Enrichment and geochemical mobility of heavy metals in bottom sediment of the Hoedong reservoir, Korea and their source apportionment

被引：54

作者：

Lee, Pyeong-Koo ^{[1
]}

Kang, Min-Ju ^{[2
]}

Yu, Soonyoung ^{[3
]}

Ko, Kyung-Seok ^{[1
]}

Ha, Kyoochul ^{[1
]}

Shin, Seong-Cheon ^{[1
]}

Park, Jung Han ^{[4
]}

机构：

[1] Korea Inst Geosci & Mineral Resources, 124 Gwahang No, Taejon 34132, South Korea

[2] Korea Environm Corp, Dept Soil & Groundwater, 42 Hwangyeong Ro, Incheon 404708, South Korea

[3] Korea Univ, Korea Storage Environm Management K COSEM Res Ctr, Seoul 02841, South Korea

[4] Minist Sci ICT & Future Planning, Sci & Technol Policy Coordinat Div, 47 Gwanmun Ro, Gwacheon Si 13809, Gyeonggi Do, South Korea

来源：

CHEMOSPHERE | 2017年 / 184卷

关键词：

Reservoir; Sediment; Heavy metals; Metal partitioning; Pb isotopes; NON-ASIAN DUST; SEQUENTIAL EXTRACTION; CHEMICAL ASSOCIATIONS; ISOTOPIC COMPOSITION; CENTRAL SCOTLAND; LAKE-SEDIMENTS; LEAD POLLUTION; STREET DUSTS; SOILS; CONTAMINATION;

D O I：

10.1016/j.chemosphere.2017.05.124

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Physicochemical characteristics of bottom sediment in the Hoedong reservoir were studied to evaluate the effectiveness of the reservoir as traps for trace metals. Roadside soil, stream sediment and background soil were also studied for comparison. Sequential extractions were carried out, and lead isotopic compositions of each extraction were determined to apportion Pb sources. Besides, particle size distribution of roadside soil, and metal concentrations and Pb isotopes of each size group were determined to characterize metal contamination. In result, Zn and Cu were enriched in sediment through roadside soil. The data on metal partitioning implied that Zn posed potential hazards for water quality. Meanwhile, the noticeable reduction of the Pb-206/(207) Pb isotopic ratio in the acid-soluble fraction in the size group 200 mu m - 2 mm of national roadside soil indicated that this size group was highly contaminated by automotive emission with precipitation of acid-soluble secondary minerals during evaporation. Based on the Pb isotopic ratios, the dry deposition of Asian dust (AD) and non-Asian dust (NAD) affected roadside soil, while the effects of AD and NAD on bottom sediment appeared to be low given the low metal concentrations in sediment. Metal concentrations and Pb isotopic compositions indicated that sediments were a mixture of background and roadside soil. Source apportionment calculations showed that the average proportion of traffic Pb in bottom and stream sediments was respectively 34 and 31% in non residual fractions, and 26 and 28% in residual fraction. The residual fraction of sediments appeared to be as contaminated as the non-residual fractions. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：74 / 85

页数：12

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