摘要
通过对通辽碧波水务有限公司和通辽经济开发区污水处理厂出水水质与排污渠两侧农田土壤中重金属镉、砷、铬、铅、镍、锌和铜含量进行对比,研究灌溉水质对土壤重金属富集的影响.结果表明:污灌对土壤pH的影响很小,但对土壤含水率和重金属富集有一定的影响,工业废水处理水会增加土壤含水率,二道河灌区土壤中Cu存在一定程度富集.根据内梅罗综合污染指数法,各灌区土壤均属于安全级别,处于清洁水平.单因子污染指数法表明As(0.742)>Cu(0.606)>Cd(0.560)>Cr(0.239)>Ni(0.175)>Zn(0.170)>Pb(0.129),二道河灌区土壤中Cu处于轻度污染状态.
Though comparing the content of heavy metals in two sides of drain sewage ditch and the ef- fluent quality of Bibo Water Company and Economic Development Zone Sewage Treatment Plan in Tongliao City, this paper studies the influence of sewage irrigation on the enrichment of heavy metals in soil. The results show that sewage irrigation has little effect on pH of soil, but has an influence on moisture and enrichment of heavy metals in soil. Irrigation with treatment industrial wastewater can increase the moisture of soil and the copper had a certain enrichment in Two River Irrigation Area. Ac- cording to the comprehensive Nemerow pollution index, each irrigation areas are belong to the security level and clean level. The single factor pollution index indicate that heavy metals contamination in the order As（0.742） 〉Cu（0. 606） 〉 CA（0.560） 〉Cr（0.239） 〉 Ni（0. 175）〉Zn（0. 170） 〉Pb（0. 129）. The copper is light pollution level in the Two River Irrigation Area. Key words：environmental science; reclaimed wastewater quality; soil heavy metal; Nemerow pollution index method
出处
《北京交通大学学报》
CAS
CSCD
北大核心
2015年第4期112-117,共6页
JOURNAL OF BEIJING JIAOTONG UNIVERSITY
基金
国家自然科学基金资助项目(41103007)
内蒙古科技发展基金资助项目(2009058)
关键词
环境科学
灌溉水质
土壤重金属
内梅罗污染指数法
environmental science
reclaimed wastewater quality
soil heavy metal
Nemerow pollution index method
