Mercury species of sediment and fish in freshwater fish ponds around the Pearl River Delta, PR China : Human health risk assessment

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

46 Scopus Citations
View graph of relations

Author(s)

  • Dingding Shao
  • Peng Liang
  • Yuan Kang
  • Hongsheng Wang
  • Zhang Cheng
  • Shengchun Wu
  • Jianbo Shi
  • Samuel Chun Lap Lo
  • Ming H. Wong

Detail(s)

Original languageEnglish
Pages (from-to)443-448
Journal / PublicationChemosphere
Volume83
Issue number4
Online published26 Jan 2011
Publication statusPublished - Apr 2011
Externally publishedYes

Abstract

This study investigated total mercury (THg) and methylmercury (MeHg) concentrations in five species of freshwater fish and their associated fish pond sediments collected from 18 freshwater fish ponds around the Pearl River Delta (PRD). The concentrations of THg and MeHg in fish pond surface sediments were 33.1-386 ng g-1 dry wt and 0.18-1.25 ng g-1 dry wt, respectively. The age of ponds affected the surface sediment MeHg concentration. The vertical distribution of MeHg in sediment cores showed that MeHg concentrations decreased with increasing depth in the top 10cm. In addition, a significant correlation was observed between %MeHg and DNA from Desulfovibrionacaea or Desulfobulbus (< 0.05) in sediment cores. Concentrations of THg and MeHg in fish muscles ranged from 7.43-76.7 to 5.93-76.1 ng g-1 wet wt, respectively, with significant linear relationships (r = 0.97, p < 0.01, n = 122) observed between THg and MeHg levels in fish. A significant correlation between THg concentrations in fish (herbivorous: r = 0.71, p < 0.05, n = 7; carnivorous: r = 0.77, p < 0.05, n = 11) and corresponding sediments was also obtained. Risk assessment indicated that the consumption of largemouth bass and mandarin fish would result in higher estimated daily intakes (EDIs) of MeHg than reference dose (RfD) for both adults and children. © 2010 Elsevier Ltd.

Research Area(s)

  • Freshwater fish, Mercury, Methylmercury, Risk assessment, Sediment

Citation Format(s)

Mercury species of sediment and fish in freshwater fish ponds around the Pearl River Delta, PR China: Human health risk assessment. / Shao, Dingding; Liang, Peng; Kang, Yuan et al.
In: Chemosphere, Vol. 83, No. 4, 04.2011, p. 443-448.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review