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

Peng Liang, Sheng Chun Wu, Yi Chun Li, Hong Bo Li, Guang bin Yu, Shen Yu*, Ming Hung WONG

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)836-843
Number of pages8
JournalMarine Pollution Bulletin
Volume64
Issue number4
DOIs
Publication statusPublished - Apr 2012

Scopus Subject Areas

  • Oceanography
  • Aquatic Science
  • Pollution

User-Defined Keywords

  • Adsorption
  • Aquaculture
  • BCR
  • Mercury
  • Sediment

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