Removal of Congo Red and reactive black 5 dyes from aqueous solution using polyethylenimine-modified coffee waste adsorbent

The industrial wastewater especially from textiles industry contain high concentration of dyes that could bring adverse health effect to the human and aquatic life. In past researches, it has been shown that coffee waste is a potential adsorbent for cationic dye in comparison to anionic dye. Thus, i...

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Main Author:	Abd. Ghafar, Nawal
Format:	Thesis
Language:	English
Published:	2018
Subjects:	TP Chemical technology
Online Access:	http://eprints.utm.my/id/eprint/86078/2/NawalAbdGhafarMSChE2018.pdf
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spelling	my-utm-ep.860782020-08-30T08:53:24Z Removal of Congo Red and reactive black 5 dyes from aqueous solution using polyethylenimine-modified coffee waste adsorbent 2018 Abd. Ghafar, Nawal TP Chemical technology The industrial wastewater especially from textiles industry contain high concentration of dyes that could bring adverse health effect to the human and aquatic life. In past researches, it has been shown that coffee waste is a potential adsorbent for cationic dye in comparison to anionic dye. Thus, in this study, polyethyleniminemodified coffee waste (PEI-CW) was synthesized through crosslinking reaction to evaluate its use as a potential adsorbent in removal o f hazardous anionic Congo Red (CR) and Reactive Black 5 (RB5) dyes from aqueous solution. The type of characterizations that were conducted on the adsorbent are FTIR, BET, BJH and XRD analysis. The presence of substantial amine group on PEI-CW was confirmed through FTIR analysis. The BET and BJH analysis showed a decrement in surface area and total pore volume of CW along with an increase in pore diameter after modification with PEI. The XRD analysis showed there is no obvious difference in crystalline structure of CW after being modified with PEI. Through batch adsorption experiment, PEI-CW has been proven to be a potential adsorbent due to 99% removal of 50 mg/L CR and RB5 dye from aqueous solution. The optimum parameter for CR dye aqueous solution is 60°C, pH 3, 0.1 g PEI-CW and 120 minutes. Whereas, for RB5 dye adsorption, the optimum parameter is 25 °C, pH 7, 0.1 g PEI-CW and 60 minutes. Model-fitting study showed Langmuir adsorption isotherm and pseudo-second order kinetic model as a better fit for both CR and RB5 dyes adsorption process. From Langmuir model, the maximum adsorption capacity was found to be higher for RB5 dye adsorption, which is at 77.5194 mg/g compared to 34.3543 mg/g for CR dye. The thermodynamic analysis suggested that both CR and RB5 dyes adsorption process is physisorption, spontaneous and endothermic in nature. From this study, it is inferred that PEI-CW could be potential low-cost adsorbent in removal of anionic CR and RB5 dyes from the aqueous solution, although higher adsorption is observed towards RB5 than CR dyes. 2018 Thesis http://eprints.utm.my/id/eprint/86078/ http://eprints.utm.my/id/eprint/86078/2/NawalAbdGhafarMSChE2018.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:132079 masters Universiti Teknologi Malaysia, Faculty of Engineering - School of Chemical & Energy Engineering Faculty of Engineering - School of Chemical & Energy Engineering
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	TP Chemical technology
spellingShingle	TP Chemical technology Abd. Ghafar, Nawal Removal of Congo Red and reactive black 5 dyes from aqueous solution using polyethylenimine-modified coffee waste adsorbent
description	The industrial wastewater especially from textiles industry contain high concentration of dyes that could bring adverse health effect to the human and aquatic life. In past researches, it has been shown that coffee waste is a potential adsorbent for cationic dye in comparison to anionic dye. Thus, in this study, polyethyleniminemodified coffee waste (PEI-CW) was synthesized through crosslinking reaction to evaluate its use as a potential adsorbent in removal o f hazardous anionic Congo Red (CR) and Reactive Black 5 (RB5) dyes from aqueous solution. The type of characterizations that were conducted on the adsorbent are FTIR, BET, BJH and XRD analysis. The presence of substantial amine group on PEI-CW was confirmed through FTIR analysis. The BET and BJH analysis showed a decrement in surface area and total pore volume of CW along with an increase in pore diameter after modification with PEI. The XRD analysis showed there is no obvious difference in crystalline structure of CW after being modified with PEI. Through batch adsorption experiment, PEI-CW has been proven to be a potential adsorbent due to 99% removal of 50 mg/L CR and RB5 dye from aqueous solution. The optimum parameter for CR dye aqueous solution is 60°C, pH 3, 0.1 g PEI-CW and 120 minutes. Whereas, for RB5 dye adsorption, the optimum parameter is 25 °C, pH 7, 0.1 g PEI-CW and 60 minutes. Model-fitting study showed Langmuir adsorption isotherm and pseudo-second order kinetic model as a better fit for both CR and RB5 dyes adsorption process. From Langmuir model, the maximum adsorption capacity was found to be higher for RB5 dye adsorption, which is at 77.5194 mg/g compared to 34.3543 mg/g for CR dye. The thermodynamic analysis suggested that both CR and RB5 dyes adsorption process is physisorption, spontaneous and endothermic in nature. From this study, it is inferred that PEI-CW could be potential low-cost adsorbent in removal of anionic CR and RB5 dyes from the aqueous solution, although higher adsorption is observed towards RB5 than CR dyes.
format	Thesis
qualification_level	Master's degree
author	Abd. Ghafar, Nawal
author_facet	Abd. Ghafar, Nawal
author_sort	Abd. Ghafar, Nawal
title	Removal of Congo Red and reactive black 5 dyes from aqueous solution using polyethylenimine-modified coffee waste adsorbent
title_short	Removal of Congo Red and reactive black 5 dyes from aqueous solution using polyethylenimine-modified coffee waste adsorbent
title_full	Removal of Congo Red and reactive black 5 dyes from aqueous solution using polyethylenimine-modified coffee waste adsorbent
title_fullStr	Removal of Congo Red and reactive black 5 dyes from aqueous solution using polyethylenimine-modified coffee waste adsorbent
title_full_unstemmed	Removal of Congo Red and reactive black 5 dyes from aqueous solution using polyethylenimine-modified coffee waste adsorbent
title_sort	removal of congo red and reactive black 5 dyes from aqueous solution using polyethylenimine-modified coffee waste adsorbent
granting_institution	Universiti Teknologi Malaysia, Faculty of Engineering - School of Chemical & Energy Engineering
granting_department	Faculty of Engineering - School of Chemical & Energy Engineering
publishDate	2018
url	http://eprints.utm.my/id/eprint/86078/2/NawalAbdGhafarMSChE2018.pdf
_version_	1747818492046868480

Removal of Congo Red and reactive black 5 dyes from aqueous solution using polyethylenimine-modified coffee waste adsorbent

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