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黔西北炼锌地区河流重金属污染特征
Characteristics of Heavy Metal Pollution in Stream of Zinc Smelting Area, Northwest of Guizhou
查看参考文献7篇
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文摘
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黔西北地区铅锌矿的开发导致了后河严重的重金属污染。为此对河流水体、悬浮物和沉积物中重金属及其沿河流的分布规律进行了研究。结果表明，土法炼锌及其下游铅锌选矿都对河流造成污染，特别是选矿厂的尾矿直接注入河道，使河流沉积物中滞留有较多硫化物矿物。河流重金属的搬运迁移以悬浮质或泥沙推移等机械搬运为主。河流水体环境化学性质对沉积物中硫化物的氧化作用及其重金属向水体的释放起到一定抑制作用，但流水的淘洗和支流的混入过程等水文地球化学条件改变时可使氧化矿物表面的重金属释放返回水相，成为溶解态重金属。沉积物是河流重金属潜在的二次污染源。 |
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其他语种文摘
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It has been found that a stream was severely contaminated with wastes from a long-term zinc smelting factory in the Northwest of Guizhou. The geochemical characteristics of water, suspension solid matter and sediments of stream were studied. The results showed that some sulfide retained in the sediments due to the fact that mine tailings were directly poured into the stream. The physical transportation, such as suspension matter and ooze, was the main mode of heavy metal transportation. To a certain extent, the oxidation of sulfide and releasing of heavy metals were controlled by the chemical characteristics of hydrological environment. However, heavy metals might be released into water environment by the elutriation of stream and dilution of branch stream. Therefore, it can be concluded that the sediments are the potential source of heavy metal pollution. |
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来源
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农业环境保护
,2002,21(5):443-446 【核心库】
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关键词
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重金属污染
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河流
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炼锌
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黔西北
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地址
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中科院贵阳地球化学所, 环境地球化学国家重点实验室, 贵州, 贵阳, 550002
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1000-0267 |
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学科
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环境污染及其防治 |
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基金
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中国科学院知识创新工程项目
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文献收藏号
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CSCD:1038753
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