中国南方柘林湾潮间带表层沉积物中重金属的分馏及其生态风险意义。
Heavy metal fractionation and ecological risk implications in the intertidal surface sediments of Zhelin Bay, South China.
机构信息
South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510300, China; Key laboratory of Fishery Ecology and Environment, Guangdong Province, Guangzhou 510300, China; Key Laboratory of Open-Sea Fishery Development, Ministry of Agriculture, Guangzhou 510300, China.
出版信息
Mar Pollut Bull. 2018 Apr;129(2):905-912. doi: 10.1016/j.marpolbul.2017.10.047. Epub 2017 Oct 27.
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).
从中国广东省东部最大的海水养殖基地柘林湾采集的潮间带表层沉积物，用于分析总金属浓度和化学形态。平均总金属浓度（mg/kg）分别为 0.063（镉）、35.69（铅）、23.07（铬）、7.50（镍）、7.95（铜）、74.95（锌）和 751.32（锰）。镉、铜、锌和锰的浓度明显高于柘林湾的相应背景值。所有研究的金属都以残余态为主，而镉（24.10%）和锰（15.17%）的第二高平均部分与酸可溶部分强烈相关。总体而言，根据污染负荷指数（PLI），柘林湾的潮间带表层沉积物仅受到轻微污染，基于平均效应范围-中值商，毒性的概率为 21%。根据风险评估代码（RAC）方法，金属镉和锰存在中至高风险水平。
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