环境工程学报2011，Vol.5Issue(6)：1370-1374,5.
大宝山尾矿重金属形态及其潜在迁移能力分析
Analysis of chemical forms and potential mobility ability of heavy metals in tailings from Dabaoshan mine
摘要
Abstract
The tailing samples investigated in this study were collected from Caoduikeng tailing reservoir,fresh tailing outlet port and Tielong tailing reservoir in Dabaoshan mine area. The chemical speciation characteristics of Cu, Ph, Zn and Mn contained in tailing samples were determined by 7-steps sequential extraction method improved by Dold B, and then the potential migration abilities of these heavy metals were evaluated. The resuits showed that primary sulfides and residual state were the main form of Cu and Pb for all the tailing samples.The dominating chemical forms of Zn in Cao duikeng tailings and fresh tailings were primary sulfides and residual state, and for Tielong tailings, Zn species of water-soluble fraction, exchangeable fraction, Fe(IlI) oxyhydroxides leach, Fe(III) oxides leach, organics fraction increased and their total proportion exceeded 40％. The residual state was the dominant form of Mn in Caoduikeng tailings, while for fresh tailings Mn species were found in the state of oxyhydroxides leach, the primary sulfides and the residues. And additionally water-soluble fraction of Mn species played the dominant roles in Tielong tailings. The mobility of these heavy metals in Caoduikeng tailings and Tielong tailings follows the order of Mn ＞ Zn ＞ Cu ＞ Pb, and in the fresh tailings the orders of their mobility was Mn ＞ Cu ＞ Zn ＞ Ph. The mobility of heavy metals for different areas follows the order: Tielong tailings ＞ fresh tailings ＞ Caoduikeng tailings.关键词
大宝山/重金属/分级提取/形态分布/潜在迁移能力Key words
Dabaoshan mine/ heavy metals/ sequential chemical extraction/ speciation distribution/ potential migration ability分类
资源环境引用本文复制引用
邢宁,吴平霄,李媛媛,党志..大宝山尾矿重金属形态及其潜在迁移能力分析[J].环境工程学报,2011,5(6):1370-1374,5.基金项目
国家自然科学基金重点项目(40730741) （40730741）
