Speciation and Risk of Heavy Metals in Surface Sediments of Different Types of Water Bodies in Baiyangdian Lake

被引：5

作者：

Xu M.-Y. ^{[1
,2
]}

Zhang C. ^{[2
]}

Shan B.-Q. ^{[2
,3
]}

Liu C. ^{[4
]}

机构：

[1] College of Environment, Liaoning University, Shenyang

[2] State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing

[3] University of Chinese Academy of Sciences, Beijing

[4] Chinese Research Academy of Environmental Sciences, Beijing

来源：

Huanjing Kexue/Environmental Science | 2022年 / 43卷 / 09期

关键词：

Baiyangdian Lake; bioavailability; chemical speciation; heavy metals; sediment;

D O I：

10.13227/j.hjkx.202110151

中图分类号：

学科分类号：

摘要：

The morphological characteristics of Cd, Cr, Cu, Ni, Pb, and Zn in sediments were analyzed using an improved BCR extraction method in four water types of Baiyangdian Lake: watercourse, trench, lake surface, and fish pond. The potential ecological risk index, secondary and primary phases, and risk assessment codes were used to systematically assess the pollution level and ecological risk of heavy metals in surface sediments. The results showed that: ➀ the mean contents of heavy metals Cd, Cu, and Zn in the sediments were 0. 37, 28. 49, and 83. 08 mg•kg-1, respectively, 94. 91%, 73.91%, and 46.39% of which exceeded the soil background value. ➁ Cd was dominated by the non-residual fraction (F1 + F2 + F3) with a fraction ranging from 54% to 97%, whereas Cr was dominated by the residual fraction (F4) with a mass fraction ranging from 87% to 99%. Cu, Ni, Pb, and Zn were mainly in the fraction of residual fraction. In the non-residual fraction, Cu and Ni were mainly in the oxidizable fraction (F3) state, whereas Pb and Zn were mainly in the reducible fraction (F2) state. ➂ The RAC risk assessment results showed that there were 68.97%, 39.89%, 54.84%, and 49.78% points in channel, trench, open water, and fish pond samples, respectively, of Cd at high risk. The Cu, Ni, and Pb were at low risk. In general, the overall heavy metal pollution level in Baiyangdian Lake was low, but Cd had ecological risk and high bioavailability in the Fuhe River of the Nanliuzhuang area and the Baigouyin River. © 2022 Science Press. All rights reserved.

引用

页码：4532 / 4542

页数：10

共 42 条

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