Impact of Bioreduction on Remobilization of Adsorbed Cadmium on Iron Minerals in Anoxic Condition. (1st June 2017)

• Record Type: Journal Article
• Authors: Ghorbanzadeh, Nasrin; Lakzian, Amir; Halajnia, Akram; Choi, Ui‐Kyu; Kim, Ki‐Hyun; Kim, Jong‐Oh; Kurade, Mayur; Jeon, Byong‐Hun
• Is Part Of: Water environment research. Volume 89:Number 6(2017)
• Page Start: 519
• Page End: 526
• Publication Date: 2017-06-01
• Subjects: adsorption -- bioreduction -- clay minerals -- Shewanella putrefaciens -- remobilization; Water quality management -- Periodicals; Water -- Purification -- Periodicals; Water -- Pollution -- Periodicals; Water -- Pollution; Water -- Purification; Water quality management; Sewage; Water Pollution; Periodicals; Electronic journals; Periodicals; 628.16
• DOI: 10.2175/106143017X14902968254449
• Languages: English
• ISSNs: 1061-4303

Abstract

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.