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通过重金属含量分析,分级提取化学形态分析,结合矿物成分和化学成分分析,对黄龙铺矿区1号尾矿库重金属元素在风化过程中的地球化学行为进行了研究。研究结果表明在横向上,尾矿库中心排水口处地势低洼,铜、铁因相对活泼易于迁移而流失,铅、锌、铬、镉在尾矿库四周的地表浅部淋失,在尾矿库中心则相对富集。化学形态分析表明尾砂中各重金属元素赋存状态各有不同,一般以T6原生硫化物态和T7残渣态为主,铜、锌、铁迁移性较强;其他则较弱,表明对环境威胁不是很大。重金属的迁移明显的分为氧化带和次氧化带,研究结果显示尾矿覆盖方法也不一定能够有效地阻滞污染元素的迁移。
The geochemical behaviors of heavy metals in the tailing mines of No. 1 Huanglongpu Mine during weathering were studied by analyzing the heavy metal content, grading chemical morphological analysis, combining the mineral composition and chemical composition analysis. The results show that in the horizontal direction, the drainage at the center of the tailings reservoir is low-lying, copper and iron are lost due to relatively lively migration and easy migration, lead, zinc, chromium and cadmium are leached in the shallow surface around the tailings, Library center is relatively rich. Chemical morphological analysis showed that the occurrence of various heavy metal elements in the tailings are different, generally T6 primary sulfide state and T7 residue state, copper, zinc, iron strong mobility; others are weaker, indicating that the threat to the environment not very big. The migration of heavy metals is obviously divided into oxidation zone and secondary oxidation zone. The results show that tailings covering method may not be able to effectively block the migration of pollutants.