Metal pollution status in Zhelin Bay surface sediments inferred from a sequential extraction technique, South China Sea

Yang-Guang Gu; Qin Lin; Shi-Jun Jiang; Zhao-Hui Wang

doi:10.1016/j.marpolbul.2014.01.030

Metal pollution status in Zhelin Bay surface sediments inferred from a sequential extraction technique, South China Sea

Mar Pollut Bull. 2014 Apr 15;81(1):256-61. doi: 10.1016/j.marpolbul.2014.01.030. Epub 2014 Jan 31.

Authors

Yang-Guang Gu¹, Qin Lin², Shi-Jun Jiang³, Zhao-Hui Wang⁴

Affiliations

¹ South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510300, China; Key Laboratory of Fishery Ecology and Environment, Guangdong Province, China; Key Laboratory of South China Sea Fishery Resources Exploitation & Utilization, Ministry of Agriculture, Guangzhou 510300, China.
² South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510300, China; Key Laboratory of Fishery Ecology and Environment, Guangdong Province, China; Key Laboratory of South China Sea Fishery Resources Exploitation & Utilization, Ministry of Agriculture, Guangzhou 510300, China. Electronic address: hydrobio@163.com.
³ Key Laboratory of Eutrophication and Red Tide Prevention of Guangdong Higher Education Institutes, Jinan University, Guangzhou 510632, China. Electronic address: 114948568@qq.com.
⁴ Key Laboratory of Eutrophication and Red Tide Prevention of Guangdong Higher Education Institutes, Jinan University, Guangzhou 510632, China.

PMID: 24486039
DOI: 10.1016/j.marpolbul.2014.01.030

Abstract

Surface sediments collected from Zhelin Bay, the largest mariculture base of eastern Guangdong Province, were analyzed for total metal concentrations and chemical speciation. The results demonstrated that the average total concentration (mg/kg) ranges were 36.7-65.8 (Pb), 53.8-98.8 (Cr), 39.0-87.1 (Ni), 50.9-144.5 (Cu), and 175.0-251.2 (Zn), which were clearly higher with respect to their corresponding benchmark values. The predominant speciation of Pb was reducible and comprised a residual fraction, whereas a major portion (57.6-95.4%) of Cr, Ni, Cu, and Zn was strongly associated with the residual fractions. Taking as a whole, surface sediments of Zhelin Bay had a 21% probability of toxicity based on the mean effects range-median quotient.

Keywords: Chemical speciation; Ecological risk; Metals; Sediment analysis; Zhelin Bay.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Bays*
Chemical Fractionation / methods*
China
Environmental Monitoring / methods*
Geologic Sediments / chemistry*
Metals / analysis
Metals, Heavy / chemistry*
Oceans and Seas
Water Pollutants, Chemical / chemistry*

Substances

Metals
Metals, Heavy
Water Pollutants, Chemical