文献类型： 外文期刊

作者： Wu, Xing ¹ ; Jia, Yongfeng ¹ ; Zhu, Huijie ¹ ;

作者机构： 1.Chinese Acad Sci, Key Lab Pollut Ecol & Environm Engn, Inst Appl Ecol, Shenyang 110016, Peoples R China

2.Shandong Acad Agr Sci, Cent Lab, Shandong Key Lab Test Tech Food Qual & Safety, Jinan 250100, Peoples R China

关键词： bioaccumulation;cadmium;ferric hydroxide;particulate organic matter;meretrix meretrix linnaeus

期刊名称：ENVIRONMENTAL POLLUTION （ 影响因子：8.071； 五年影响因子：8.35 ）

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收录情况： SCI

摘要： Ferric hydroxide and particulate organic matter are important pools of trace metals in sediments and control their accumulation by benthic animals. We investigated bioaccumulation of cadmium in bivalve Meretrix meretrix by using a simplified system of laboratory synthesized iron oxides and commercially obtained humic acids to represent the inorganic and organic matrix found in nature. The results showed that bioaccumulation characteristics were distinctly different for these two substrates. Bioaccumulation from ferric hydroxide was not observed at 70 and 140 mg/kg, while the clams started to absorb Cd at 140 mg/kg from organic matter and the bioaccumulation rate was faster than that from ferric hydroxide. Within 28 d, accumulation of Cd from organic matter appeared to reach a steady state after rising to a certain level, while absorption from ferric hydroxide appeared to follow a linear profile. The findings have implications about the assimilation of trace metals from sediments by benthic animals.