Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/987
Title: Metal Biouptake by Actively Growing Cells of Metal-Tolerant Bacterial Strains
Authors: Oyetibo, G.O
Ilori, M.O
Obayori, O.S
Amund, O.O
Keywords: Biouptake
Bioaccumulation
Detoxification
Heavy Metal
Issue Date: Aug-2015
Publisher: Springer International Publishing
Citation: Oyetibo, G.O [Et...al] Metal Biouptake by Actively Growing Cells of Metal-Tolerant Bacterial Strains. Environmental Monitoring and Assessment, Volume 187 (8).
Abstract: Metal uptake potentials of Pseudomonas aeruginosa CA207Ni, Burkholderia cepacia CA96Co, Rhodococcus sp. AL03Ni, and Corynebacterium kutscheri FL108Hg were studied to determine their competence in detoxification of toxic metals during growth. Metabolism-dependent metal biouptake of the bacteria revealed appreciable uptake of the metals (57– 61, 10–30, 23–60, and 10–16 mg g dw−1 of Ni2+, Cr6+, Co2+, and Cd2+, respectively) from medium, after initial drop in pH, without lag phase. The bacteria exhibited 95–100 % removal efficiency for the metals from aqueous medium as 21 (±0.8)–84 (±2.0) concentration factors of the metals were transported into the bacterial systems. Passive adsorption onto the cell surfaces occurred within 2-h contact, and afterwards, there was continuous accumulation for 12 days. Biosorption data of the bacteria were only fitted into Langmuir isotherm model when strains AL96Co, CA207Ni, and AL03Ni interacted with Ni2+, achieving maximum uptake of 9.87, 2.72, and 2.69 mg g dw−1, respectively. This study established that the actively growing bacterial strains displayed, at least, 97.0 % (±1.5) continuous active removals of metals upon adsorption. The bacteria would be good candidates for designing bioreactor useful in the detoxification campaign of heavy metal-polluted systems.
Description: To access the full text of this article, kindly contact the University Librarian- Dr. Olukemi Fadehan via the administrators: Dr. Yetunde Zaid (yzaid@unilag.edu.ng) or Dr. Christopher Okiki (cokiki@unilag.edu.ng) of the University of Lagos Library.
URI: http://link.springer.com/article/10.1007%2Fs10661-015-4731-z
http://www.ncbi.nlm.nih.gov/pubmed/26209420
http://hdl.handle.net/123456789/987
ISSN: 0167-6369
Appears in Collections:Staff publications

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