Distributions, sources and ecological risk assessment of arsenic and mercury in the surface sediments of the southwestern coastal Laizhou Bay, Bohai Sea

MARINE POLLUTION BULLETIN

卷:99

Article

Zhuang, Wen^1,2  Gao, Xuelu¹ 

[1] Chinese Acad Sci, Key Lab Coastal Environm Proc & Ecol Remediat, Yantai Inst Coastal Zone Res, Yantai 264003, Shandong, Peoples R China

[2] Zaozhuang Univ, Coll City & Architecture Engn, Zaozhuang 277160, Shandong, Peoples R China

关键词: Heavy metal;    Sediment quality;    Coastal environment;    Ecological risk;    Laizhou Bay;   

DOI  :  10.1016/j.marpolbul.2015.07.037

来源: Elsevier

【 摘 要 】

The spatial distributions of As and Hg in riverine and marine surface sediments of the coastal southwestern Laizhou Bay were obtained, and multiple indices and guidelines were applied to assess their contamination and ecological risks. The As concentrations in riverine sediments were close to those in marine sediments, and on the whole the dominant proportion of As was identified to be from natural sources. The Hg concentrations in riverine sediments were much higher than those in marine sediments, so river transportation was likely the main way of Hg into the southwestern Laizhou Bay. In respect of As, the sediment quality was fine according to the risk assessment methods used; in contrast, Hg presented an extremely contaminated status with a very high ecological risk in some riverine sediments, while most of the marine sediments were relatively much less polluted by Hg and under a lower ecological risk from it. (C) 2015 Elsevier Ltd. All rights reserved.

【 授权许可】

Free