尾砂库重金属元素表生地球化学行为的初探  

A Study of Heavy Metal Geochemistry Behavior During Oxidation in the Mine Tailings

作　　者：端木合顺[1] 康晓静[2] 李万生 

机构地区：[1]西安科技大学地质与环境学院,陕西西安710054 [2]中煤平朔煤业有限责任公司,山西朔州036006 [3]陕西省地质矿产勘查开发局综合地质大队,陕西渭南714000

出　　处：《矿物学报》2011年第1期153-159,共7页Acta Mineralogica Sinica

摘　　要：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 paper studied geochemical behaviour of the heavy metal elements during weathering in tailings site 1 of huanglongpu,by using heavy metal content analysis,the seven-step extraction technique developed by Dold,and analyses of mineral composition and chemical speciation.The distribution regulation of heavy metals in this tailings reservoir is enriched in middle and deficient around in the shallow surface around the tailings,but the content of Cu and Fe in middle is lower than that around for relatively easy to transfer and erosion.Chemical fractions analysis showed that the chemical forms of heavy metals are different,generally,the domainant status were in T6 sulfide fraction and T7 residual fraction.In order to reduce tailings pollution and repair the mine environment,people put forward different kinds of tailings coverage schemes.This paper studies indicate that the schemes can not effectively block migration of the heavy metal element.

关 键 词：尾矿 重金属 垂向分布 分级提取形态 

分 类 号：X132[环境科学与工程—环境科学] X142