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Journal of Chemistry Volume 2018 ,2018-04-22
Spatial Distribution and Contamination Assessment of Heavy Metals in Surface Sediments of the Caofeidian Adjacent Sea after the Land Reclamation, Bohai Bay
Research Article
He Zhu 1 , 2 , 3 Haijian Bing 1 Huapeng Yi 2 Yanhong Wu 1 Zhigao Sun 4
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DOI:10.1155/2018/2049353
Received 2018-01-05, accepted for publication 2018-03-12, Published 2018-03-12
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摘要

Land reclamation can significantly influence spatial distribution of heavy metals in inshore sediments. In this study, the distribution and contamination of heavy metals (Cd, Cr, Cu, Ni, Pb, and Zn) in inshore sediments of Bohai Bay were investigated after the land reclamation of Caofeidian. The results showed that the concentrations of Cd, Cr, Cu, Ni, Pb, and Zn in the sediments were 0.20–0.65, 27.16–115.70, 11.14–39.00, 17.37–65.90, 15.08–24.06, and 41.64–139.56 mg/kg, respectively. These metal concentrations were generally higher in the area of Caofeidian than in other Chinese bays and estuaries. Spatially, the concentrations of Cd, Cr, Cu, Ni, and Zn were markedly lower in the sediments close to Caofeidian compared with other regions, whereas the concentrations of Pb showed an opposite case. Hydrodynamic conditions after the land reclamation were the major factor influencing the distribution of heavy metals in the sediments. Grain sizes dominated the distribution of Cu and Zn, and organic matters and Fe/Mn oxides/hydroxides also determined the distribution of the heavy metals. Multiple contamination indices showed that the inshore sediments were moderately to highly contaminated by Cd and slightly contaminated by other heavy metals. Similarly, Cd showed a high potential ecorisk in the sediments, and other metals were in the low level. Chromium contributed to higher exposure toxicity than other metals by the toxicity unit and toxic risk index. The results of this study indicate that after the land reclamation of Caofeidian the contamination and ecorisk of heavy metals in the sediments markedly decreased in the stronger hydrodynamic areas.

授权许可

Copyright © 2018 He Zhu et al. 2018
This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

图表

The location of the study area and the sampling sites in the Bohai Bay.

The spatial distribution of grain sizes, TOC, Fe, and Mn in the sediments.

The spatial distribution of heavy metals in the sediments.

The spatial distribution of the TUs and TRI of heavy metals in the sediments.

通讯作者

1. Yanhong Wu.Key Laboratory of Mountain Surface Processes and Ecological Regulation, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China, cas.cn.yanhong_wu@yeah.net
2. Zhigao Sun.Key Laboratory of Humid Subtropical Eco-Geographical Process (Fujian Normal University), Ministry of Education, Fuzhou 350007, China, moe.edu.cn.zhigaosun@163.com

推荐引用方式

He Zhu,Haijian Bing,Huapeng Yi,Yanhong Wu,Zhigao Sun. Spatial Distribution and Contamination Assessment of Heavy Metals in Surface Sediments of the Caofeidian Adjacent Sea after the Land Reclamation, Bohai Bay. Journal of Chemistry ,Vol.2018(2018)

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