Regeneration Potential Of Bentonite Based Thin Coated Adsorbent

Adsorption is one of the widely used method for wastewater treatment since it is cost-effective, eco-friendly and highly efficient in nature. Bentonite based adsorbent coating was introduced to overcome the problem associated with the use of adsorbents in pellet, beads, powder, or other particle for...

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Main Author:	Momina, Momina
Format:	Thesis
Language:	English
Published:	2019
Subjects:	T Technology TP155-156 Chemical engineering
Online Access:	http://eprints.usm.my/48562/1/Regeneration%20Potential%20Of%20Bentonite%20Based%20Thin%20Coated%20Adsorbent.pdf
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spelling	my-usm-ep.485622021-11-17T03:42:12Z Regeneration Potential Of Bentonite Based Thin Coated Adsorbent 2019-04-01 Momina, Momina T Technology TP155-156 Chemical engineering Adsorption is one of the widely used method for wastewater treatment since it is cost-effective, eco-friendly and highly efficient in nature. Bentonite based adsorbent coating was introduced to overcome the problem associated with the use of adsorbents in pellet, beads, powder, or other particle forms. Its adsorption capacity increases due to increase in surface area/weight ratio. It is important to regenerate adsorbent before it is disposed into environment. Therefore, this study is focused on regeneration of bentonite-based coating using three different methods; chemical regeneration, thermal regeneration and combination of thermal and chemical (thermo-chem) regeneration. Chemical regeneration was not found to be suitable for the regeneration of bentonite adsorbent coating with 22% desorption efficiency of MB using ethanol. Rather, thermal effect can loosen the bonds between adsorbate and adsorbent, but unable to completely break the bond between MB and adsorbent coating at 160oC. The thermo-chem method effectively desorbed MB with desorption efficiency of 74 % using HCl after heating adsorbent coating at 160 oC for initial dye concentration of 50 ppm. Also, regeneration study results confirm successive adsorption/desorption of MB on adsorbent coating even after 7th cycle. The characterization of PaintosorpTM before and after desorption of dye has been performed using TGA/DTA, SEM, EDX, BET, PSD and FTIR analysis. Batch desorption study of MB results Sips and Freundlich isotherm model are best fitting which shows that desorption of MB occurs from multilayer adsorbed MB on adsorbent coating. However, kinetic model best fitting with pseudo second order model and confirms that desorption mechanism is due to concentration gradient, solubility and diffusivity of MB. 2019-04 Thesis http://eprints.usm.my/48562/ http://eprints.usm.my/48562/1/Regeneration%20Potential%20Of%20Bentonite%20Based%20Thin%20Coated%20Adsorbent.pdf application/pdf en public masters Universiti Sains Malaysia Pusat Pengajian Kejuruteraan Kimia
institution	Universiti Sains Malaysia
collection	USM Institutional Repository
language	English
topic	T Technology TP155-156 Chemical engineering
spellingShingle	T Technology TP155-156 Chemical engineering Momina, Momina Regeneration Potential Of Bentonite Based Thin Coated Adsorbent
description	Adsorption is one of the widely used method for wastewater treatment since it is cost-effective, eco-friendly and highly efficient in nature. Bentonite based adsorbent coating was introduced to overcome the problem associated with the use of adsorbents in pellet, beads, powder, or other particle forms. Its adsorption capacity increases due to increase in surface area/weight ratio. It is important to regenerate adsorbent before it is disposed into environment. Therefore, this study is focused on regeneration of bentonite-based coating using three different methods; chemical regeneration, thermal regeneration and combination of thermal and chemical (thermo-chem) regeneration. Chemical regeneration was not found to be suitable for the regeneration of bentonite adsorbent coating with 22% desorption efficiency of MB using ethanol. Rather, thermal effect can loosen the bonds between adsorbate and adsorbent, but unable to completely break the bond between MB and adsorbent coating at 160oC. The thermo-chem method effectively desorbed MB with desorption efficiency of 74 % using HCl after heating adsorbent coating at 160 oC for initial dye concentration of 50 ppm. Also, regeneration study results confirm successive adsorption/desorption of MB on adsorbent coating even after 7th cycle. The characterization of PaintosorpTM before and after desorption of dye has been performed using TGA/DTA, SEM, EDX, BET, PSD and FTIR analysis. Batch desorption study of MB results Sips and Freundlich isotherm model are best fitting which shows that desorption of MB occurs from multilayer adsorbed MB on adsorbent coating. However, kinetic model best fitting with pseudo second order model and confirms that desorption mechanism is due to concentration gradient, solubility and diffusivity of MB.
format	Thesis
qualification_level	Master's degree
author	Momina, Momina
author_facet	Momina, Momina
author_sort	Momina, Momina
title	Regeneration Potential Of Bentonite Based Thin Coated Adsorbent
title_short	Regeneration Potential Of Bentonite Based Thin Coated Adsorbent
title_full	Regeneration Potential Of Bentonite Based Thin Coated Adsorbent
title_fullStr	Regeneration Potential Of Bentonite Based Thin Coated Adsorbent
title_full_unstemmed	Regeneration Potential Of Bentonite Based Thin Coated Adsorbent
title_sort	regeneration potential of bentonite based thin coated adsorbent
granting_institution	Universiti Sains Malaysia
granting_department	Pusat Pengajian Kejuruteraan Kimia
publishDate	2019
url	http://eprints.usm.my/48562/1/Regeneration%20Potential%20Of%20Bentonite%20Based%20Thin%20Coated%20Adsorbent.pdf
_version_	1747821947710865408

Regeneration Potential Of Bentonite Based Thin Coated Adsorbent

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