TY - GEN
T1 - Response of bacterial bioreporters to surface-bound arsenic
AU - Van Genuchten, C. M.
AU - Finger, A.
AU - Van Der Meer, J.
AU - Peña, J.
N1 - Publisher Copyright:
© 2016 Taylor & Francis Group, London.
PY - 2016
Y1 - 2016
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85016989389&partnerID=8YFLogxK
U2 - 10.1201/b20466-124
DO - 10.1201/b20466-124
M3 - Conference article in proceedings
AN - SCOPUS:85016989389
SN - 9781138029415
T3 - Arsenic Research and Global Sustainability - Proceedings of the 6th International Congress on Arsenic in the Environment, AS 2016
SP - 254
EP - 258
BT - Arsenic Research and Global Sustainability - Proceedings of the 6th International Congress on Arsenic in the Environment, AS 2016
A2 - Bhattacharya, Prosun
A2 - Jacks, Gunnar
A2 - Bundschuh, Jochen
A2 - Bhattacharya, Prosun
A2 - Vahter, Marie
A2 - Jarsjo, Jerker
A2 - Jarsjo, Jerker
A2 - Kumpiene, Jurate
A2 - Ahmad, Arslan
A2 - Sparrenbom, Charlotte
A2 - Donselaar, Marinus Eric
A2 - Bundschuh, Jochen
A2 - Naidu, Ravi
A2 - Naidu, Ravi
PB - CRC Press/Balkema
T2 - 6th International Congress on Arsenic in the Environment, AS 2016
Y2 - 19 June 2016 through 23 June 2016
ER -