The effects of mariculture activities on the adsorption/desorption and chemical fractionations of mercury on sediments.

The aims of the present study were to investigate the effects of mariculture activities on inorganic mercury (Hg(2+)) adsorption/desorption on sediments and the distributions of newly adsorbed Hg(2+) on different chemical fractionations. The adsorption amount and binding energy of Hg(2+) on mariculture sediment (MS) were significantly higher (p<0.05) than reference sediment (RS). This may be explained by the strong complexation role that exists between Hg(2+) and organic matter (OM), which derived from unconsumed fish feed and fish metabolites. The reducible Hg(2+) in MS was significantly lower (p<0.01) than RS, which may have been caused by the decreasing amount of iron and manganese hydroxide in MS, lead to the decrease of Hg(2+) bound to them. On the contrary, the residual Hg(2+) was significantly higher (p<0.01) in MS than RS, which suggests that newly adsorbed Hg(2+) was more stable in MS than RS. Copyright © 2012 Elsevier Ltd. All rights reserved.

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Peng Liang, Sheng-Chun Wu, Yi-Chun Li, Hong-Bo Li, Guang-bin Yu, Shen Yu, Ming H Wong. The effects of mariculture activities on the adsorption/desorption and chemical fractionations of mercury on sediments. Marine pollution bulletin. 2012 Apr;64(4):836-43

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PMID: 22341553

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