摘要
采用改进欧共体参比司法(BCR)提取广西大厂锡-多金属矿区巴里尾矿库的碳酸盐型尾矿的Cd。研究表明,氧化作用使原尾矿中磁黄铁矿、方铅矿、方解石被大量消耗,在产生酸水的同时释放出大量重金属;该尾矿的表层形成厚层的次生石膏和纤铁矿胶结的硬层,可富集释放出来的Cd;在氧化层中Cd主要以酸提取态形式赋存,其潜在迁移性最强,很容易进入环境,带来严重的镉污染。
In this paper,the heavy metal Cd,which collected form Bali CRSTS( carbonate rich type of tailings) in Dachang cassiterite-polymentallic sulfide mine( Guangxi,China),was extracted with the improved BCR( European Community Bureau of Reference) method. The research shows that: oxidation makes the original tailings a large number of magnetic pyrite,galena,calcite consumptioned. As the result,acid released and it can releases a large number of heavy metal; The hard layer of the tailings surface can form a thick layer of secondary gypsum and lepidocrocite cementation,which can concentrate the cadmium element; Cadmium mainly occurrence with acid extractable form in hard oxide layer,The potential migration is the best,It can releases in to the environment easily,and bring the cadmium pollution.
出处
《矿物岩石地球化学通报》
CAS
CSCD
北大核心
2015年第5期1050-1057,共8页
Bulletin of Mineralogy, Petrology and Geochemistry
基金
国家自然科学基金项目(41272394
40972220)