Mercury and methylmercury in riparian soil,sediments, mine-waste calcines,and moss from abandoned Hg mines in east Guizhou province,southwestern China |
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| Institution: | 1. State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, PR China;2. Graduate School of the Chinese Academy of Sciences, Beijing 100039, PR China;1. State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Science, Guiyang 550002, China;2. Environmental Chemistry and Technology Program, University of Wisconsin-Madison, Madison, WI 53706, USA;3. Department of Ecosystem Science and Management, University of Wyoming, Laramie, WY 82071, USA;4. State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Science, Guiyang 550002, China;5. Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Science, Beijing 100049, China;1. School of Environment, Nanjing University, State Key Laboratory of Pollution Control and Resource Reuse, Nanjing, Jiangsu Province, People’s Republic of China, People’s Republic of China;2. Environmental and Life Sciences Program (EnLS), Trent University, Peterborough, Ontario, Canada;1. State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, PR China;2. College of Resources Environment, Southwest University, Chongqing 400716, PR China;3. Soil and Earth Sciences, Institute of Agriculture and Environment, Massey University, Palmerston North, New Zealand;1. State Environmental Protection Engineering Center for Mercury Pollution Prevention and Control, Laboratory of Metallomics and Nanometallomics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China;2. College of Resources and Environment, Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, Fujian Agriculture and Forestry University, Fuzhou 350002, Fujian, China;3. Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China;1. College of Resources and Environment, Southwest University, China;2. Chongqing Key Laboratory of Agricultural Resources and Environment, Chongqing, China;3. The National Long- Term Fertilizer Experimental Station in Purple Soil, Southwest University, China;4. Department of Plant and Soil Sciences, Oklahoma State University, Stillwater, OK 74078, USA;1. State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550081, China;2. University of Chinese Academy of Sciences, Beijing, 100049, China;3. Biology Department, University of Ottawa, 30 Marie Curie, Ottawa, ON, K1N 6N5, Canada;4. College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Nankai University, Tianjin, 300350, China;5. Center for Excellence in Quaternary Science and Global Change, Chinese Academy of Sciences, Xi''an, 710061, China |
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| Abstract: | Concentrations of total Hg and methylmercury (MMHg) in riparian soil, mine-waste calcine, sediment, and moss samples collected from abandoned Hg mines in Wanshan district, Guizhou province, China, were measured to show regional dispersion of Hg-contamination. High total Hg and MMHg concentrations obtained in riparian soils from mined areas, ranged from 5.1 to 790 mg kg?1 and 0.13 to 15 ng g?1, respectively. However, total Hg and MMHg concentrations in the soils collected from control sites were significantly lower varying from 0.1 to 1.2 mg kg?1 and 0.10 to 1.6 ng g?1, respectively. Total Hg and MMHg concentrations in sediments varied from 90 to 930 mg kg?1 and 3.0 to 20 ng g?1, respectively. Total Hg concentrations in mine-waste calcines were highly elevated ranging from 5.7 to 4400 mg kg?1, but MMHg concentrations were generally low ranging from 0.17 to 1.1 ng g?1. Similar to the high Hg concentrations in soil and sediments, moss samples collected from rocks ranged from 1.0 to 95 mg kg?1 in total Hg and from 0.21 to 20 ng g?1 in MMHg. Elevated Hg concentrations in mosses suggest that atmospheric deposition might be an important pathway of Hg to the local terrestrial system. Moreover, the spatial distribution patterns of Hg contamination in the local environment suggest derivation from historic Hg mining sites in the Wanshan area. |
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