石河子市表层土壤重金属元素富集与功能区分异研究

Assessment of Heavy Metal Distribution in Surface Soils of Different Area in Shihezi,China

[目标]探讨石河子市内人类活动对自然表土及城市生态系统的影响。[方法]利用X光谱仪、酸度计、筛分法与激光粒度仪,测量新疆石河子市表土层样品的重金属元素、pH及>0.1 m、<0.001 mm的粒径组分。[结果]与我国土壤元素背景值相比,城市表土中As、Cr、Cu、Mn、Ni、Zn等平均浓度较高,Pb相对于我国土壤元素背景值浓度较低。[结论]As、Cr、Cu、Mn、Ni、Pb、Zn等重金属元素的富集因子在各功能区有明显的差异,表明由不同程度、方式的人类活动引起表土重金属元素聚集程度的差异。

[Objective] The research aimed to study the effects of human activities in Shihezi City on spatial distribution and urban ecology.[Method] The samples form Shihezi City were collected and analyzed.pH was analyzed by Sartorius PB-10 pH meter.The particle size distribution was analyzed using the Malverns Mastersizer-S.The non-dust fraction（particles 〉0.1mm） was separated by wet-sieving.As,Cu,Cr,Mn,Ni,Pb and Zn were analyzed using XRF.[Result] Compared with background value of soil heavy metal elements in China,the concentration of As,Cr,Cu,Mn,Ni and Zn was higher and the concentration of Pb was lower.[Conclusion]There was notable variation among the enrichment factor of As,Cr,Cu,Mn,Ni,Pb and Zn in different area and is was affected by parent material,human activity,industry,and traffic pollution.