干旱区生态环境知识资源中心(Arid): 白云鄂博稀土伴生矿区土壤重金属污染及其环境评价

Arid

	白云鄂博稀土伴生矿区土壤重金属污染及其环境评价
其他题名	Heavy metal pollution and environmental assessment in the soil of the rare earth associated mining area in Bayan Obo
	谢金亮; 张建锋; 刘永兵; 姜久宁
来源期刊	中国水土保持科学
ISSN	2096-2673
出版年	2020
卷号	18 期号:2
中文摘要	以白云鄂博稀土伴生矿区土壤为研究对象,通过采集主矿、东矿、排土场、尾矿库、矿区工业场地和运输道路6个不同类型内11个0 ~ 20 cm表层土壤,分析了土壤中Pb、Cu、Zn、Cr、Ni和As共6种重金属质量分数,以GB 156182018《土壤环境质量农用地土壤污染风险管控标准(试行) 》和土壤背景值为评价标准,运用单因子法、内梅罗综合污染指数法和污染负荷指数法对该矿区土壤进行土壤环境质量评价。结果表明:矿区长期人为活动使得研究区土壤存在一定的重金属污染,Pb、Cu、Zn、Ni和As为主要的污染元素,其平均质量分数分别为942.42、237.10、1 585.43、321.84和27.62 mg/kg。主矿和尾矿库Pb和Zn污染最重,排土场主要为Zn和Cu污染,此外,尾矿库和排土场Ni污染也较重。3种评价方法结果基本相似,以该地区土壤背景值为参照标准的污染负荷指数法显示,研究区土壤均不同程度受到污染,污染负荷指数PLI平均值为2.58,属于重度污染。
英文摘要	[Background] In view of the problems of over standard heavy metal content,serious environmental pollution and ecological damage in metal mining areas,the environmental assessment research on heavy metal contaminated soil was carried out.Bayan Obo mining area was dry and rainless,and the ecological environment was very fragile,coupled with the serious problem of desertification,thus environmental protection is needed.[Methods] Taking the soil of Baiyun Obo rare earth associated mining area as the research object,the soil contents of heavy metals,Pb,Cu,Zn,Cr,Ni and As,were analyzed by collecting 11 samples of 0-20 cm topsoil in different types of mining areas,i.e.main mine,east mine,dump,tailings pond,industrial site and transportation road.GB 15618-2018 The Soil Environmental Quality Risk Control Standard for Soil Contamination of Agricultural Land (Trial Implementation) and soil background values were used as evaluation criteria.The single factor method,Nemerow comprehensive pollution index method and pollution load index method were used to evaluate the contents of these six kinds of heavy metals.Soil environmental quality was evaluated in mining area.Using IDW interpolation analysis of ArcGIS 10.2 software,the spatial distribution characteristics of comprehensive pollution index value and pollution load index value were drawn,and heavy metal pollution evaluation was carried out.[Results]1) The average values of Pb,Cu,Zn,Ni and As in the soil of the mining area exceeded 5.54,2.37,5.28,1.69 and 1.10 times of the standard respectively,and the average values of Cr did not exceed the standard.The long-term human activitiy in the mining area was the major reason causing heavy metal pollution in the studied area soil.Pb,Cu,Zn,Ni and As were the main pollution elements,and their average contents were 942.42,237.10,1 585.43,321.84 and 27.62 mg/kg,respectively.2) From the perspective of sampling type,the contents of Pb and Zn in the studied soil were relatively high,and the pollution was the most serious.The order of Pb content was:East Mine >tailings pond >main mine >industrial site >dump >transportation road,and the order of Zn content was:Main Mine >tailings pond >dump >east Mine >industrial site >transportation road.Pb and Zn pollution was the most serious in the main mine and tailings pond,while Zn and Cu pollution was the main pollution in the dump.In addition,Ni pollution in the tailings pond and the dump was also serious.3) The results by the 3 evaluation methods were basically similar.The pollution load index method based on the background value of the soil in the study area showed that the soil was polluted to varying degrees,the average PLI of the pollution load index was 2.58,which belonged to severe pollution.[Conculsions]Pb,Cu,Zn,Ni and As were the main pollution elements in the soil of the mining area.Pb,Zn and Cu in all sampling points exceeded the standard seriously,with the average exceeding rate of 90.91%,100% and 100% respectively.Three evaluation methods showed that the main pollution in the mining area was Pb and Zn,followed by Cu and Ni pollution,no Cr pollution.
中文关键词	土壤重金属 ; 污染特征 ; 土壤环境质量评价 ; 伴生矿区
英文关键词	heavy metals in soil pollution characteristics soil environmental quality assessment associated mining areas
类型	Article
语种	中文
收录类别	CSCD
WOS类目	Environmental Sciences & Ecology
CSCD记录号	CSCD:6734059
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/354110
作者单位	谢金亮, 中国恩菲工程技术有限公司, 北京 100038, 中国. 姜久宁, 中国恩菲工程技术有限公司, 北京 100038, 中国. 张建锋, 中国恩菲工程技术有限公司;;北京林业大学水土保持学院, ;;, ;;, 北京;;北京 100038;;100083, 中国. 刘永兵, 中国地质科学院国家地质实验测试中心, 北京 100037, 中国.
推荐引用方式 GB/T 7714	谢金亮,张建锋,刘永兵,等. 白云鄂博稀土伴生矿区土壤重金属污染及其环境评价[J],2020,18(2).
APA	谢金亮,张建锋,刘永兵,&姜久宁.(2020).白云鄂博稀土伴生矿区土壤重金属污染及其环境评价.中国水土保持科学,18(2).
MLA	谢金亮,et al."白云鄂博稀土伴生矿区土壤重金属污染及其环境评价".中国水土保持科学 18.2(2020).