controlled by natural sources.
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Affiliation(s)
- Cui Shi
- Guangzhou Marine Geological Survey, Guangzhou 510760, China; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou 511458, China; School of Geography and Planning, Sun Yat-Sen University, Guangzhou 510275, China.
| | - Haijun He
- Guangzhou Marine Geological Survey, Guangzhou 510760, China; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou 511458, China
| | - Zhen Xia
- Guangzhou Marine Geological Survey, Guangzhou 510760, China; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou 511458, China
| | - Huayang Gan
- Guangzhou Marine Geological Survey, Guangzhou 510760, China; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou 511458, China
| | - Qiao Xue
- Guangzhou Marine Geological Survey, Guangzhou 510760, China
| | - Zhenang Cui
- Guangzhou Marine Geological Survey, Guangzhou 510760, China
| | - Jianyao Chen
- School of Geography and Planning, Sun Yat-Sen University, Guangzhou 510275, China
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Wu W, Qu S, Nel W, Ji J. Tracing and quantifying the sources of heavy metals in the upper and middle reaches of the Pearl River Basin: New insights from Sr-Nd-Pb multi-isotopic systems. CHEMOSPHERE 2022; 288:132630. [PMID: 34695487 DOI: 10.1016/j.chemosphere.2021.132630] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Revised: 10/16/2021] [Accepted: 10/19/2021] [Indexed: 05/15/2023]
Abstract
A method based on Sr, Nd and Pb multi-isotopic systems indicates that the different rock types (carbonate rock, basalt and black rock series) and sulfide deposits exposed in the Pearl River Basin show markedly different Sr, Nd and Pb isotopic characteristics. By establishing the mass balance equations of heavy metal content and isotope ratios, we use the inverse method to obtain the contribution that natural weathering of carbonate rocks, basalts and black rock series as well as the mining of sulfide deposits have on heavy metal content in riverbed sediments in the Pearl River Basin. Even though carbonate rocks constitute more than 60% of the exposed area in the upper reaches of the Pearl River Basin, this lithology only contributes 9% of the heavy metal content in sediments due to the relatively low content of heavy metals found in this rock type. Basalt weathering on average contributes 64% of the Cr content and 42% of the Ni content found in the sediments, while 53% of the Cd content is derived from the weathering of the black rock series. The negative impact mining has on this environment cannot be ignored as it is the most important source of As (71%) and Pb (60%) in all samples. This is especially the case in the Diaojiang River Basin, where sulfide mining activities still contribute more than 90% of the content of Zn, Pb, Cd and As within the sediments even though many mining sites have been closed since 2000.
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Affiliation(s)
- Weihua Wu
- Key Laboratory of Surficial Geochemistry, Ministry of Education, School of Earth Sciences and Engineering, Nanjing University, Nanjing, 210023, China.
| | - Shuyi Qu
- Key Laboratory of Surficial Geochemistry, Ministry of Education, School of Earth Sciences and Engineering, Nanjing University, Nanjing, 210023, China
| | - Werner Nel
- Department of Geography and Environmental Science, University of Fort Hare, Alice, 5700, South Africa
| | - Junfeng Ji
- Key Laboratory of Surficial Geochemistry, Ministry of Education, School of Earth Sciences and Engineering, Nanjing University, Nanjing, 210023, China
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10
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Ma L, Wang WX, Evans RD. Distinguishing multiple Zn sources in oysters in a complex estuarine system using Zn isotope ratio signatures. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 289:117941. [PMID: 34426188 DOI: 10.1016/j.envpol.2021.117941] [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: 05/12/2021] [Revised: 07/24/2021] [Accepted: 08/06/2021] [Indexed: 06/13/2023]
Abstract
The Pearl River Estuary (PRE), the largest estuary in Southern China, historically has suffered from metal contamination as a result of inputs from different riverine discharges. Determining the sources of metals accumulation in local aquatic flora and fauna remains a great challenge for this estuarine system with complex water circulation. In this study, Zn isotope ratios were measured in local oysters (Crassostrea hongkongensis) collected at 8 locations in the estuary on four occasions from 2014 to 2018, to better understand and assess the contamination sources. The results showed no significant differences (p < 0.05) in δ66Zn values in oysters among the four sampling dates within individual sites. However, approximately a 0.67‰ (range from -0.66‰ to 0.01‰) difference in average δ66Zn values was consistently found in oysters collected from the east side of the estuary compared to the west side, despite their comparable Zn concentrations. A mixing model was subsequently used to estimate the relative contributions from various sources to the δ66Zn values in these oysters. The mixing model predicts that zinc derived from the dissolved fraction (approximately 80 %) was the dominant uptake pathway for oysters collected at the east shore whereas approximately 50 % of the Zn in oysters collected at the west shore was derived from the particulate fraction. The mixing model also was used to estimate the relative impacts of fresh versus saline water on the measured δ66Zn values. Contributions from these two sources also varied between the east and west shores. This study presents the first data for Zn isotope ratios in oysters from the PRE, providing new insight for using Zn isotope ratios in oysters as a powerful tracer of sources in a complex estuarine system.
