Response of bacterial bioreporters to surface-bound arsenic

C. M. Van Genuchten, A. Finger, J. Van Der Meer, J. Peña

Publikation: Bidrag til bog/rapport/konferenceproceedingsKonferenceartikel i proceedingspeer review

Abstrakt

Previous work shows that the response of bacterial bioreporters to aqueous Arsenic (As) is altered by solution chemistry. However, the influence of solid phase Fe precipitates on the detection of As by these engineered microorganisms is not understood. In this study, we applied bacterial bioreporters to assess the bioavailability of As(V) bound to the surface of a suite of Fe(III) (oxyhydr)oxide minerals. We found that As(V) bound to the surface of crystalline goethite (As:Fe = 1 mol%) was not detected by the bioreporters. By contrast, substantial fractions of As(V) (35–50%) adsorbed to nanocrystalline two-line ferrihydrite (As:Fe = 1–6 mol%) were detected by the bacteria, which suggests that structural properties of the solid phase play a key role in the detection of surface-bound As(V) by bioreporters. Our findings stress the importance of preventing the oxidation of Fe(II), which is common in As-contaminated aquifers, to ensure accurate As measurements when applying bioreporters in the field.

OriginalsprogEngelsk
TitelArsenic Research and Global Sustainability - Proceedings of the 6th International Congress on Arsenic in the Environment, AS 2016
RedaktørerProsun Bhattacharya, Gunnar Jacks, Jochen Bundschuh, Prosun Bhattacharya, Marie Vahter, Jerker Jarsjo, Jerker Jarsjo, Jurate Kumpiene, Arslan Ahmad, Charlotte Sparrenbom, Marinus Eric Donselaar, Jochen Bundschuh, Ravi Naidu, Ravi Naidu
ForlagCRC Press/Balkema
Sider254-258
Antal sider5
ISBN (Trykt)9781138029415
DOI
StatusUdgivet - 2016
Begivenhed6th International Congress on Arsenic in the Environment, AS 2016 - Stockholm, Sverige
Varighed: 19 jun. 201623 jun. 2016

Publikationsserier

NavnArsenic Research and Global Sustainability - Proceedings of the 6th International Congress on Arsenic in the Environment, AS 2016

Konference

Konference6th International Congress on Arsenic in the Environment, AS 2016
Land/OmrådeSverige
ByStockholm
Periode19/06/1623/06/16

Programområde

  • Programområde 2: Vandressourcer

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