摘要
以新疆准噶尔盆地东部(准东)煤田的五彩湾矿区露天煤矿为研究对象,对矿区8个采样点降尘、土壤及植物的重金属含量进行比较分析与评价。结果表明:不同采样点的降尘样品中五种重金属含量为:Cr>Pb>As>Hg>Cd;土壤中五种重金属含量均小于现行国家标准中建设用地土壤风险筛选值中第二类用地筛选值。对降尘和土壤生态风险评价结果显示:降尘中Hg为中等强度风险,其它四种为轻微风险;8个采样点中,只有位于筛分场的8号点为中等强度生态风险,其余七个点均为轻微生态风险;土壤中五种重金属以及8个采样点均为轻微生态风险。矿区周围野生植物稀少,所调查植物中重金属Pb、As、Hg和Cd含量均在正常植物含量范围,而所有被调查植物中Cr含量均超出正常含量标准。
The opencast coal mines in Eastern Junggar Basin in XinJiang were selected as the research region.Heavy metals contents of 8 sampling sites in dustfall,soil and plant were analyzed and evaluated.The results showed that the average content in dustfall was in the order Cr>Pb>As>Hg>Cd.The contents of five heavy metals in the soil were all lower than the screening values of type II land in the screening values of soil risk of construction land in the the present naitional control standard.According to the results of ecological assessment,Hg in dustfall presented moderate-intensity ecological risk,while the other four kinds of heavy metals presenting minor ecological risk.Among eight sampling sites,only the 8th site showed moderate risk,with the remaining seven sites showing slight-intensity risk.Meanwhile,five kinds of heavy metal in soil from 8 sampling sites all showed tiny ecological risk.Wild plants around the mining area are rare.The contents of heavy metals Pb,As,Hg and Cd in the investigated plants were all within the normal plant content range,but the contents of Cr in all the investigated plants were above the normal content standard.
作者
胡潇涵
张琳
孔利锋
王天娇
Hu Xiaohan;Zhang Lin;Kong Lifeng;Wang tianjiao(Xinjiang Academy of Environmental Protection Science, Urumqi, Xinjiang 830011,China;Xinjiang Key Laboratory for Environmental Pollution Monitoring and Risk Warning, Urumqi, Xinjiang 830011,China;Xinjiang Engineering Technology Research Center for Cleaner Production, Urumqi, Xinjiang 830011,China)
出处
《新疆环境保护》
2020年第4期24-32,共9页
Environmental Protection of Xinjiang
关键词
露天煤矿
重金属
污染风险
生态风险
opencast coal mine
heavy metal
pollution risk
ecological risk
