太子河本溪城区段水体中重金属分布特征及形态分析

doi:10.3969/j.issn.1673-503X.2019.01.013

Abstract

Abstract:

In order to investigate the distribution characteristics and speciation of heavy metals in Taizi River flowing through Benxi urban area,the concentration and distribution of heavy metals including Zn, Pb, Cd, Cu, Mn, Cr, Se in the river were analyzed.At the same time,the speciations of heavy metals were simulated using PHREEQ software.The results show that Mn and Cr are more serious pollutants relative to the other five kinds of heavy metals due to their average concentrations exceeding the national surface water environmental quality standards IV(GB 3838-2002).Multivariate statistical analysis shows that the seven heavy metals can be classified into two principal components.More specifically,the first principal component i.e.PC-I including Mn, Cd and Se is mainly affected by anthropogenic pollution factors,while the second principal component i.e.PC-II containing Zn is mainly influenced by natural geological background factors.Heavy metal pollution index (HPI) ranges from 28.49 to 473.76,which indicates that the degrees of heavy metals pollution in some parts of the sampling area go beyond the acceptable level.The speciation analysis results show that the seven heavy metals in water exist mainly in the forms of colloform (Cu(OH)₂) or precipitate (ZnCO₃,PbCO₃,MnCO₃,et al) and the concentrations of dissolved forms are lower.The research conclusion can provide references for the water pollution control and river restoration in the Taizi River flowing through Benxi urban area.

Key words: Heavy metals, Heavy metal pollution index (HPI), Speciation analysis

CLC Number:

X522

WANG Jian, MA Bo-jian, YU Ying-tan, LU Bing, WANG Shou-peng, LIU Lin, ZHANG Xue, ZHANG Chao-xing. Distribution characteristics and speciation analysis of heavy metal in Taizi River flowing through Benxi urban area[J]. Journal of Meteorology and Environment, 2019, 35(1): 94-100.

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Distribution characteristics and speciation analysis of heavy metal in Taizi River flowing through Benxi urban area

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