Speciation and toxicity of arsenic in mining-affected lake sediments in the Quinsam watershed, British Columbia

Maeve M. Moriarty, Vivian W.-M. Lai, Iris Koch, Longpeng Cui, Chris Combs, Eva M. Krupp, Jorg Feldmann, William R. Cullen, Kenneth J. Reimer

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Anthropogenic arsenic inputs into fresh water lakes in the Quinsam watershed, British Columbia, were probed by using multiple methods of inquiry including sediment coring combined with Pb dating, a principal components analysis of elemental composition of sediments, arsenic speciation, bioaccessibility, and toxicity testing. The quantification of arsenic inputs from anthropogenic sources was not trivial because a variety of processes redistribute the element throughout lakes. However, elevated arsenic and sulfate concentrations in Long Lake, a lake that receives arsenic from a seep, suggest that this lake is influenced by mine operations. X-ray absorption near edge structure (XANES) spectra reveal similar arsenic speciation for all sediments within the studied lakes. Bioaccessibility tests, which in this study were used to approximate the solubility and availability of arsenic to benthic organisms, indicate moderate bioaccessibility of arsenic in sediments (7.9-35%). Toxicity testing indicates that not all benthic organisms should be used for evaluating arsenic toxicity, and suggests that the amphipod, Corophium volutator, shows promise as a candidate for widespread use for arsenic sediment toxicity testing.
Original languageEnglish
Pages (from-to)90-99
Number of pages10
JournalScience of the Total Environment
Volume466-467
Issue number2
Early online date27 Jul 2013
DOIs
Publication statusPublished - 1 Jan 2014

Fingerprint

Arsenic
Watersheds
Toxicity
Lakes
lacustrine deposit
arsenic
Sediments
watershed
toxicity
lake
sediment
Testing
X ray absorption
anthropogenic source
amphipod
Principal component analysis
lake water
Sulfates
principal component analysis
solubility

Keywords

  • sediment
  • arsenic
  • coal mining
  • toxicity testing
  • XANES
  • bioaccessibility

Cite this

Speciation and toxicity of arsenic in mining-affected lake sediments in the Quinsam watershed, British Columbia. / Moriarty, Maeve M.; Lai, Vivian W.-M.; Koch, Iris; Cui, Longpeng; Combs, Chris; Krupp, Eva M.; Feldmann, Jorg; Cullen, William R.; Reimer, Kenneth J.

In: Science of the Total Environment, Vol. 466-467, No. 2, 01.01.2014, p. 90-99.

Research output: Contribution to journalArticle

Moriarty, Maeve M. ; Lai, Vivian W.-M. ; Koch, Iris ; Cui, Longpeng ; Combs, Chris ; Krupp, Eva M. ; Feldmann, Jorg ; Cullen, William R. ; Reimer, Kenneth J. / Speciation and toxicity of arsenic in mining-affected lake sediments in the Quinsam watershed, British Columbia. In: Science of the Total Environment. 2014 ; Vol. 466-467, No. 2. pp. 90-99.
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