某铅锌矿区矿渣重金属Pb和Zn浸出影响分析
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摘要
以三峡库区某废弃铅锌矿区矿渣为研究对象,采用优化的连续化学提取(SCE)-微波消解-ICP-MS法分析了矿渣中Pb和Zn的水溶态、弱酸态、还原态、氧化态及残渣态的分布特性,研究了不同pH值与反应时间对重金属Pb和Zn浸出的影响,分析了Pb和Zn的迁移能力和浸出能力。研究表明,Pb主要以氧化态和弱酸态形式存在,Zn以还原态和弱酸态为主,有效态含量PbZn,最大浸出量Pb>Zn,碱性环境对Zn的稳定有利。当环境条件发生改变时,如pH值或降水改变时,均可能造成矿区中包括Pb和Zn在内的重金属浸出和迁移,造成严重的二次污染。
The waste residue from an abandoned lead zinc mining area in the Three Gorges Reservoir area as the research object.Optimized species chemical extraction(SCE)-microwave digestion-ICP-MS method was adopted.Effects of different pH value and reaction time on leaching of heavy metals Pb and Zn were studied.Mobility and leaching ability of Pb and Zn were analyzed.The results showed that Pb mainly exists in the form of oxidation and weak acids.Zn was mainly composed of reduced and weak acids.Effective content was PbZn,and the maximum leaching amount is Pb>Zn.Alkaline environment is beneficial to the stability of Zn.If environmental conditions change(such as pH value or precipitation),the possibility of leaching and migration of heavy metals including Pb and Zn in the mining area will increase,and even cause serious secondary pollution.
The waste residue from an abandoned lead zinc mining area in the Three Gorges Reservoir area as the research object.Optimized species chemical extraction(SCE)-microwave digestion-ICP-MS method was adopted.Effects of different pH value and reaction time on leaching of heavy metals Pb and Zn were studied.Mobility and leaching ability of Pb and Zn were analyzed.The results showed that Pb mainly exists in the form of oxidation and weak acids.Zn was mainly composed of reduced and weak acids.Effective content was Pb
引文
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[2] SCHOLZ F, MCMANUS J, SOMMER S.The manganese and iron shuttle in a modern euxinic basin and implications for molybdenum cycling at euxinic ocean margins[J].Chemical Geology,2013,355(5):56-68.
[3]高俊刚,吴雪,张镱锂,等.基于等级层次分析法的金沙江下游地区生态功能分区[J].生态学报,2016,36(1):134-137.GAO Jungang,WU Xue,ZHANG Yili,et al.Ecological function regionalization in the lower Jinsha River Basin using analytic hierarchy process method[J].Acta Ecologica Sinica,2016,36(1):134-137.
[4]韦丽丽,周琼,谢从新,等.三峡库区重金属的生物富集、生物放大及其生物因子的影响[J].环境科学,2016,37(1):325-334.WEI Lili, ZHOU Qiong, XIE Congxin, et al.Bioaccumulation and biomagnification of heavy metals in Three Gorges Reservoir and effect of biological factors[J].Environmental Science,2016,37(1):325-334.
[5]ZIV OHAR,AVI OSTFELD,ORI LAHAV,et al.Modelling heavy metal contamination events in water distribution systems[J].Procedia Engineering,2014,149:12-22.
[6]邹文佳,张淇翔,石林,等.江西某铜矿排土场与尾矿库重金属释放规律及其对地下水的污染风险[J].有色金属工程,2016,6(1):90-94.ZHOU Wenjia,ZHANG Qixiang,SHI Lin,et al.Release rules and groundwater contamination risk of heavy metals from dump and tailings pond of a copper mine in Jiangxi[J].Nonferrous Metals Engineering,2016,6(1):90-94.
[7]王健康,周怀东,陆瑾,等.三峡库区水环境中重金属污染研究进展[J].中国水利水电科学研究院学报,2014,12(1):49-53.WANG Jiankang,ZHOU Huaidong,LU Jin,et al.Reviews of heavy metals pollution in water environment of Three Gorges Reservoir[J].Journal of China Institute of Water Resources and Hydropower Research,2014,12(1):49-53.
[8]尹炳奎,黄满红,李光明,等.云南某冶炼厂周围农田土壤重金属污染状况及生态风险评价[J].有色金属工程,2017,7(1):92-96.YIN Bingkui,HUANG Manhong,LI Guangming,et al.Heavy metals pollution and potential ecological risk in paddy soils around historical mining plant in yunnan province[J].Nonferrous Metals Engineering,2017,7(1):92-96.
[9]李鹏,曾光明,蒋敏,等.pH值对霞湾港沉积物重金属Zn、Cu释放的影响[J].环境工程学报,2010,4(11):2425-2428.LI Peng,ZENG Guangming,JIANG Min,et al.Effect of pH on release of heavy metals Zn and Cu in sediment from Xiawan[J].Chinese Journal of Environmental Engineering,2010,4(11):2425-2428.
[10]A PELFRêNE,S DéTRICHé,F DOUAY.Combining spatial distribution with oral bio-accessibility of metals in smelter-impacted soils:implications for human health risk assessment[J].Environmental Geochemistry&Health,2015,37(1):49-62.
[11]张建,魏怀瑞,杨瑞东,等.贵州都匀牛角塘铅锌矿区选矿尾矿中重金属元素分布特征研究[J].有色金属工程,2018,8(1):122-127.ZHANG Jian,WEI Huairui,YANG Ruidong,et al.Study on distribution characteristics of heavy metals in tailings from Niujiaotang lead-zinc mine area,Duyun City, Guizhou Province[J]. Nonferrous Metals Engineering,2018,8(1):122-127.
[12]陆泗进,王业耀,何立环.会泽某铅锌矿周边农田土壤重金属生态风险评价[J].生态环境学报,2014,(11):1832-1838.LU Sijin,WANG Yeyao,HE Lihuan.Heavy metal pollution and ecological risk assessment of the paddy soils around a Pb-Zn mine in Huize Country[J].Ecology and Environmental Sciences,2014,(11):1832-1838.
[13] KEROLLIMUSTAFA. MCharacterizationand environmental impact assessment of jarosite process tailing waste[J].Review of Scientific Instruments,2014,67(8):2894-2898.