农业环境科学学报2011，Vol.30Issue(8)：1553-1560,8.
太原市污灌区土壤重金属污染现状评价
Access of Heavy Metals Pollution of the Sewage Irrigation Region in Taiyuan, China
摘要
Abstract
Distribution characteristics of soil heavy metals in the sewage irrigation area in Taiyuan were investigated and analyzed. The results showed that concentrations of nine heavy metals( Pb, Zn, Cu, Ni, Mn, Cr, As, Hg and Cd) delected in the studied soils did not exceed the National Standard for Soil Environment Quality (GB 15618-1995), but they were higher than background values of Taiyuan soil. According to the correlation analysis of various heavy metals, there was a remarkable correlation among Pb, Zn, Cu, Ni, Mn, Cr, As and Cd, which suggested they might have the same origin. Hg was considered as a dominant element causing soil heavy metal pollution in the area. The order of typical heavy metal pollution extent was Hg>Cd>Pb>As>Cu>Zn>Cr>Mn>Ni. The mean value of single-factor indices of soil heavy metals in all soil samples has exceeded 1. Comprehensive pollution index of soil heavy metal was 2.81, the level of pollution was moderately pollution. The single-factor polluted index and the synthesis polluted index had similar spatial distribution pattern which revealed high concentration in the southeast and south-central parts of the region. Furthermore, measures, including factor analysis and in situ investigation, were taken to identify the main sources of heavy metals contamination, and it showed that Hg contamination resulted from anthropogenic effect as well as deposition of coal combustion. Cd, Zn, Pb, and Cu contamination were mainly from sewage irrigation, and atmosphere deposition also makes certain contribution. Ni, Mn, As and Cr contamination were attributed to sewage irrigation. Hg and Cd, which were the priority pollutants, should be frequently monitored and closely regulated in the sewage-irrigated soils in Taiyuan city.关键词
土壤/重金属/污水灌溉/污染评价/太原市Key words
soil/ heavy metal/ sewage irrigation/ pollution assessment/ Taiyuan分类
资源环境引用本文复制引用
解文艳,樊贵盛,周怀平,解静芳,关春林..太原市污灌区土壤重金属污染现状评价[J].农业环境科学学报,2011,30(8):1553-1560,8.基金项目
太原市科技明星专项项目(08121016) （08121016）
太原市环保局资助项目 （）