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Affiliation(s)
- Lan Ma
- Environmental and Life Sciences Graduate Program, Trent University, 1600 West Bank Drive, Peterborough, ON, K9L 0G2, Canada; School of Energy and Environment and Hong Kong Branch of the Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), and State Key Laboratory of Marine Pollution, City University of Hong Kong, Kowloon, Hong Kong, China
| | - Wen-Xiong Wang
- School of Energy and Environment and Hong Kong Branch of the Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), and State Key Laboratory of Marine Pollution, City University of Hong Kong, Kowloon, Hong Kong, China.
| | - R Douglas Evans
- Water Quality Centre, Trent University, 1600 West Bank Drive, Peterborough, ON, K9L 0G2, Canada
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Ma L, Wang WX. Zinc source differentiation in hydrothermal vent mollusks: Insight from Zn isotope ratios. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 773:145653. [PMID: 33582336 DOI: 10.1016/j.scitotenv.2021.145653] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2020] [Revised: 01/08/2021] [Accepted: 02/01/2021] [Indexed: 06/12/2023]
Abstract
Hydrothermal vent represents an extreme environment where metal-enriched fluids are in contact with chemosymbiotic animals. In the present study, Zn isotopic compositions were determined in multiple tissues of three dominant hydrothermal vent mollusks (the mussel Bathymodiolus marisindicus and two gastropods Chrysomallon squamiferum and Gigantopelta aegis) collected from a hydrothermal vent field (Southwest Indian Ridge in the Indian Ocean). We found approximately 1.78‰ differences in the δ66Zn values among the three vent mollusks despite of their similar range of Zn concentrations. The significant variation in the δ66Zn values was considered to be indicative of different Zn uptake sources among the three species as a result of their morphological adaptations. Zinc uptake associated with symbiotic activities may be more relevant in the vent gastropods, whereas Zn uptake from hydrothermal fluids during filter-feeding may also play a role in the vent mussels. However, no significant difference in δ66Zn values was observed among tissues of any of the mollusks, showing the absence of Zn isotope fractionation during internal Zn transport. Our results demonstrated that variable Zn uptake pathways existed among different hydrothermal vent mollusks and could be differentiated by determining the Zn isotopic compositions in their tissues. We also highlight that Zn isotope ratios can be used to track Zn sources to the vent mollusks.
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Affiliation(s)
- Lan Ma
- School of Energy and Environment, Hong Kong Branch of the Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), State Key Laboratory of Marine Pollution, City University of Hong Kong, Kowloon, Hong Kong, China; Research Centre for the Oceans and Human Health, City University of Hong Kong Shenzhen Research Institute, Shenzhen 518057, China
| | - Wen-Xiong Wang
- School of Energy and Environment, Hong Kong Branch of the Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), State Key Laboratory of Marine Pollution, City University of Hong Kong, Kowloon, Hong Kong, China; Research Centre for the Oceans and Human Health, City University of Hong Kong Shenzhen Research Institute, Shenzhen 518057, China; Southern Marine Science and Engineering Guangdong Laboratory, Guangzhou, 511458, China.
