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

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Abstract

The aims of the present study were to investigate the effects of mariculture activities on inorganic mercury (Hg2+) adsorption/desorption on sediments and the distributions of newly adsorbed Hg2+ on different chemical fractionations. The adsorption amount and binding energy of Hg2+ 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 Hg2+ and organic matter (OM), which derived from unconsumed fish feed and fish metabolites. The reducible Hg2+ 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 Hg2+ bound to them. On the contrary, the residual Hg2+ was significantly higher (p<0.01) in MS than RS, which suggests that newly adsorbed Hg2+ was more stable in MS than RS. Copyright © 2012 Elsevier Ltd. All rights reserved.

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

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mariculture
Fractionation
desorption
mercury
Desorption
fractionation
Sediments
adsorption
Adsorption
sediments
sediment
Fish
chemical
effect
hydroxides
fish
Metabolites
Complexation
Binding energy
complexation

Citation

Liang, P., Wu, S.-C., Li, Y.-C., Li, H.-B., Yu, G.-B., Yu, S., & Wong, M. H. (2012). The effects of mariculture activities on the adsorption/desorption and chemical fractionations of mercury on sediments. Marine Pollution Bulletin, 64(4), 836-843. doi: 10.1016/j.marpolbul.2012.01.027

Keywords

  • Mercury
  • Adsorption
  • Sediment
  • BCR
  • Aquaculture