Heavy metal fractionation and ecological risk implications in the intertidal surface sediments of Zhelin Bay, South China

被引：58
作者：
Gu, Yang-Guang [1 ,2 ,3 ]
机构：
[1] Chinese Acad Fishery Sci, South China Sea Fisheries Res Inst, Guangzhou 510300, Guangdong, Peoples R China
[2] Key Lab Fishery Ecol & Environm, Guangzhou 510300, Guangdong, Peoples R China
[3] Minist Agr, Key Lab Open Sea Fishery Dev, Guangzhou 510300, Guangdong, Peoples R China
来源：
MARINE POLLUTION BULLETIN | 2018年 / 129卷 / 02期
基金：
中国国家自然科学基金;
关键词：
Heavy metals; Fractionation; Intertidal sediments; Risk assessment; Zhelin Bay; PEARL RIVER ESTUARY; SEQUENTIAL EXTRACTION PROCEDURES; HUMAN HEALTH IMPLICATIONS; EASTERN GUANGDONG COAST; TRACE-METALS; QUALITY GUIDELINES; MARINE-SEDIMENTS; CONTAMINATION ASSESSMENT; MARICULTURE BASE; BIOLOGICAL RISK;
D O I：
10.1016/j.marpolbul.2017.10.047
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Intertidal surface sediments collected from Zhelin Bay, the largest mariculture base of eastern Guangdong Province of China, were analyzed for total metal concentrations and chemical speciation. Average total metal concentrations (mg/kg) were 0.063 (Cd), 35.69 (Pb), 23.07 (Cr), 7.50 (Ni), 7.95 (Cu), 74.95 (Zn), and 751.32 (Mn). Concentrations of Cd, Cu, Zn, and Mn were significantly higher than the corresponding background values of Zhelin Bay. All studied metals were dominated by residual fractions, whereas the second relatively higher average portions of Cd (24.10%) and Mn (15.17%) were strongly associated with the acid-soluble fraction. Overall, the intertidal surface sediments of Zhelin Bay were only slightly polluted based on the pollution load index (PLI), with a 21% probability of toxicity based on the mean effects range-median quotient. The metals Cd and Mn posed medium to high risk levels based on the method of risk assessment code (RAC).
引用
收藏
页码：905 / 912
页数：8
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