NDLI: Microbially facilitated incorporation of As(III) into bioreduced Fe-(hydr)oxide minerals

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Journal of the Korean Society for Applied Biological Chemistry : Volume 56

Journal of the Korean Society for Applied Biological Chemistry : Volume 55

Journal of the Korean Society for Applied Biological Chemistry : Volume 54

Journal of the Korean Society for Applied Biological Chemistry : Volume 53

Journal of the Korean Society for Applied Biological Chemistry : Volume 52

Microbially facilitated incorporation of As(III) into bioreduced Fe-(hydr)oxide minerals

Content Provider	Springer Nature Link
Author	Hur, Hor Gil Lee, Ji Hoon
Copyright Year	2014
Abstract	Ferric (oxyhydr)oxide minerals are widespread in the (sub)surface soils such as in agricultural fields, and arsenic compounds have been used widely in the production of pesticides, herbicides, and insecticides, which have caused potential As contaminations in the (sub)surface soils including Fe-(oxyhydr)oxides. Because one of the potential relationships between Fe-(oxyhydr)oxides and As was suggested above, scientists have been motivated to investigate the relationship between Fe-(oxyhydr)oxides and As. In the present study, a dissimilatory Fe(III)-reducing bacterium, Shewanella sp. HN-41 was employed to elucidate effect of microbial Fe(III) reduction on the relationship between Fe-(oxyhydr)oxides and As, and incubated with lactate and synthetic Fe(III)-oxyhydroxide as the electron donor and acceptor, respectively, in the presence of As(III). For comparison, abiotic incubations were performed under the same condition except for addition of the bacterial cells. By sequential chemical extraction of the incubation products, As(III) was determined to be incorporated into the bioreduced minerals at higher concentrations (∼14.4% of the total extracted As) than in the abiotic products (∼10.2%) that were aged for the same duration as the microbial incubation. The results of this study emphasized that bacterial Fe(III)-reduction of the initial synthetic Fe-oxyhydroxide, akaganéite, induced more As(III) incorporation into the structures of the final product minerals than the abiotic transformation of the initial As(III)-adsorbed Fe-oxyhydroxide in the control incubations. Thus, microbial Fe(III)-reduction-mediated incorporation of As(III) into biotransformed Fe-(oxy)(hydr)oxide minerals could be suggested as one of potential strategies for arsenic immobilization in anoxic soils and groundwater.
Starting Page	123
Ending Page	128
Page Count	6
File Format	PDF
ISSN	17382203
Journal	Journal of the Korean Society for Applied Biological Chemistry
Volume Number	57
Issue Number	1
e-ISSN	2234344X
Language	English
Publisher	The Korean Society for Applied Biological Chemistry
Publisher Date	2014-02-28
Publisher Place	Seoul
Access Restriction	Subscribed
Subject Keyword	Fe(III) reduction arsenite incorporation Applied Microbiology Biological Techniques Shewanella Bioorganic Chemistry Fe-oxyhydroxide
Content Type	Text
Resource Type	Article
Subject	Organic Chemistry Biochemistry, Genetics and Molecular Biology

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