摘要
鉴于河流沉积物重金属污染评价中存在不确定信息,结合地累积指数,根据盲数相关理论建立研究区重金属含量及其相应背景值浓度表达式,运用盲数可靠分析BM模型及加权归一确定隶属度,对广西古宾河都川段河流表层沉积物进行重金属污染评价。从监测的七种重金属污染隶属等级来看,只有Cd、Cr、Ni隶属清洁等级,其余As、Cu隶属轻度污染,Zn隶属偏中污染。从重金属总体环境情况来看,都川段河流表层沉积物处于清洁状态,但已临近轻度污染。
In view of the uncertain information on the evaluation of heavy metal pollution in river sediments, this paper tries to demonstrate the concentration expression values and their corresponding background content of heavy metals based on the geo accumulation index and the blind number related theory. After determining the membership analysis of BM model and weighted normalization with the blind number reliability, the article evaluates the heavy metal pollution of the river surface sediment on Duchuan in Gubin river of Guangxi. Among the seven pollution grades of monitoring heavy metals, Only Cd, Cr, and Ni belong to the membership of clean grade. The remaining As and Cu belong to the membership of mild pollution, Zn partial pollution. From the overall view, all river sediments from Sichuan are in a clean state and approach the mild pollution.
出处
《钦州学院学报》
2015年第5期77-84,共8页
Journal of Qinzhou University
基金
钦州学院校级科研项目:河流表层沉积物重金属污染评价方法比较研究--以广西古宾河都川段为例(2014XJKY-17B)
广西北部湾生物多样性养护重点实验室
北部湾海洋生物资源开发与保护重点实验室联合资助(2015ZD02)
关键词
古宾河都川段
表层沉积物
重金属污染评价
盲数-地累积指数模型
Duchuan in Gubin river
surface sediments
evaluation of heavy metals pollution
blind geo-accumulation Index