Concentrations, speciation, and ecological risk of heavy metals in the sediment of the Songhua River in an urban area with petrochemical industries
Concentrations, speciation, and ecological risk of heavy metals in the sediment of the Songhua River in an urban area with petrochemical industries
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石化城区松花江沉积物重金属浓度、形态及生态风险
DOI：
10.1016/j.chemosphere.2018.12.040
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发表时间：
2019-03-01
期刊：
影响因子：
8.8
通讯作者：
Xu, Liang
中科院分区：
文献类型：
--
作者：
Sun, Caiyun;Zhang, Zhenxing;Xu, Liang
对松花江某石化工业区沉积物中Cu、Zn、Pb、Ni和Cr的污染现状及生态风险进行了评价。重金属总量平均浓度最高值出现在封冻期，且最高值出现在石化工业区附近。地积累指数表明，铜是污染最严重的重金属。潜在生态风险指数表明，沉积物中重金属总量和个体含量均为低生态风险。形态分析和风险评价结果表明，沉积物中重金属的迁移性和生物有效性均较低，Cu、Zn、Pb、Ni和Cr的非残留态含量分别为35.2%、37.46%、33.83%、24.59%和36.04%。沉积物中的重金属暴露于没有到中等生态风险。主成分分析结果表明，工业废气排放、机动车尾气排放和生活垃圾是主要污染源。(C)2018爱思唯尔有限公司版权所有
In this study, the pollution status and the ecological risks of heavy metals (Cu, Zn, Pb, Ni and Cr) in the sediments of the Songhua River in an urban area with petrochemical industries were assessed. The highest mean concentration of total heavy metals occurred in the freezing period, and the highest total heavy metal concentrations were observed near the petrochemical industrial area. The geo-accumulation index indicated that Cu was the most contaminated heavy metal. The potential ecological risk index suggested that the total and individual heavy metal concentrations in the sediment were associated with low ecological risk. The speciation and risk assessment code results indicated that these heavy metals in the sediment had potentially low mobility and bioavailability, with non-residual fractions of 35.2% for Cu, 37.46% for Zn, 33.83% for Pb, 24.59% for Ni and 36.04% for Cr based on the total concentrations. These heavy metals in the sediment were exposed to no to medium ecological risks. The principal component analysis results showed that industrial emissions and discharges, vehicular exhaust emissions and residential waste were the primary pollution sources. (C) 2018 Elsevier Ltd. All rights reserved.