摘要
本文选择甘肃、新疆两地三处的历史遗留黄金堆浸尾渣场地,研究三场地黄金堆浸尾渣及周边土壤、地下水的污染状况。研究共采集195个黄金堆浸尾渣样品,469份土壤样品(含12份对照点样品),42份地下水样品(含3份对照点样品)。结果显示,历史遗留黄金堆浸尾渣样品通过酸浸或水浸检出总氰化物(以CN^(-)计)、Cu、As、Cd、Zn、Pb、Ni因子,黄金堆浸尾渣周边土壤部分点位存在砷元素超标,周边地下水部分点位存在砷元素超标。堆浸尾渣周边土壤及地下水中砷元素含量明显偏高,与氰化堆浸提金生产过程金矿伴生砷含量高有关,随着时间的推移,经过雨水冲刷及渗滤液的作用,尾渣底部及附近的土壤、地下水遭受砷元素污染。
In this study,three sites of historical gold heap leaching tailings in Gansu and Xinjiang were taken as the research object,and the pollution status of gold heap leaching tailings and surrounding soil and groundwater in the three sites was studied.A total of 195 gold heap leaching tailings samples and 469 soil samples(including 12 control point samples)and 45 groundwater samples(including 3 control point samples)were collected.The results showed that total cyanide(in terms of CN^(-)),Cu,As,Cd,Zn,Pb and Ni factors were detected by acid leaching or water leaching in the samples of historical gold heap leaching tailings.The arsenic elements of some monitoring points in the soil around the gold heap leaching tailings exceeded the standard.The arsenic content in the soil and groundwater around the heap leaching tailings is obviously higher,which is related to the high arsenic content in the gold mine associated with cyanide heap leaching gold extraction.With the passage of time,after rain water scour and leachate,the soil and groundwater at the bottom of the tail slag and nearby suffer arsenic pollution.
出处
《绿色矿冶》
2023年第3期68-72,共5页
Sustainable Mining and Metallurgy
基金
金矿堆浸场地微生物淋洗-植物固定耦合治理技术研发(2018YFC1801805)
国家重点研发计划项目(金矿堆浸场地微生物淋洗-植物固定耦合治理技术研发)(2018YFC1801805)。
关键词
黄金堆浸尾渣
氰化尾渣
重金属
土壤
地下水
污染
gold heap leaching tailings
cyanide reside
heavy metal
soil
groundwater
pollution
