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Influence of arsenate adsorption and microbe-mineral interaction on microbial arsenate reduction kinetics

English title Influence of arsenate adsorption and microbe-mineral interaction on microbial arsenate reduction kinetics
Applicant Huang Jen-How
Number 142232
Funding scheme Ambizione
Research institution Institut für Umweltgeowissenschaften Universität Basel
Institution of higher education University of Basel - BS
Main discipline Pedology
Start/End 01.09.2012 - 31.08.2014
Approved amount 390'437.00
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All Disciplines (2)

Discipline
Pedology
Geochemistry

Keywords (6)

Microbial reduction Kinetics; Arsenate and arsenite; Adsorption and desorption; Fe and Al hydroxide; Microbe-mineral interaction; Microbial extracellular polymeric substances

Lay Summary (English)

Lead
Lay summary

Arsenic in drinking water and soils poses a serious threat to millions of people worldwide due to its chronic toxicity. The oxidized arsenate (As(V)) is less mobile and toxic than the reduced arsenite (As(III)). The reduction of As(V) to As(III) in most environmental systems is driven by microorganisms, but arsenic sorption at the mineral-water interface may strongly influence the rates of this transformation. Understanding the influence of mineral surfaces on the kinetics of microbial As(V) reduction is thus essential to better assess the arsenic mobility and toxicity in soils, sediments, and natural waters. In this project, incubation experiments will be performed to study the influence of As(V) sorption on Fe and Al (hydr)oxide surfaces on the kinetics of the microbial As(V) reduction. The effects of microbe-mineral surface interaction, microbial activities and competition between As(V) and Fe(III) reduction will be studied in detail. The experiments are carried out with arsenic reducing bacteria to focus on the effect of arsenic sorption on As(V) reduction and with iron and arsenic reducing bacteria to study the competition between As(V) and Fe(III) reduction. The biogeochemical fate of arsenic at the water-solid interface is considered parallel from the aspects of microbial activities, chemical speciation and physiochemical processes. The knowledge generated in this study provides new insight into an important environmental process and is needed for the implementation of powerful strategies to cope with the problem of large-scale arsenic release from sediments into water worldwide.

Direct link to Lay Summary Last update: 21.02.2013

Responsible applicant and co-applicants

Employees

Publications

Publication
Arsenic trophodynamics along the food chains/ webs of different ecosystems: a review
Huang Jen-How (2016), Arsenic trophodynamics along the food chains/ webs of different ecosystems: a review, in Chemistry and Ecology, 32(9), 803-828.
An accurate fast screening for total and inorganic arsenic in rice grain using hydride generation atomic fluorescence spectrometry (HG-AFS).
Chen B Corns WT Stockwell PB Huang J-H (2014), An accurate fast screening for total and inorganic arsenic in rice grain using hydride generation atomic fluorescence spectrometry (HG-AFS)., in Analytical Method, 6, 7554-7558.
Impact of microorganisms on arsenic biogeochemistry: A review.
Huang J-H (2014), Impact of microorganisms on arsenic biogeochemistry: A review., in Water Air & Soil Pollution, 225, 1548.
Readily available phosphorous and nitrogen counteract for arsenic uptake in wheat (Triticum aestivum L.).
Brackhage C Huang J-H Schaller J Elzinga EJ Dudel EG (2014), Readily available phosphorous and nitrogen counteract for arsenic uptake in wheat (Triticum aestivum L.)., in Scientific Reports, 4, 4944.
An automatic cryotrapping and cryfocussing system for the parallel ICP-MS and EI-MS detection of volatile arsenic compounds in gaseous samples.
Ilgen Gunter Huang Jen-How (2013), An automatic cryotrapping and cryfocussing system for the parallel ICP-MS and EI-MS detection of volatile arsenic compounds in gaseous samples., in Journal of Analytical Atomic , 28, 293-300.

Collaboration

Group / person Country
Types of collaboration
NWFH Schweiz, Ecopreneurship Switzerland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Research Infrastructure
BioZentrum Basel Switzerland (Europe)
- Research Infrastructure

Scientific events

Active participation

Title Type of contribution Title of article or contribution Date Place Persons involved
12th European Biological Inorganic Chemistry Conference Poster A novel sequential extraction method for the fractionation of vanadium in mineral soils. 24.08.2014 Zürich, Switzerland Huang Jen-How;
European Geosciences Union General Assembly Poster Characterising microbial reduction of arsenate sorbed to ferrihydrite and its concurrence with iron reduction and the consequent impact on arsenic mobilisation. 27.04.2014 Wien, Austria Huang Jen-How;
European Geosciences Union General Assembly Talk given at a conference Biogenic arsenic volatilisation from an acidic wetland soil 27.04.2014 Wien, Austria Huang Jen-How;
5th Swiss Microbial Ecology Talk given at a conference Characterizing iron and arsenate reduction of arsenate-reacted ferrihdyrite by Shewanella putrefaciens strain CN-32 04.02.2013 Murten, Switzerland Huang Jen-How;


Associated projects

Number Title Start Funding scheme
122212 Influence of arsenate adsorption on iron and aluminium hydroxide surfaces on microbial arsenate reduction kinetics 01.09.2009 Ambizione

Abstract

Arsenic in drinking water and soils poses a serious threat to millions of people worldwide due to its chronic toxicity. The oxidized arsenate (As(V)) is less mobile and toxic than the reduced arsenite (As(III)). The reduction of As(V) to As(III) in most environmental systems is driven by microorganisms, but arsenic sorption at the mineral-water interface may strongly influence the rates of this transformation. Understanding the influence of mineral surfaces on the kinetics of microbial As(V) reduction is thus essential to better assess the arsenic mobility and toxicity in soils, sediments, and natural waters. In this project, microbe-mineral-arsenic interaction will be investigated with batch incubations and IR based technique. Incubation experiments will be performed to study the kinetics of the microbial As(V) reduction in the presence of Fe and Al (hydr)oxide. The effects of microbial activities and competition between As(V) and Fe(III) reduction will be studied in detail. The experiments are carried out with arsenic reducing bacteria to focus on the effect of arsenic sorption on As(V) reduction and with iron and arsenic reducing bacteria to study the competition between As(V) and Fe(III) reduction. The biogeochemical fate of arsenic at the water-solid interface is considered parallel from the aspects of microbial activities, chemical speciation and physiochemical processes. The knowledge generated in this study provides new insight into an important environmental process and is needed for the implementation of powerful strategies to cope with the problem of large-scale arsenic release from sediments into water worldwide.The applicant has excellent research skills and is highly productive. He maintains very active national and international collaborations. The extension of Ambizione Fellowship at University of Basel will provide the applicant new input required for his long-term goal. The Institute of Environmental Geosciences will provide him promising opportunities to build up his own small group by supervising master students and to complete Habilitation.
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