• 研究报告 •

### 焉耆盆地表层土壤重金属的分布、来源及区域差异

1. (1新疆干旱区湖泊环境与资源重点实验室， 新疆师范大学， 乌鲁木齐830054； 2新疆大学资源与环境科学学院， 乌鲁木齐 830046)
• 出版日期:2014-10-10 发布日期:2014-10-10

### Spatial distribution, source and regional difference of soil heavy metals in Yanqi basin, China.

YIMIT Hamit1**, MAMT Zulpiya2, TAYIR Xiakure2

1. (1 Xinjiang Laboratory of Lake Environment and Resources in Arid Zone, Xinjiang Normal University, Urumqi 830054, China；
2College of Resource and Environment Sciences, Xinjiang University, Urumqi 830046, China)
• Online:2014-10-10 Published:2014-10-10

Abstract: In order to understand the status of heavy metal contents in Yanqi basin, a typical oasis basin in arid region, we collected soil samples and measured the contents of Pb, Mn, As, Zn, Ni and Hg. The multivariate statistical analysis and geostatistical analysis methods in combination with administrative division, land use types and the National Standard of Soil Quality (GB 15618-1995) were applied to study the spatial distribution characteristics, source, and regional differences of heavy metals in the soils of Yanqi basin. The results showed that the average contents of the six heavy metals in Yanqi basin was in order of Zn > Pb > Mn > As > Ni > Hg. The maximum contents of Zn, Pb, Ni and As exceeded the soil background values of Xinjiang, but were still within the second grade of the national standard. Geostatistical analysis showed that the contents of As, Pb, Hg and Zn were higher in the northwestern Yanqi county and Hejing county, while Mn and Ni had higher contents in southeastern and southwestern Heshuo county and Bohu county. The contents of As, Hg, Pb and Zn in different land use types were in order of cropland > grassland > bare land > wetland, while the contents of Mn and Ni were in order of bare land > grassland > wetland > cropland. According to the background of the sampling sites, As, Pb, Hg and Zn mainly originated from anthropogenic pollution, while Mn and Ni mainly originated from natural environment. Our results suggested that recent economic development had negative influences on heavy metal contents in the cropland and some other land use types of the west of the basin. Therefore, we should pay more attention on such influence and take measures to prevent the pollution of heavy metals in soils of Yanqi basin.