Distribution Characteristics and Source Analysis of Heavy Metals in Sediments of the Middle Reaches of Fenhe River
In order to understand the distribution of heavy metal pollution in bottom mud and reveal the pollution sources in the middle rea-ches of the Fenhe River,the section of the river from the inlet of Ciyao River to the 2 km below the inlet of Wenyu River was selected as the research object,a total of 35 sediment samples(sediment depth 0-70 cm)were collected from 5 sections.It analyzed its vertical distribution characteristics along the river channel and revealed the source of pollution by using principal component analysis(PCA)and positive definite matrix factor analysis(PMF).The results show that the heavy metals(Hg,Cu,Pb,Cr and Ni)in the sediment of the middle reaches of the Fenhe River are generally enriched at a depth of 40-70 cm,the content at 40-70 cm depth is 1.02-2.82 times that at 0-40 cm depth and its vertical distribution may be related to the history of local industrial pollution.By analyzing the distribution characteristics and sources of sedi-ment from 0 to 40 cm deep along the river course,it is found that the distribution trend of the five heavy metals is similar along the river course,and the content of the five heavy metals appears large values at the inlet of Ciyao River into Fenhe and the inlet of Wenyu River into Fenhe.The content of Pb and Hg exceeds the standard seriously,which are 1.94 and 3.91 times of the local soil background value respective-ly,and the maximum value appears at the inlet of Wenyu River into Fenhe River.Heavy metals Pb,Cr and Ni are mainly from industrial pro-duction,Cu is mainly from industrial production and partly from algae accumulation and Hg is mainly from algae accumulation and partly from industrial production.
bottom mudheavy metalvertical distributiondistributed along the riversourcemiddle reaches of Fenhe River
国家科技期刊平台
NSTL
万方数据
