某污染场地周边土壤无机元素空间分布特征研究

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Studyon the spatial distributioncharacteristicsof inorganic elements inthe surroundingsoilofapollutedsite

ZENG Junyuan XU Yifan DUAN XuemeiJIYu （Changzhou Environmental Monitoring Center， Changzhou 2130O4， China）

AbstractInthis study，with reference to theChinese national standard method GB/T14506.30-2O10“Methods for chemicalanalysisof silicaterocks-Part3O：Determinationof44elements”，thecontentsof4Oinorganicelements （including LiandBe）insoil samplescolected from 2O sampling points across5directions（due east，due west，due south，due north，and southwest）were determined.The distribution characteristicsof these elements across difrent sampling points were analyzed using the single factor polution index （ Pip ）， geo-accumulation index Igeo， ， and coefficient of variation （ CV ）.Theresults indicatedthat the contentsofnine inorganic elements （As，Cd，Cu，Pb，Ni，Sb，Be，Co，V）in the study area ranged from O.406 to 101.000mg/kg ，all of which werebelow the risk screeningvalues.Furthermore，all （20 Pip values were less than 1，indicating an“unpolluted”status.Compared to the soil background values of the eastern plains， the Igeo values of 29 elements （Li， Be，and Sc，etc.） were ⩽0 ， suggesting no enrichment. 4 elements （Cu， Gd， W， and Bi） had Igeo values between O and1，indicating slight to moderate enrichment.4 elements （Zn，Ag，Cd，and Pb） showed Igeo values between 1 and 2，indicating moderate enrichment.In and Sb have Igeo values between 2 and 3， indicating moderate to strong enrichment. The Igeo value of Sn was 4.O9，demonstrating strong to extreme enrichment. The CV values for 11 elements （including Cu， Zn，and Ag） in the study area’s soil were greater than 0.4， indicating anon-uniform distribution.Moreover，the maximum concentrations of unevenlydistributed elements were predominantly located to the east，while the peak concentration of W was found 0.5km to the southwest， and the peak concentrationsof Cu，Zn，and Mo werelocated O.5 km to the north.These findings provide areference for soil environmental monitoring.

Keywordssoil; inorganic elements;distribution characteristics;coefficient of variation

王壤生态系统作为人类生存和发展的物质基础之一，受自然活动及人类生产生活的综合影响，始终处在动态变化之中。（剩余4663字）