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Response of Bacterial Biosorbents to Chemical Treatment as Influenced by Cell Membrane Structure and Impact on the Adsorption Behaviour of Dyes


Affiliations
1 Department of Biotechnology, University of Johannesburg, Doornfontein, Johannesburg, South Africa
2 School of Chemical and Minerals Engineering, North-West University, South Africa
3 Department of Applied Chemistry, University of Johannesburg, Doornfontein, Johannesburg, South Africa
 

The impact of cell membrane structure and adsorption capacity of dyes due to chemical treatment on Gram-positive and Gram-negative bacteria was studied. The adsorption was found to occur through a chemisorption mechanism. The adsorption capacity of treated bacteria was higher (68.49–161.29 mg/g) than untreated bacteria (9.37–29.11 mg/g) during the removal of methylene blue. Furthermore, the treatment allowed bacteria to adsorb methyl orange, which was not removed by untreated bacteria. The applied chemical treatment is therefore influenced by the cell membrane structure and could be considered to improve the adsorption capacity of bacteria for the removal of dyes from polluted water.

Keywords

Adsorption Affinity, Bacteria, Bioremediation, Chemical Treatment, Dyes, Water Pollution.
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  • Response of Bacterial Biosorbents to Chemical Treatment as Influenced by Cell Membrane Structure and Impact on the Adsorption Behaviour of Dyes

Abstract Views: 262  |  PDF Views: 93

Authors

Lwandle P. Simelane
Department of Biotechnology, University of Johannesburg, Doornfontein, Johannesburg, South Africa
Fosso-Kankeu Elvis
School of Chemical and Minerals Engineering, North-West University, South Africa
Patrick Njobeh
Department of Biotechnology, University of Johannesburg, Doornfontein, Johannesburg, South Africa
Sadanand Pandey
Department of Applied Chemistry, University of Johannesburg, Doornfontein, Johannesburg, South Africa

Abstract


The impact of cell membrane structure and adsorption capacity of dyes due to chemical treatment on Gram-positive and Gram-negative bacteria was studied. The adsorption was found to occur through a chemisorption mechanism. The adsorption capacity of treated bacteria was higher (68.49–161.29 mg/g) than untreated bacteria (9.37–29.11 mg/g) during the removal of methylene blue. Furthermore, the treatment allowed bacteria to adsorb methyl orange, which was not removed by untreated bacteria. The applied chemical treatment is therefore influenced by the cell membrane structure and could be considered to improve the adsorption capacity of bacteria for the removal of dyes from polluted water.

Keywords


Adsorption Affinity, Bacteria, Bioremediation, Chemical Treatment, Dyes, Water Pollution.

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DOI: https://doi.org/10.18520/cs%2Fv114%2Fi04%2F826-834