摘要
为分析宿州地区石灰岩土壤元素地球化学特征,采集了石灰岩土壤样品,进行主、微量元素测试,利用SPSS软件对测试结果进行相关性及主成分分析,并采用富集因子和地累积指数方法对重金属污染程度进行了评价。结果表明:宿州地区石灰岩土壤主要由Si和Ca构成,元素Ca和Th富集明显,Al亏损严重,其他元素基本与背景值相当;重金属元素Pb、Zn、Cr符合国家一级土壤标准,Cu和As在国家一级土壤和二级土壤之间,重金属污染程度为Cu>As>Cr>Zn>Pb>V;元素Ca与V、Zr主要受控于PC1,指示了陆源碎屑的混染;Pb、Sr和As主要受控于PC2,主要受石灰岩风化的影响;PC3包括Zn、Cu、Al,反映了人类农业活动的影响;结合区域背景推断Cu、Zn主要受人类农业活动(肥料)的影响,As可能和皮革、纺织品等人类活动有关。
The aim of our research is to understand the geochemical characteristics of limestone soil from the Suzhou area. The major and trace elements analysis was carried out on the limestone soil samples collected from the Suzhou area, the relativity and principal analysis of the testing results were studied based on SPSS, the degrees of heavy metals pollution were evaluated by such methods as enrichment factor and geoaccumulation index. The results showed that the limestone soil from the Suzhou areaconsists mainly contains Si and Ca, and Ca and Th are enriched significantly, otherwise A1 is lost, the other elements in the samples are conformed with the background values. The heavy metals of the samples can be subdivided into tow types： Pb, Zn and Cr are below the first quality standard level, Cu and As are between the first and second levels of quality standard, the heavy metal element pollution degrees are presented as follows： Cu〉As〉Cr〉Zn〉Pb〉V. Ca,V and Zr are controIled by the first factor, indicating the contamination of detrital; Pb, Sr and As are controlled by the second factor, influenced by limestone weathering; the third factor involves Zn, Cu and A1, which showed the effect by agriculture. In combination with other pieces of evidence, human activity （agricultural activity） is considered to be the source of Cu and Zn, whereas the release of leather and dry goods is related to the pollution of As.
出处
《地球与环境》
CAS
CSCD
北大核心
2012年第4期529-535,共7页
Earth and Environment
基金
国家自然科学基金(40873015
41173106)
安徽省教育厅自然科学项目(KJ2011A261
KJ2011B177)
宿州学院科研平台开放课题(2010YKF28
2011YKF22)
关键词
石灰岩土壤
重金属元素
富集因子
主成份分析
宿州
limestone soil
heavy metal element
enrichment factor
principle analysis
Suzhou area
