Impact of Bioreduction on Remobilization of Adsorbed Cadmium on Iron Minerals in Anoxic Condition
- Title
- Impact of Bioreduction on Remobilization of Adsorbed Cadmium on Iron Minerals in Anoxic Condition
- Author
- 김기현
- Keywords
- adsorption; bioreduction; clay minerals; Shewanella putrefaciens; remobilization
- Issue Date
- 2017-06
- Publisher
- WATER ENVIRONMENT FEDERATION
- Citation
- WATER ENVIRONMENT RESEARCH, v. 89, no. 6, page. 519-526
- 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.
- URI
- https://onlinelibrary.wiley.com/doi/abs/10.2175/106143017X14902968254449https://repository.hanyang.ac.kr/handle/20.500.11754/114659
- ISSN
- 1061-4303; 1554-7531
- DOI
- 10.2175/106143017X14902968254449
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > CIVIL AND ENVIRONMENTAL ENGINEERING(건설환경공학과) > Articles
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