title: The effects of mariculture activities on the adsorption/desorption and chemical fractionations of mercury on sediments.
abstract: 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.
authors.affiliation: School of Environmental and Resource Sciences, Zhejiang Agriculture and Forestry University, Linan, PR China.
authors.forename: Peng
authors.initials: P
authors.lastname: Liang
authors.forename: Sheng-Chun
authors.initials: SC
authors.lastname: Wu
authors.forename: Yi-Chun
authors.initials: YC
authors.lastname: Li
authors.forename: Hong-Bo
authors.initials: HB
authors.lastname: Li
authors.forename: Guang-bin
authors.initials: GB
authors.lastname: Yu
authors.forename: Shen
authors.initials: S
authors.lastname: Yu
authors.forename: Ming H
authors.initials: MH
authors.lastname: Wong
mesh_terms: D000327:Adsorption; D017756:Aquaculture; D005591:Chemical Fractionation; D002681:China; D004784:Environmental Monitoring; D019015:Geologic Sediments / Q000737:chemistry*; D008628:Mercury / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000737:chemistry*
chemical_list: D014874:Water Pollutants, Chemical; D008628:Mercury