煤矸石中微量重金属元素化学活性的实验模拟研究  

Experimental Simulation of Chemical Activity of Heavy Metals in Coal Gangue

作　　者：党志[1] 刘丛强[2] 李忠[1] 

机构地区：[1]华南理工大学化工学院,广东广州510640 [2]中国科学院地球化学研究所环境地球化学国家重点实验室,贵阳550002

出　　处：《华南理工大学学报（自然科学版）》2001年第12期1-5,共5页Journal of South China University of Technology(Natural Science Edition)

基　　金：国家自然科学基金 (4 98730 33)与国家攀登项目'95-预- 39'5 - 4专题联合资助项目

摘　　要：如何准确评估矿山尾矿中重金属元素对周围地区生态系统的影响是个重要的问题 .通过实验模拟方法发现重金属硫化物矿物的氧化是煤矸石向环境释放重金属的主要途径 .但是 ,在离开煤矸石进入到周围环境的过程中 ,重金属元素有可能被煤矸石中大量有机质所络合和风化过程中生成的铁的胶体所吸附 .因此 ,它们的环境化学行为在很大程度上受煤矸石本身组成和性质的制约 .This paper treats of how to precisely evaluate the environmental and ecological effects of heavy metals existing in the gangues. Experimental simulation was employed as an approach to the study of the chemical behavior of heavy metals in the weuthering process of the coal mine spoil. The results show that the oxidation of metal sulfides containing heave metals gives rise to the release of heavy metals into the surrounding environment. When heavy metals are released into the ecological system, the bulk of them will be absorbed by organic matter and Fe_Mn oxide colloid is formed in the process of weathering. The mobility of heavy metals in the coal mine spoil can be dominantly controlled by changing the composition of the coal mine spoil.

关 键 词：煤矸石-水相互作用 重金属元素 化学活性 环境效应 环境地球化学 重金属污染源 实验模拟 

分 类 号：X142[环境科学与工程—环境科学]