新疆焉耆盆地农田土壤重金属环境容量分析  

ENVIRONMENTAL CAPACITY OF HEAVY METALS IN FARMLAND SOILS IN YANQI BASIN,XINJIANG

作　　者：安外尔·艾力 麦麦提吐尔逊·艾则孜[1,2] 靳万贵[1] 李新国[1] ELI Anwar;EZIZ Mamattursun;JIN Wan-gui;LI Xin-guo(College of Geographical Science and Tourism,Xinjiang Normal University,Urumqi 830054,China;Xinjiang Laboratory of Lake Resources and Environment in Arid Zone,Xinjiang Normal University,Urumqi 830054,China)

机构地区：[1]新疆师范大学地理科学与旅游学院,乌鲁木齐830054 [2]新疆师范大学新疆干旱区湖泊环境与资源实验室,乌鲁木齐830054

出　　处：《环境工程》2020年第3期168-173,共6页Environmental Engineering

基　　金：国家自然科学基金项目(41561073,41867076)。

摘　　要：为进一步了解土壤环境容量状况,从焉耆盆地采集191个农田土壤样品,测定其中As、Ni、Cr、Cu、Pb、Cd和Zn 7种重金属元素的含量,基于GIS技术,采用综合容量指数法分析农田土壤重金属环境容量特征与空间分布规律。结果表明:1)焉耆盆地农田土壤中As、Cd、Cr、Cu、Ni、Pb与Zn含量平均值均未超出GB 15618—2018《土壤环境质量农用地土壤污染风险管控标准(试行)》中的土壤风险筛选值;2)农田土壤各重金属元素单项环境容量指数平均值由大到小依次为:As、Cr、Ni、Cu、Pb、Cd、Zn。As的环境容量指数处于高容量状态,Ni、Cr、Cu、Pb、Cd、Zn等元素环境容量指数均处于中容量状态;3)研究区7种重金属元素环境容量空间分布情况不同,研究区各容量区土壤面积顺序为:中容量区>高容量区>低容量区>超载区>警戒区。该结果可为研究区农田土壤环境保护和管理提供依据。For the further understanding of soil environmental capacity,a total of 191 farmland soil samples were collected from Yanqi Basin,and the concentrations of seven heavy metals(As,Cd,Cr,Cu,Ni,Pb and Zn)were identified.The characteristics and spatial distribution of heavy metal environmental capacity of farmland soils were analyzed based on GIS technology and the comprehensive capacity index.Results showed that:1)the average concentrations of As,Cd,Cr,Cu,Ni,Pb and Zn in farmland soils in Yanqi Basin was under the limits of the risk values of National Standard of Agricultural Land Contamination(GB 15618—2018);2)the average values of single environmental capacity index of heavy metals in farmland soils were ranked as:As>Cr>Ni>Cu>Pb>Cd>Zn.The environmental capacity of As was classified into the high capacity level,while Ni,Cr,Cu,Pb,Cd,and Zn into the medium capacity level;3)the spatial distribution patterns of environmental capacity of seven heavy metals were different.The proportion of areas with different capacity was ranked as:medium capacity area>high capacity area>low capacity area>super capacity area>warning capacity area.Results of this study will provide scientific basis for protection and management of agricultural soil environmental quality in similar area.

关 键 词：农田 土壤重金属 环境容量 焉耆盆地 

分 类 号：X53[环境科学与工程—环境工程]