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Mar Pollut Bull. 2018 Jan;126:293-303. doi: 10.1016/j.marpolbul.2017.11.017. Epub 2017 Nov 20.

Assessment of metal contamination in estuarine surface sediments from Dongying City, China: Use of a modified ecological risk index.

Author information

1
College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, PR China; The Key Laboratory of Marine Environment and Ecology, Ministry of Education, Qingdao 266100, PR China.
2
College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, PR China; The Key Laboratory of Marine Environment and Ecology, Ministry of Education, Qingdao 266100, PR China. Electronic address: mengfanping@ouc.edu.cn.
3
Dongying Marine and Fishery Environmental Monitoring Center, Dongying 257091, PR China.

Abstract

Surface sediments and clam Meretrix meretrix were collected from a northern estuarine region in Dongying City, China. Sediments were analysed for heavy metals (Hg, As, Cd, Cr, Cu, Pb, and Zn) and the clams were tested for metallothioneins (MTs) and lysosomal membrane stability (LMS). The heavy metal total concentrations decreased in the order of Cr>Zn>Cu>Pb>As>Cd>Hg. The results of Bureau Communautaire de Référence (BCR) sequential extraction of heavy metals showed that the geochemical speciation of all heavy metals was dominated by residual fraction. According to the responses of biomarkers in M. meretrix, the modified potential ecological risk index (PERI-B) can more accurately reflect heavy metals pollution. PERI-B showed all sediment samples have low or moderate risk, except at site S10 (considerable risk), and the main contribution of ecological risk heavy metals were Cd and Hg.

KEYWORDS:

Biomarkers; Ecological risk assessment; Geochemical speciation; Heavy metals; Sediments

PMID:
29421100
DOI:
10.1016/j.marpolbul.2017.11.017
[Indexed for MEDLINE]

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