Department of Environmental Science and Engineering, Fudan University, Shanghai 200438, China.
Guangdong Provincial Key Lab of Fishery Ecology and Environment; South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510300, China.
Mar Pollut Bull. 2020 Jan;150:110717. doi: 10.1016/j.marpolbul.2019.110717. Epub 2019 Nov 18.
Bivalves are one of the key components of the biogeochemical cycle in the marine system, and respond to heavy metal (HM) sensitively as filter feeders. To determine relationship of HMs in edible bivalve and seawater and HM effects on human health when digesting bivalves, HMs were analyzed in bivalves and seawater. The results showed that the mean HM concentrations in bivalves decreased in the order of Zn > Cu > Cr > Pb > As > Cd > Hg. Generally, all the bioconcentration factor values of bivalves were higher than 100, suggesting that bivalves have a high bioaccumulation ability. Nonmetric multidimensional scaling analysis indicated that all bivalves have a high bioaccumulation capacity for Cu and Zn. It was found that there are health risks associated with consuming bivalves, and children are more vulnerable than adults. Finally, the maximum allowable consumption rates of non-carcinogenic and carcinogenic risk were determined. These results provide the underlying insights needed to guide the consumption of seafood.
双壳类动物是海洋系统生物地球化学循环的关键组成部分之一，作为滤食动物对重金属 (HM) 敏感。为了确定可食用双壳贝类和海水中的 HMs 之间的关系，以及在食用贝类时 HMs 对人类健康的影响，对双壳贝类和海水中的 HMs 进行了分析。结果表明，双壳贝类中 HMs 的平均浓度顺序为 Zn > Cu > Cr > Pb > As > Cd > Hg。通常，所有双壳贝类的生物浓缩系数值均高于 100，表明双壳贝类具有很强的生物积累能力。非度量多维尺度分析表明，所有双壳贝类对 Cu 和 Zn 的生物积累能力都很高。研究发现，食用双壳贝类存在健康风险，儿童比成年人更容易受到影响。最后，确定了非致癌和致癌风险的最大允许消费率。这些结果为指导海鲜消费提供了必要的基础见解。
