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Adsorption of benzene and toluene onto KOH activated coconut shell based carbon treated with NH3

Volatile organic compounds (VOCs) have been reported to be responsible for many acute and chronic health effects and environmental degradations. In this study, coconut shell based porous carbon was produced through chemical activation with potassium hydroxide (PHAC) and chemically treated with ammon...

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Main Authors: Mohammed, Jibril, Nasri, Noor Shawal, Zaini, Muhammad Abbas Ahmad, Hamza, Usman Dadum, Ani, Farid Nasir
Format: Article
Published: Elsevier 2015
Subjects:
TP Chemical technology
Online Access:http://eprints.utm.my/id/eprint/57706/
http://dx.doi.org/10.1016/j.ibiod.2015.02.012
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spelling my.utm.577062017-02-02T05:35:12Z http://eprints.utm.my/id/eprint/57706/ Adsorption of benzene and toluene onto KOH activated coconut shell based carbon treated with NH3 Mohammed, Jibril Nasri, Noor Shawal Zaini, Muhammad Abbas Ahmad Hamza, Usman Dadum Ani, Farid Nasir TP Chemical technology Volatile organic compounds (VOCs) have been reported to be responsible for many acute and chronic health effects and environmental degradations. In this study, coconut shell based porous carbon was produced through chemical activation with potassium hydroxide (PHAC) and chemically treated with ammonia (PHAC-AM) to improve the adsorption of benzene and toluene. The porous carbons were characterized using Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and nitrogen adsorption tests. Removal efficiencies and adsorption capacities of the activated carbon samples for benzene and toluene were carried out through batch studies. Langmuir, Freundlich and Temkin adsorption isotherms were tested for the adsorption process and the experimental data were best fitted by Langmuir model. Pseudo-second-order kinetic model best described the adsorption kinetics for the two VOCs on PHAC and PHAC-AM. The removal of benzene and toluene by PHAC are; 82.5 and 85.6%, while that of PHAC-AM are; 91 and 92.3% respectively with approximately 10% increase in the uptake after the ammonia treatment. After five cycles of adsorbents regeneration test, approximately 50% of benzene and toluene was still able to be removed. The results of this study revealed that ammonia treated activate carbon (PHAC-AM) is a sustainable adsorbent for treatment of VOCs in polluted waters Elsevier 2015-08 Article PeerReviewed Mohammed, Jibril and Nasri, Noor Shawal and Zaini, Muhammad Abbas Ahmad and Hamza, Usman Dadum and Ani, Farid Nasir (2015) Adsorption of benzene and toluene onto KOH activated coconut shell based carbon treated with NH3. International Biodeterioration & Biodegradation, 102 . pp. 245-255. ISSN 9608-5241 http://dx.doi.org/10.1016/j.ibiod.2015.02.012 DOI:10.1016/j.ibiod.2015.02.012
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
topic TP Chemical technology
spellingShingle TP Chemical technology
Mohammed, Jibril
Nasri, Noor Shawal
Zaini, Muhammad Abbas Ahmad
Hamza, Usman Dadum
Ani, Farid Nasir
Adsorption of benzene and toluene onto KOH activated coconut shell based carbon treated with NH3
description Volatile organic compounds (VOCs) have been reported to be responsible for many acute and chronic health effects and environmental degradations. In this study, coconut shell based porous carbon was produced through chemical activation with potassium hydroxide (PHAC) and chemically treated with ammonia (PHAC-AM) to improve the adsorption of benzene and toluene. The porous carbons were characterized using Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and nitrogen adsorption tests. Removal efficiencies and adsorption capacities of the activated carbon samples for benzene and toluene were carried out through batch studies. Langmuir, Freundlich and Temkin adsorption isotherms were tested for the adsorption process and the experimental data were best fitted by Langmuir model. Pseudo-second-order kinetic model best described the adsorption kinetics for the two VOCs on PHAC and PHAC-AM. The removal of benzene and toluene by PHAC are; 82.5 and 85.6%, while that of PHAC-AM are; 91 and 92.3% respectively with approximately 10% increase in the uptake after the ammonia treatment. After five cycles of adsorbents regeneration test, approximately 50% of benzene and toluene was still able to be removed. The results of this study revealed that ammonia treated activate carbon (PHAC-AM) is a sustainable adsorbent for treatment of VOCs in polluted waters
format Article
author Mohammed, Jibril
Nasri, Noor Shawal
Zaini, Muhammad Abbas Ahmad
Hamza, Usman Dadum
Ani, Farid Nasir
author_facet Mohammed, Jibril
Nasri, Noor Shawal
Zaini, Muhammad Abbas Ahmad
Hamza, Usman Dadum
Ani, Farid Nasir
author_sort Mohammed, Jibril
title Adsorption of benzene and toluene onto KOH activated coconut shell based carbon treated with NH3
title_short Adsorption of benzene and toluene onto KOH activated coconut shell based carbon treated with NH3
title_full Adsorption of benzene and toluene onto KOH activated coconut shell based carbon treated with NH3
title_fullStr Adsorption of benzene and toluene onto KOH activated coconut shell based carbon treated with NH3
title_full_unstemmed Adsorption of benzene and toluene onto KOH activated coconut shell based carbon treated with NH3
title_sort adsorption of benzene and toluene onto koh activated coconut shell based carbon treated with nh3
publisher Elsevier
publishDate 2015
url http://eprints.utm.my/id/eprint/57706/
http://dx.doi.org/10.1016/j.ibiod.2015.02.012
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score 13.211869

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