摘要
通过对浙中地区主要水生蔬菜基地的铅、镉、铬、铜、锌、砷进行调查研究.结果表明:土壤重金属平均含量均高于背景值;水体中铅、铬、铜、锌平均含量较低,砷、镉未检测出.采用单因子污染指数与内梅罗综合污染指数相结合的方法对水生蔬菜污染情况及其生长环境质量状况进行评价.结果显示:土壤中镉的单项污染指数为5.37,其他几种重金属均小于0.70,说明调查区域的土壤受到重度镉污染,其他几种重金属污染不明显.综合污染指数为3.87,属于重度级污染;水体中重金属的单项污染指数均小于1,综合污染指数小于0.70,属于安全级.水生蔬菜重金属的单项污染指数大小排序为:铅(2.95)>铬(2.24)>锌(1.54)>镉(0.53)>铜(0.40)>砷(0.27),表明调查区域水生蔬菜已经受到铅、铬污染,锌轻污染,而镉、铜、砷没有构成污染.综合污染指数为2.29,表明各重金属对水生蔬菜的复合污染属中度级污染.
Through investigating of Pb, Cd, Cr, Cu and Zn of main aquatic vegetable bases, results showed that the average heavy metals concentration was much higher than the corresponding background values. By the method of combine single factor pollution index and Nemorow integrated pollution index, results showed that the single index of Cd in soil was 5.37 and other heavy metals index were all less than 0.70. It indicated that the soil in surveyed area had been heavily by Cd and other heavy metals＇ pollution were not obvious. Inte- grated pollution index was 3.87 belong to serious pollution level. In aquatic environment single index of heavy metals＇ pollution were all below 1, integrated pollution index below 0.70 which belong to security level. The single pollution index of heavy metals in aquatic vegetable area was Pb （ 2.95 ） 〉 Cr （ 2.24 ） 〉 Zn （ 1.54 ） 〉Cd{0.53） 〉 Cu（0.40） 〉 As（0.27） which showed that the investigated vegetables were heavily polluted by Pb and Cr, polluted by Zn, not polluted by Cd, Cu and As. Integrated pollution index was 2.29 which indi- cated compound pollution of these heavy metals belong to secondary pollution level.
出处
《浙江师范大学学报（自然科学版）》
CAS
2016年第3期338-345,共8页
Journal of Zhejiang Normal University:Natural Sciences
基金
金华市科技局项目资助(KYZKJY12011)
浙江省环境保护科学研究院课题项目资助(KYH06Y15179)
关键词
水生蔬菜
重金属
污染调查
评价
浙江
aquatic vegetables
heavy metals
pollution survey
evaluation
Zhejiang
