Acute toxicity of thioarsenates to Vibrio fischeri

Environmental Toxicology and Chemistry
Britta Planer-FriedrichDirk Wallschläger

Abstract

Thioarsenic species often are the predominant arsenic species in sulfidic environments, yet little is known about their toxicity. We report to our knowledge the first determination of acute toxicity of mono-, di-, and trithioarsenate to the bioluminescent bacterium Vibrio fischeri, which increases with an increasing number of thio(SH)-groups. Whereas mono- and dithioarsenate are much less toxic (effective analyte concentration causing a 50% decrease in luminescence [EC50], 676 and 158 mg/L, respectively), the toxicity of trithioarsenate (EC50, 14.4 mg/L) is comparable to the toxicities of arsenate and arsenite (EC50, 9.1 and 26.1 mg/L, respectively). The low toxicity of monothioarsenate is remarkable, because it has chemical properties very similar to those of arsenate. In contrast to the toxicities of arsenite and arsenate, the toxicity of thioarsenates increases with exposure time, suggesting a lack of detoxification mechanisms or a conversion of thioarsenic species into arsenic oxyanions after uptake. We determined the acute toxicity of synthetic arsenite solutions with varying sulfide concentration to V. fischeri. Arsenic speciation in these solutions was measured by ion chromatography-inductively coupled plasma-mass spectr...Continue Reading

Citations

May 2, 2014·Environmental Science and Pollution Research International·Sinikka HinrichsenBritta Planer-Friedrich
Apr 8, 2014·Environmental Science and Pollution Research International·David A RubinosMaría Teresa Barral
Feb 18, 2011·Chemosphere·Elke SuessBritta Planer-Friedrich
Apr 21, 2012·Environmental Microbiology·Raoul-Marie CoutureAntoine Danchin
Sep 2, 2009·Mass Spectrometry Reviews·Diane Beauchemin
Oct 17, 2014·FEMS Microbiology Ecology·Christian F EdwardsonJames T Hollibaugh
Jul 17, 2016·Water Research·Maria K UllrichBritta Planer-Friedrich
Nov 9, 2018·Frontiers in Microbiology·Ibtissem Ben FekihCarlos Cervantes
Aug 14, 2009·Environmental Science & Technology·Britta Planer-Friedrich, Dirk Wallschläger

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