西南喀斯特地区某典型铅锌选冶渣场影响区土壤重金属污染评价及其空间分布特征  

Evaluation of heavy metal contaminated soil and its spatial distribution characteristics in affected area of slag yard by a typical lead-zinc ore dressing and smelting plant in karst region of southwestern China

作　　者：梁慧黎 樊敏[1] 贾梁[1] 谌书[1] 蒋卉[1] 傅开彬[1] 王哲[1] 姚俊 李森[3] Liang Huili;Fan Min;Jia Liang;Chen Shu;Jiang Hui;Fu Kaibin;Wang Zhe;Yao Jun;Li Sen(The School of the Environment and Resources,Southwest University of Science and Technology,Mianyang Sichuan 621010,China;The College of Water Resources and the Environment,China University of Geosciences,Beijing 100083,China;Sichuan Academy of Natural Resources Sciences,Chengdu Sichuan 610000,China)

机构地区：[1]西南科技大学环境与资源学院,四川绵阳621010 [2]中国地质大学(北京)水资源与环境学院,北京100083 [3]四川省自然资源科学研究院,四川成都610000

出　　处：《化工矿物与加工》2023年第2期43-53,60,共12页Industrial Minerals & Processing

基　　金：国家重点研发计划(2019YFC1803500);四川省科技计划(2021YFQ0067)。

摘　　要：掌握渣场影响区的土壤重金属空间分布特征并对其进行综合评价,可为其土壤污染区划和环境治理提供科学依据。在西南喀斯特地区某典型铅锌选冶渣场影响区农用地和林地采集了15个土壤样品(每个采样点均包含表、中、底层),测定了该土壤样品的重金属含量(Pb、As、Cu、Zn、Ni、Cr)和理化性质,采用多元统计-空间分析-土壤污染综合评价方法分析渣场影响区土壤重金属空间分布特征并进行污染风险评价,结果表明:Pb和As是该渣场影响区土壤的主要重金属污染物;表层土壤重金属污染主要与渣场位置有关,中、底层土壤重金属污染主要受土壤理化性质影响;土壤高污染区主要分布在研究区的中部和南部,低污染区分布在研究区的北部;渣场影响区土壤重金属污染的区划可识别风险区域,实现对渣场影响区土壤重金属污染的分区治理和区域管控。Understanding of the spatial distribution characteristics of heavy metals contaminated soil in the affected area of slag yard and performance of a comprehensive evaluation can provide the scientific basis for contaminated soil zoning and environmental management in the slag yard.Within the karst region of southwestern China,a total of 15 soil samples were collected from farm land and forest land in the affected area of slag field by a typical lead-zinc dressing and smelting plant(at each sampling point the part of soil sample from surface,middle and bottom layers were taken),and the heavy metal(Pb,As,Cu,Zn,Ni,Cr)contents in each sample and their physical and chemical properties were determined.The evaluation method integrated with multivariate statistics-spatial analysis and soil pollution was used for studying the spatial distribution characteristics of soil contaminated with heavy metals in the affected area of the slag field and performance of pollution risk assessment,the results show that:Pb and As are the major heavy metals contaminated in the soil of affected area of slag yard.The heavy metal contamination of the surface soil was mainly subject to the location in the slag yard,while the heavy metal contamination of the middle and bottom soil was mainly subject to the physical and chemical properties of the soil.The highly contaminated soil was mainly found in the central and southern parts of the studying area,and the soil with low contamination was located in the northern part of the studying area.The zoning of soil contaminated with heavy metal in the affected area of slag yard facilitated the risk identification of areas and the handling of soil contaminated with heavy metals zone by zone and the regional management&control in the affected areas of slag yard.

关 键 词：渣场影响区 土壤重金属污染 多元统计 空间分析 污染综合评价 喀斯特地区 

分 类 号：X53[环境科学与工程—环境工程] X820.4