Removal of microcystin-LR from aqueous solutions using % burn-off activated carbon of waste wood material
The activated carbon (AC), prepared at different burn-off rates, showed a high uptake of methylene blue. At 93% burn-off, methylene blue uptake was 620 mg/g. Adsorption capacity of microcystin-LR onto rubber wood AC was investigated in a batch system by considering the effects of various parameters...
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my.unimas.ir.296672020-05-11T04:11:17Z http://ir.unimas.my/id/eprint/29667/ Removal of microcystin-LR from aqueous solutions using % burn-off activated carbon of waste wood material Bhawani, Showkat Ahmad Sufia, Hena Isaam, A. M. Ismail, N. Ahmad, A. QD Chemistry The activated carbon (AC), prepared at different burn-off rates, showed a high uptake of methylene blue. At 93% burn-off, methylene blue uptake was 620 mg/g. Adsorption capacity of microcystin-LR onto rubber wood AC was investigated in a batch system by considering the effects of various parameters like contact time, initial concentration, pH and temperature. Microcystin-LR removal is pH dependent and found to be highest at pH 2.5. Increases in adsorption capacity with increase in temperature indicate that the adsorption reaction is endothermic. Based on this study, the thermodynamic parameters like standard Gibb’s free energy (ΔGW ), standard enthalpy (ΔHW ) and standard entropy (ΔSW ) were evaluated. A pseudo second order model was found to explain the kinetics of microcystin-LR adsorption most effectively. The rate of intraparticle diffusion was also evaluated. The Langmuir and Freundlich isotherms were used to describe the adsorption equilibrium studies of rubber wood AC at different temperatures. The Langmuir isotherm shows better fit than Freundlich isotherms in the temperature range studied. The results show that the rubber wood AC can be efficiently used for the removal of microcystin-LR from water. In order to investigate the possibility of regeneration and reuse of exhausted adsorbent, desorption studies were also performed. IWA Publishing 2014 E-Article PeerReviewed text en http://ir.unimas.my/id/eprint/29667/1/1%20-%20Copy.pdf Bhawani, Showkat Ahmad and Sufia, Hena and Isaam, A. M. and Ismail, N. and Ahmad, A. (2014) Removal of microcystin-LR from aqueous solutions using % burn-off activated carbon of waste wood material. Journal of Water Supply: Research and Technology-Aqua, 63 (5). pp. 332-341. ISSN 1605-3974 https://iwaponline.com/aqua/article/63/5/332/29215/Removal-of-microcystin-LR-from-aqueous-solutions DOI:org/10.2166/aqua.2013.256 |
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QD Chemistry Bhawani, Showkat Ahmad Sufia, Hena Isaam, A. M. Ismail, N. Ahmad, A. Removal of microcystin-LR from aqueous solutions using % burn-off activated carbon of waste wood material |
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The activated carbon (AC), prepared at different burn-off rates, showed a high uptake of methylene blue. At 93% burn-off, methylene blue uptake was 620 mg/g. Adsorption capacity of microcystin-LR onto rubber wood AC was investigated in a batch system by considering the effects of various parameters like contact time, initial concentration, pH and temperature. Microcystin-LR removal is pH dependent and found to be highest at pH 2.5. Increases in adsorption capacity with increase in
temperature indicate that the adsorption reaction is endothermic. Based on this study, the thermodynamic parameters like standard Gibb’s free energy (ΔGW
), standard enthalpy (ΔHW ) and standard entropy (ΔSW
) were evaluated. A pseudo second order model was found to explain the kinetics of microcystin-LR adsorption most effectively. The rate of intraparticle diffusion was also
evaluated. The Langmuir and Freundlich isotherms were used to describe the adsorption equilibrium studies of rubber wood AC at different temperatures. The Langmuir isotherm shows better fit than Freundlich isotherms in the temperature range studied. The results show that the rubber wood AC can be efficiently used for the removal of microcystin-LR from water. In order to investigate the
possibility of regeneration and reuse of exhausted adsorbent, desorption studies were also performed. |
format |
E-Article |
author |
Bhawani, Showkat Ahmad Sufia, Hena Isaam, A. M. Ismail, N. Ahmad, A. |
author_facet |
Bhawani, Showkat Ahmad Sufia, Hena Isaam, A. M. Ismail, N. Ahmad, A. |
author_sort |
Bhawani, Showkat Ahmad |
title |
Removal of microcystin-LR from aqueous solutions using
% burn-off activated carbon of waste wood material |
title_short |
Removal of microcystin-LR from aqueous solutions using
% burn-off activated carbon of waste wood material |
title_full |
Removal of microcystin-LR from aqueous solutions using
% burn-off activated carbon of waste wood material |
title_fullStr |
Removal of microcystin-LR from aqueous solutions using
% burn-off activated carbon of waste wood material |
title_full_unstemmed |
Removal of microcystin-LR from aqueous solutions using
% burn-off activated carbon of waste wood material |
title_sort |
removal of microcystin-lr from aqueous solutions using
% burn-off activated carbon of waste wood material |
publisher |
IWA Publishing |
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2014 |
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http://ir.unimas.my/id/eprint/29667/1/1%20-%20Copy.pdf http://ir.unimas.my/id/eprint/29667/ https://iwaponline.com/aqua/article/63/5/332/29215/Removal-of-microcystin-LR-from-aqueous-solutions |
_version_ |
1669010446616625152 |
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13.18916 |