摘要
为进一步认识人类活动对河流重金属污染的影响,以浙江省金华市东阳江边滩表层沉积物为研究对象进行粒度和重金属元素分析.利用污染负荷指数法、地质累积指数法和富集系数法对重金属污染状况进行了评价,并利用主成分分析和聚类分析方法探讨重金属污染来源.结果显示:沉积物中各重金属元素均呈现不同程度累积和富集态势,尤以Cu污染最为严重,Ni和Mn两种元素与沉积物颗粒关系较为密切;义乌-东阳城区段沉积物重金属污染程度最高,其次为婺城区段,金东区段和东阳乡镇段则较低; Pb,Zn,Cu,Ni,Cr元素的空间变化趋势相似,均在义乌-东阳城区段呈现高值,其次为婺城区段,金东区段和东阳乡镇段则较低,而Mn元素则呈现与上述元素相反的变化趋势.重金属来源分析表明,Pb,Zn,Cu,Ni,Cr可能来自于工业生产及汽车尾气排放,而Mn元素则主要受控于地质背景.
50 surface samples of flood plain from the Dongyang River basin were collected,particle size and heavy metal concentration analysis were conducted,and combined with the Pollution Load Index,Index of geoaccumulation,Enrichment Factor analysis and Principal Component Analysis and Cluster Analysis,it was assessed the heavy metal pollution conditions,as well as its influence factors.The results revealed that the mean content of Cu,Zn,Pb,Ni,Cr and Mn were 86.2,242.9,79.1,28.1,71.9 and 970.8 mg 5kg+-1,respectively,all of which exceeded the background values in Jinhua soils.The pollution assessment results showed that all heavy metal exhibited different degree of pollutioned,especially Cu was the most seriously pollution and need to be particularly controlled.From upstream to downstream,the degree of heavy metal pollution increased first and then decreased,and increased in Wucheng area finally,Dongyang City and Yiwu City areas were the most serious polluted.Pb,Zn,Cu,Ni,Cr might came from industrial production or vehicle emissions,while Mn was mainly controlled by geological background.
作者
龚亚玲
胡忠行
周云鹏
韩宇轩
袁姚绮
吕佳欣
徐英华
GONG Yaling;HU Zhongxing;ZHOU Yunpeng;HAN Yuxuan;YUAN Yaoqi;Lv Jiaxin;XU Yinghua(College of Geography and Environment Sciences,Zhejiang Normal University,Jinhua 321004,China)
出处
《浙江师范大学学报（自然科学版）》
CAS
2018年第4期466-473,共8页
Journal of Zhejiang Normal University:Natural Sciences
基金
国家自然科学基金面上项目(41572345)
关键词
河流沉积
粒度
重金属
污染评价
来源分析
东阳江
river sediments
particle size
heavy metal
pollution assessment
source analysis
Dongyang River
