New insights into the chemical forms of extremely high methylmercury in songbird feathers from a contaminated site

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

6 Scopus Citations
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Author(s)

  • Zhidong Xu
  • Kasun S. Abeysinghe
  • Xiaohang Xu
  • Chunhao Gu
  • Longchao Liang
  • Qinhui Lu
  • Yubo Zhang
  • Lirong Zheng
  • Guangle Qiu

Detail(s)

Original languageEnglish
Pages (from-to)803-809
Journal / PublicationChemosphere
Volume225
Online published14 Mar 2019
Publication statusPublished - Jun 2019
Externally publishedYes

Abstract

The chemical forms of mercury (Hg), particularly methylmercury (MeHg), in songbird feathers from an abandoned mining region were analyzed via X-ray absorption near-edge structure analysis (XANES). In feathers, proportions of MeHg as total mercury (75.6–100%) quantified by the XANES were directly comparable to the chemical extraction values (74.1–95.9%). Most of MeHg were bound with cysteine (Cys) and reduced glutathione (GSH), whereas inorganic mercury (IHg) was mainly bound with GSH. These results were consistent with those found in fish muscles and human hairs of both fish consumers and occupational Hg exposure populations. Our study suggested that chemical forms and speciation of Hg were highly dependent on the exposure sources and food consumption, respectively. Bird feathers were able to selectively accumulate MeHg due to their special binding ways. However, detailed mechanisms of Hg accumulation in bird feathers remain to be further elucidated.

Research Area(s)

  • Chemical forms, MeHg, Songbird feathers, Speciation, XANES

Citation Format(s)

New insights into the chemical forms of extremely high methylmercury in songbird feathers from a contaminated site. / Xu, Zhidong; Abeysinghe, Kasun S.; Xu, Xiaohang; Gu, Chunhao; Liang, Longchao; Lu, Qinhui; Zhang, Yubo; Zheng, Lirong; Wang, Wen-Xiong; Qiu, Guangle.

In: Chemosphere, Vol. 225, 06.2019, p. 803-809.

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