| 湖南锡矿山锑矿区水环境中DOM三维荧光特征及其对锑污染的指示意义 |
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| 引用本文： | 李琬钰,周建伟,贾晓岑,唐沛东.湖南锡矿山锑矿区水环境中DOM三维荧光特征及其对锑污染的指示意义[J].地质科技通报,2022,41(4):215-224. |
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| 作者姓名： | 李琬钰 周建伟 贾晓岑 唐沛东 |
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| 作者单位： | 中国地质大学(武汉)环境学院, 武汉 430078 |
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| 基金项目： | 国家自然科学基金项目41572344 |
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| 摘 要： | 溶解性有机质(dissolved organic matter, 简称DOM)是影响锑迁移转化的重要因素之一。湖南锡矿山锑矿是世界最大的锑矿, 水环境中锑污染情况严重。为查明锡矿山矿区水环境中DOM特征及其影响, 对锡矿山水环境样品进行三维荧光分析, 利用平行因子法提取水环境中天然有机组分, 分析荧光特征, 探究各组分之间与锑的相关关系。分析表明, 矿区水体环境中DOM以低腐殖化、陆源与微生物源混合来源为特点, 多数水样以陆源有机物为主。锡矿山锑矿区水体中包括了3种不同的组分: C1组分为陆源类腐殖质, C2组分为醌类腐殖质, C3组分为类蛋白质(酪氨酸); 水环境中C1组分相对含量最高, 地表水中C3组分相对含量高于地下水。研究认为, 存在以下途径影响地下水环境中锑的释放: ①类蛋白质组分与锑的络合促进锑的溶解释放; ②腐殖质组分与锑的直接络合。低锑地表水中天然有机组分相对含量受稀释作用的影响, 高锑地表水中天然有机组分相对含量对锑的来源有一定的指示作用。
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| 关 键 词： | 锡矿山锑矿区 锑 溶解性有机质 三维荧光光谱 |
| 收稿时间： | 2021-01-08 |
EEMs characteristics of dissolved organic matter in water environment and its implications for antimony contamination in antimony mine of Xikuangshan,Hunan Province |
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| Affiliation: | School of Environmental Studies, China University of Geosciences(Wuhan), Wuhan 430078, China |
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| Abstract: | Dissolved organic matter (DOM) is an important factor affecting the migration and transformation of antimony(Sb). The Hunan Xikuangshan Sb mine is the largest Sb mine in the world and antimony pollution in the aquatic environment is serious. To determine the characteristics of DOM in the water environment of the Xikuangshan mining area and its influences, three-dimensional fluorescence analysis was performed on the water environment samples of the Xikuangshan mining area. PARAFAC was used to extract the natural organic components in the water environment and the relationship between each component and Sb was explored. The analysis shows that the DOM in the water environment of the mining area is characterized by low humification and mixed sources of terrestrial and microbial sources, and most water samples are mainly terrestrial organic matter. There are three different components in the water body of the Sb mining area of Xikuangshan: the C1 component is terrestrial humus; the C2 component is quinone humus; the C3 component is protein-like (tyrosine). The relative content of the C1 component in the water environment is the highest and the relative content of the C3 component in surface water is higher than that in groundwater. Studies have shown that there are the following ways to affect the release of Sb in the groundwater environment: (1) the complexation of protein-like components with Sb promotes the dissolution and release of Sb; (2) the direct complexation of humus components with Sb. The relative content of natural organic components in surface water with low Sb is affected by dilution. The relative content of natural organic components in surface water with high Sb has a certain indication for the source of Sb. |
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