Water Environment Research, ( ISI ), Volume (89), No (6), Year (2017-6) , Pages (519-526)

Title : ( Impact of Bioreduction on Remobilization of Adsorbed Cadmium on Iron Minerals in Anoxic Condition )

Authors: Nasrin Ghorbanzadeh , Amir Lakzian , akram halajnia , Ui-Kyu Choi , Ki-Hyun Kim , Jong-Oh Kim , Mayur Kurade , Byong-Hun Jeon ,

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Abstract

The impact of bioreduction on the remobilization of adsorbed cadmium Cd(II) on minerals, including hematite, goethite, and two iron(III)-rich clay minerals nontronites (NAU-1 and NAU-2) under anoxic conditions was investigated. Langmuir isotherm equation better described the sorption of Cd(II) onto the all minerals. The maximum adsorption capacity was 6.2, 18.1, 3.6, and 4 mg g-1 for hematite, goethite, NAU-1 and NAU-2, respectively. The desorption of Cd(II) was due to the production of Fe(II) as a result of bioreduction of structural Fe(III) in the minerals by Shewanella putrefaciens. The bioreduction of Cd(II)-loaded Fe(III) minerals was negligible during the initial 5 days followed by a rapid increase up to 20 days. The amount of Cd(II) in solution phase at the end of 30 days increased up to 0.07 mmol L-1 for hematite, NAU-1, and NAU-2 and 0.02 mmol L-1 for goethite. The X-ray diffraction study showed negligible changes in bioreduced minerals phases.

Keywords

, adsorption, bioreduction, clay minerals, Shewanella putrefaciens, remobilization
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@article{paperid:1063206,
author = {Nasrin Ghorbanzadeh and Lakzian, Amir and Halajnia, Akram and Ui-Kyu Choi and Ki-Hyun Kim and Jong-Oh Kim and Mayur Kurade and Byong-Hun Jeon},
title = {Impact of Bioreduction on Remobilization of Adsorbed Cadmium on Iron Minerals in Anoxic Condition},
journal = {Water Environment Research},
year = {2017},
volume = {89},
number = {6},
month = {June},
issn = {1061-4303},
pages = {519--526},
numpages = {7},
keywords = {adsorption; bioreduction; clay minerals; Shewanella putrefaciens; remobilization},
}

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%0 Journal Article
%T Impact of Bioreduction on Remobilization of Adsorbed Cadmium on Iron Minerals in Anoxic Condition
%A Nasrin Ghorbanzadeh
%A Lakzian, Amir
%A Halajnia, Akram
%A Ui-Kyu Choi
%A Ki-Hyun Kim
%A Jong-Oh Kim
%A Mayur Kurade
%A Byong-Hun Jeon
%J Water Environment Research
%@ 1061-4303
%D 2017

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