摘要
通过对某废弃铜矿区土壤中6种重金属全量和形态分析,结果表明废弃地表层土壤已经受到Cu、As污染,废石堆放地和尾矿库周围土壤污染更为严重;6种重金属生物有效态占比由高到低的顺序为Cu>As>Cd>Pb>Cr>Zn,Cu、As元素的生物活性强。对废石和尾矿进行浸出毒性试验,废石浸出液Cu超过最高允许排放浓度,尾矿浸出液Cu和As超过最高允许排放浓度,废石和尾矿属于第Ⅱ类一般工业固体废物,为区内主要污染源。根据矿区污染调查及污染现状问题,建议采用植物修复技术对废弃地进行修复。
Through the analysis of the total amount and form of six kinds of heavy metals in the soil of an abandoned copper mine area, the results show that the soil in the abandoned surface layer has been polluted by Cu and As,the soil around the waste rock dump and tailings pond has been polluted more seriously;The sequence of bioavailability of six heavy metals from high to low is Cu>As>Cd>Pb>Cr>Zn, and the bioactivity of Cu and As is strong;the leaching toxicity test of waste rock and tailings has been carried out, and the Cu and As in the waste rock leach solution exceed the maximum allowable discharge concentration, and the Cu and As in the tailings leach solution exceed the maximum allowable discharge concentration.waste rock and tailings belong to Category Ⅱ general industrial solid waste, which are the main pollution sources in the area. According to the pollution investigation and the pollution problems in the mining area,it is suggested to use the plant remediation technology to repair the waste land.
作者
高建国
王旭东
唐平宇
杨灵芝
Gao Jianguo;Wang Xudong;Tang Pingyu;Yang Lingzhi(Hebei Research Center for Geoanalysis9Baoding Hebei 071051,China)
出处
《环境与发展》
2021年第2期83-87,共5页
Environment & Development
关键词
铜矿废弃地
重金属污染
生物有效性
浸出毒性
植物修复
Copper mining wasteland
Heavy metal pollution
Bioavailability
Leachingtoxicity
Phytoremediation
