Adsorption Studies Of Heavy Metals On Activated Carbon Prepared From Agricultural Waste

Commercially available activated carbon (AC) is still considered expensive due to the use of non-renewable and relatively expensive starting material such as bituminous coal. Therefore, this study investigates the potential use of agricultural waste such as rubber seed coat (RSC) and corncob (CC) th...

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Main Author:	Latiff, Muhamad Faizal Pakir Mohamed
Format:	Thesis
Language:	English
Published:	2018
Subjects:	T Technology TP155-156 Chemical engineering
Online Access:	http://eprints.usm.my/47412/1/Adsorption%20Studies%20Of%20Heavy%20Metals%20On%20Activated%20Carbon%20Prepared%20From%20Agricultural%20Waste.pdf
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spelling	my-usm-ep.474122021-11-17T03:42:13Z Adsorption Studies Of Heavy Metals On Activated Carbon Prepared From Agricultural Waste 2018-03-01 Latiff, Muhamad Faizal Pakir Mohamed T Technology TP155-156 Chemical engineering Commercially available activated carbon (AC) is still considered expensive due to the use of non-renewable and relatively expensive starting material such as bituminous coal. Therefore, this study investigates the potential use of agricultural waste such as rubber seed coat (RSC) and corncob (CC) that available in Malaysia, as the precursor for the preparation of AC which can be applied for the removal of two types of heavy metal, which are Cu (II) and Zn (II) from aqueous solution. Physiochemical activation consisting of potassium hydroxide (KOH) impregnation plus carbon dioxide (CO2) gasification was used to prepare the ACs. The optimum preparation conditions of RSCAC-CU were found at activation temperature of 793 °C, activation time of 1h and KOH impregnation ratio (IR) of 2.46. As for RSCAC-ZN, the optimum preparation conditions were at activation temperature of 797 °C, activation time of 1h and IR of 2.61. Meanwhile, the optimum preparation conditions of CCAC-CU were found at activation temperature of 762 °C, activation time of 2.7h and IR of 3.25. For CCAC-ZN, the optimum preparation conditions were at activation temperature of 768 °C, activation time of 3h and IR of 3.5. All the activated carbons prepared were high BET surface area (>500 m2/g) and pore volume (>0.41 m3/g). RSCAC and CCAC demonstrated homogeneous and heterogeneous type pore structures, respectively. The effects of adsorbate initial concentration (10-100 mg/L), contact time, solution temperature (30-60 °C), solution pH (2-6), isotherms and kinetics of the adsorption systems were evaluated through batch adsorption test. The Cu (II) and Zn (II) adsorption uptakes increased with increasing initial concentration and optimum contact time. Adsorptions of Cu (II) and Zn (II) on all ACs were best fitted by the Freundlich isotherm model. Adsorption kinetics of Cu (II) and Zn (II) followed pseudo-second-order on all the ACs. Fixed bed study showed that the exhaustion period for Zn (II) was greater than Cu (II) and the increase in bed heights resulted in higher exhaustion period. 2018-03 Thesis http://eprints.usm.my/47412/ http://eprints.usm.my/47412/1/Adsorption%20Studies%20Of%20Heavy%20Metals%20On%20Activated%20Carbon%20Prepared%20From%20Agricultural%20Waste.pdf application/pdf en public phd doctoral 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 Latiff, Muhamad Faizal Pakir Mohamed Adsorption Studies Of Heavy Metals On Activated Carbon Prepared From Agricultural Waste
description	Commercially available activated carbon (AC) is still considered expensive due to the use of non-renewable and relatively expensive starting material such as bituminous coal. Therefore, this study investigates the potential use of agricultural waste such as rubber seed coat (RSC) and corncob (CC) that available in Malaysia, as the precursor for the preparation of AC which can be applied for the removal of two types of heavy metal, which are Cu (II) and Zn (II) from aqueous solution. Physiochemical activation consisting of potassium hydroxide (KOH) impregnation plus carbon dioxide (CO2) gasification was used to prepare the ACs. The optimum preparation conditions of RSCAC-CU were found at activation temperature of 793 °C, activation time of 1h and KOH impregnation ratio (IR) of 2.46. As for RSCAC-ZN, the optimum preparation conditions were at activation temperature of 797 °C, activation time of 1h and IR of 2.61. Meanwhile, the optimum preparation conditions of CCAC-CU were found at activation temperature of 762 °C, activation time of 2.7h and IR of 3.25. For CCAC-ZN, the optimum preparation conditions were at activation temperature of 768 °C, activation time of 3h and IR of 3.5. All the activated carbons prepared were high BET surface area (>500 m2/g) and pore volume (>0.41 m3/g). RSCAC and CCAC demonstrated homogeneous and heterogeneous type pore structures, respectively. The effects of adsorbate initial concentration (10-100 mg/L), contact time, solution temperature (30-60 °C), solution pH (2-6), isotherms and kinetics of the adsorption systems were evaluated through batch adsorption test. The Cu (II) and Zn (II) adsorption uptakes increased with increasing initial concentration and optimum contact time. Adsorptions of Cu (II) and Zn (II) on all ACs were best fitted by the Freundlich isotherm model. Adsorption kinetics of Cu (II) and Zn (II) followed pseudo-second-order on all the ACs. Fixed bed study showed that the exhaustion period for Zn (II) was greater than Cu (II) and the increase in bed heights resulted in higher exhaustion period.
format	Thesis
qualification_name	Doctor of Philosophy (PhD.)
qualification_level	Doctorate
author	Latiff, Muhamad Faizal Pakir Mohamed
author_facet	Latiff, Muhamad Faizal Pakir Mohamed
author_sort	Latiff, Muhamad Faizal Pakir Mohamed
title	Adsorption Studies Of Heavy Metals On Activated Carbon Prepared From Agricultural Waste
title_short	Adsorption Studies Of Heavy Metals On Activated Carbon Prepared From Agricultural Waste
title_full	Adsorption Studies Of Heavy Metals On Activated Carbon Prepared From Agricultural Waste
title_fullStr	Adsorption Studies Of Heavy Metals On Activated Carbon Prepared From Agricultural Waste
title_full_unstemmed	Adsorption Studies Of Heavy Metals On Activated Carbon Prepared From Agricultural Waste
title_sort	adsorption studies of heavy metals on activated carbon prepared from agricultural waste
granting_institution	Universiti Sains Malaysia
granting_department	Pusat Pengajian Kejuruteraan Kimia
publishDate	2018
url	http://eprints.usm.my/47412/1/Adsorption%20Studies%20Of%20Heavy%20Metals%20On%20Activated%20Carbon%20Prepared%20From%20Agricultural%20Waste.pdf
_version_	1747821772358549504

Adsorption Studies Of Heavy Metals On Activated Carbon Prepared From Agricultural Waste

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