Adsorption of rhodamine B by metals chloride -activated castor bean residue carbon

Zinc chloride (ZnCl2) is a well-known pollutant which is toxic to the aquatic organisms. A study of adsorption of rhodamine B was conducted to investigate the performance of metals chloride activated carbon prepared from castor bean residue. Rhodamine B was selected as the model dye due to its high...

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Main Author:	Lee, Lin Zhi
Format:	Thesis
Language:	English
Published:	2016
Subjects:	QD Chemistry
Online Access:	http://eprints.utm.my/id/eprint/78131/1/LeeLinZhiMFChE2016.pdf
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spelling	my-utm-ep.781312018-07-25T07:57:39Z Adsorption of rhodamine B by metals chloride -activated castor bean residue carbon 2016-08 Lee, Lin Zhi QD Chemistry Zinc chloride (ZnCl2) is a well-known pollutant which is toxic to the aquatic organisms. A study of adsorption of rhodamine B was conducted to investigate the performance of metals chloride activated carbon prepared from castor bean residue. Rhodamine B was selected as the model dye due to its high stability with change in pH and hazardous properties. Castor bean residue is suitable to be used as precursor to replace conventional activated carbon due to its low cost and high carbon content. The preparation of activated carbons was conducted through impregnation with ZnCl2, potassium chloride, magnesium chloride, ferric chloride and metals chloride composite at various impregnation ratios from 0.5 to 2.5. Activated carbons were characterized based on proximate analysis, elemental analysis, textural characteristics and chemical properties. The adsorption data were analysed using isotherm models, kinetics models and thermodynamics properties. The regeneration of activated carbon was carried out by hot water and irradiated water at three regeneration cycles. The specific surface area of activated carbons of ratio 1.0 are in descending order of potassium chloride (KCBR-1.0), ferric-zinc chloride (FZCBR), magnesium-zinc chloride (MZCBR), zinc chloride (ZCBR-1.0), ferric chloride (FCBR-1.0), potassium-zinc chloride (KZCBR), magnesium chloride (MCBR-1.0). ZCBR-1.0 demonstrated a greater rhodamine B adsorption of 175 mg/g compared to the other activated carbons counterparts. Nevertheless, the composite activated carbons, MZCBR and FZCBR displayed adsorptive capacity of 114 and 115 mg/g, respectively, which indicates the mixtures of less hazardous metal chloride salts as the promising activating agents. The adsorption capacity of rhodamine B by activated carbons of ratio 1.0 are in descending order of ZCBR-1.0, FZCBR, MZCBR, FCBR-1.0, MCBR-1.0, KCBR-1.0, KZCBR. Adsorption mechanism of ZCBR-1.0 obeyed Langmuir isotherm and pseudo-second-order kinetics model. The rate-limiting step in the adsorption of rhodamine B is film diffusion. The positive values of enthalpy change and entropy change indicate of that the adsorption process is endothermic and spontaneous at high temperature. Hot water regeneration onto rhodamine B loaded activated carbon showed a better performance with 37.7 % regeneration efficiency and 34.4% recovery. 2016-08 Thesis http://eprints.utm.my/id/eprint/78131/ http://eprints.utm.my/id/eprint/78131/1/LeeLinZhiMFChE2016.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:95669 masters Universiti Teknologi Malaysia, Faculty of Science Faculty of Science
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	QD Chemistry
spellingShingle	QD Chemistry Lee, Lin Zhi Adsorption of rhodamine B by metals chloride -activated castor bean residue carbon
description	Zinc chloride (ZnCl2) is a well-known pollutant which is toxic to the aquatic organisms. A study of adsorption of rhodamine B was conducted to investigate the performance of metals chloride activated carbon prepared from castor bean residue. Rhodamine B was selected as the model dye due to its high stability with change in pH and hazardous properties. Castor bean residue is suitable to be used as precursor to replace conventional activated carbon due to its low cost and high carbon content. The preparation of activated carbons was conducted through impregnation with ZnCl2, potassium chloride, magnesium chloride, ferric chloride and metals chloride composite at various impregnation ratios from 0.5 to 2.5. Activated carbons were characterized based on proximate analysis, elemental analysis, textural characteristics and chemical properties. The adsorption data were analysed using isotherm models, kinetics models and thermodynamics properties. The regeneration of activated carbon was carried out by hot water and irradiated water at three regeneration cycles. The specific surface area of activated carbons of ratio 1.0 are in descending order of potassium chloride (KCBR-1.0), ferric-zinc chloride (FZCBR), magnesium-zinc chloride (MZCBR), zinc chloride (ZCBR-1.0), ferric chloride (FCBR-1.0), potassium-zinc chloride (KZCBR), magnesium chloride (MCBR-1.0). ZCBR-1.0 demonstrated a greater rhodamine B adsorption of 175 mg/g compared to the other activated carbons counterparts. Nevertheless, the composite activated carbons, MZCBR and FZCBR displayed adsorptive capacity of 114 and 115 mg/g, respectively, which indicates the mixtures of less hazardous metal chloride salts as the promising activating agents. The adsorption capacity of rhodamine B by activated carbons of ratio 1.0 are in descending order of ZCBR-1.0, FZCBR, MZCBR, FCBR-1.0, MCBR-1.0, KCBR-1.0, KZCBR. Adsorption mechanism of ZCBR-1.0 obeyed Langmuir isotherm and pseudo-second-order kinetics model. The rate-limiting step in the adsorption of rhodamine B is film diffusion. The positive values of enthalpy change and entropy change indicate of that the adsorption process is endothermic and spontaneous at high temperature. Hot water regeneration onto rhodamine B loaded activated carbon showed a better performance with 37.7 % regeneration efficiency and 34.4% recovery.
format	Thesis
qualification_level	Master's degree
author	Lee, Lin Zhi
author_facet	Lee, Lin Zhi
author_sort	Lee, Lin Zhi
title	Adsorption of rhodamine B by metals chloride -activated castor bean residue carbon
title_short	Adsorption of rhodamine B by metals chloride -activated castor bean residue carbon
title_full	Adsorption of rhodamine B by metals chloride -activated castor bean residue carbon
title_fullStr	Adsorption of rhodamine B by metals chloride -activated castor bean residue carbon
title_full_unstemmed	Adsorption of rhodamine B by metals chloride -activated castor bean residue carbon
title_sort	adsorption of rhodamine b by metals chloride -activated castor bean residue carbon
granting_institution	Universiti Teknologi Malaysia, Faculty of Science
granting_department	Faculty of Science
publishDate	2016
url	http://eprints.utm.my/id/eprint/78131/1/LeeLinZhiMFChE2016.pdf
_version_	1747817914597113856

Adsorption of rhodamine B by metals chloride -activated castor bean residue carbon

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