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12
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Andronikov AV, Novak M, Oulehle F, Chrastny V, Sebek O, Andronikova IE, Stepanova M, Sipkova A, Hruska J, Myska O, Chuman T, Veselovsky F, Curik J, Prechova E, Komarek A. Catchment Runoff in Industrial Areas Exports Legacy Pollutant Zinc from the Topsoil Rather than Geogenic Zn. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:8035-8044. [PMID: 34042419 DOI: 10.1021/acs.est.1c01167] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
In highly industrialized, densely populated parts of Central Europe, mobilization of legacy Zn pollution from forest ecosystems may negatively affect the quality of water resources. To test this hypothesis, we determined the 66Zn/64Zn isotope ratios of 15 Zn reservoirs and fluxes in an acidified, spruce die-back affected mountain-slope catchment in northern Czech Republic. The δ66Zn values of precipitation, organic horizon, and runoff were statistically indistinguishable. In contrast, δ66Zn values of bedrock orthogneiss and mineral soil were significantly different from δ66Zn values of runoff. The magnitude of within-site Zn isotope fractionations appeared to be relatively small. Despite the large potential source of Zn in bedrock, runoff exported mostly young pollutant Zn that had been temporarily stored in the organic horizon. This conclusion was corroborated by comparing Zn input-output mass balances in the polluted northern catchment and in a relatively unpolluted catchment situated 250 km to the south. Seven-times higher Zn export via runoff at the northern site was controlled by a combination of 10-times higher atmospheric Zn input and five-times higher DOC leaching, compared to the southern site. In industrial areas, atmospherically deposited Zn is leached from headwater catchments in a direct analogy to leaching of highly toxic pollutant Pb.
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Affiliation(s)
| | - Martin Novak
- Czech Geological Survey, Geologicka 6, 152 00 Prague 5, Czech Republic
| | - Filip Oulehle
- Czech Geological Survey, Geologicka 6, 152 00 Prague 5, Czech Republic
| | - Vladislav Chrastny
- Czech Geological Survey, Geologicka 6, 152 00 Prague 5, Czech Republic
- Faculty of Environmental Sciences, Czech University of Life Sciences, Kamycka 129, 165 21 Prague 6, Czech Republic
| | - Ondrej Sebek
- Czech Geological Survey, Geologicka 6, 152 00 Prague 5, Czech Republic
| | | | - Marketa Stepanova
- Czech Geological Survey, Geologicka 6, 152 00 Prague 5, Czech Republic
| | - Adela Sipkova
- Czech Geological Survey, Geologicka 6, 152 00 Prague 5, Czech Republic
- Faculty of Environmental Sciences, Czech University of Life Sciences, Kamycka 129, 165 21 Prague 6, Czech Republic
| | - Jakub Hruska
- Czech Geological Survey, Geologicka 6, 152 00 Prague 5, Czech Republic
| | - Oldrich Myska
- Czech Geological Survey, Geologicka 6, 152 00 Prague 5, Czech Republic
| | - Tomas Chuman
- Czech Geological Survey, Geologicka 6, 152 00 Prague 5, Czech Republic
| | | | - Jan Curik
- Czech Geological Survey, Geologicka 6, 152 00 Prague 5, Czech Republic
| | - Eva Prechova
- Czech Geological Survey, Geologicka 6, 152 00 Prague 5, Czech Republic
| | - Arnost Komarek
- Faculty of Mathematics and Physics, Charles University, Sokolovska 49, 186 75 Prague 8, Czech Republic
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Sun A, Wang WX. Adenine deficient yeast: A fluorescent biosensor for the detection of Labile Zn(II) in aqueous solution. Biosens Bioelectron 2021; 179:113075. [DOI: 10.1016/j.bios.2021.113075] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2021] [Revised: 02/01/2021] [Accepted: 02/02/2021] [Indexed: 11/28/2022]
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