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Removal of mercury (II) ion from industrial wastewater using palm oil fuel ash

Activated palm oil fuel ashes (POFA) were used as the adsorbents for the removal of mercury (II) ion from industrial wastewater. From the preliminary experimental results, it shows that the POFA had good adsorption capability for mercury (II) ion. The adsorption process of mercury (II) ion using POF...

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Main Author: Imla Syafiqah, Mohd Salleh
Format: Thesis
Language:English
Published: 2018
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TP Chemical technology
Online Access:http://umpir.ump.edu.my/id/eprint/23352/1/Removal%20of%20mercury%20%28II%29%20ion%20from%20industrial%20wastewater%20using%20palm%20oil%20fuel%20ash.pdf
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spelling my.ump.umpir.233522021-11-10T04:25:54Z http://umpir.ump.edu.my/id/eprint/23352/ Removal of mercury (II) ion from industrial wastewater using palm oil fuel ash Imla Syafiqah, Mohd Salleh TP Chemical technology Activated palm oil fuel ashes (POFA) were used as the adsorbents for the removal of mercury (II) ion from industrial wastewater. From the preliminary experimental results, it shows that the POFA had good adsorption capability for mercury (II) ion. The adsorption process of mercury (II) ion using POFA not only contributes to the mercury adsorption from industrial wastewater but also removes the environmental pollution caused by accumulation and abundance of waste in nature. Therefore, POFA was introduced as a raw material in this study to maximize the utilization of oil palm waste. POFA was activated using chemical activation and sulphuric acid used as a solvent before proceeding with mercury (II) ion adsorption process. Scanning electron microscopy (SEM), fourier transform infrared spectrometry (FTIR), thermal gravimetric analysis (TGA), and Brunauer-Emmett-Teller (BET) surface area analysis had been applied to observe the effect of the POFA structure before and after activation. The screening study was analyzed using fractional factorial design (FFD). In factorial analysis study, the best mercury (II) ion removal condition removed 98.03 ± 0.06 % when performed at 100 rpm of agitation speed, pH 2, 5 mg/L of initial mercury (II) ion concentration, 0.25 g of adsorbent dosages and 4 h of contact time. From this screening study, two factors which are contact time and agitation speed were selected for further analysis in optimization part. The optimization of mercury (II) ion removal efficiency was done by using central composite design (CCD) in response surface methodology (RSM). In central composite design (CCD), the optimum condition for mercury (II) ion removal was obtained at 150 rpm for 5 h which removed 98.93 ± 0.02 % of mercury (II) ion. The equilibrium data at various concentrations were analysed by Langmuir and Freundlich isotherms models. From this present study, the values of correlation coefficient (R2) obtained from the Freundlich isotherm was 0.9899. A kinetic study was carried out with pseudo first order and pseudo second order reaction equations. It was found that the mercury (II) ion uptake process followed the pseudo second order rate expression. Thermodynamic parameters of the Gibbs free energy (Δ 2018-06 Thesis NonPeerReviewed pdf en http://umpir.ump.edu.my/id/eprint/23352/1/Removal%20of%20mercury%20%28II%29%20ion%20from%20industrial%20wastewater%20using%20palm%20oil%20fuel%20ash.pdf Imla Syafiqah, Mohd Salleh (2018) Removal of mercury (II) ion from industrial wastewater using palm oil fuel ash. Masters thesis, Universiti Malaysia Pahang.
institution Universiti Malaysia Pahang
building UMP Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Pahang
content_source UMP Institutional Repository
url_provider http://umpir.ump.edu.my/
language English
topic TP Chemical technology
spellingShingle TP Chemical technology
Imla Syafiqah, Mohd Salleh
Removal of mercury (II) ion from industrial wastewater using palm oil fuel ash
description Activated palm oil fuel ashes (POFA) were used as the adsorbents for the removal of mercury (II) ion from industrial wastewater. From the preliminary experimental results, it shows that the POFA had good adsorption capability for mercury (II) ion. The adsorption process of mercury (II) ion using POFA not only contributes to the mercury adsorption from industrial wastewater but also removes the environmental pollution caused by accumulation and abundance of waste in nature. Therefore, POFA was introduced as a raw material in this study to maximize the utilization of oil palm waste. POFA was activated using chemical activation and sulphuric acid used as a solvent before proceeding with mercury (II) ion adsorption process. Scanning electron microscopy (SEM), fourier transform infrared spectrometry (FTIR), thermal gravimetric analysis (TGA), and Brunauer-Emmett-Teller (BET) surface area analysis had been applied to observe the effect of the POFA structure before and after activation. The screening study was analyzed using fractional factorial design (FFD). In factorial analysis study, the best mercury (II) ion removal condition removed 98.03 ± 0.06 % when performed at 100 rpm of agitation speed, pH 2, 5 mg/L of initial mercury (II) ion concentration, 0.25 g of adsorbent dosages and 4 h of contact time. From this screening study, two factors which are contact time and agitation speed were selected for further analysis in optimization part. The optimization of mercury (II) ion removal efficiency was done by using central composite design (CCD) in response surface methodology (RSM). In central composite design (CCD), the optimum condition for mercury (II) ion removal was obtained at 150 rpm for 5 h which removed 98.93 ± 0.02 % of mercury (II) ion. The equilibrium data at various concentrations were analysed by Langmuir and Freundlich isotherms models. From this present study, the values of correlation coefficient (R2) obtained from the Freundlich isotherm was 0.9899. A kinetic study was carried out with pseudo first order and pseudo second order reaction equations. It was found that the mercury (II) ion uptake process followed the pseudo second order rate expression. Thermodynamic parameters of the Gibbs free energy (Δ
format Thesis
author Imla Syafiqah, Mohd Salleh
author_facet Imla Syafiqah, Mohd Salleh
author_sort Imla Syafiqah, Mohd Salleh
title Removal of mercury (II) ion from industrial wastewater using palm oil fuel ash
title_short Removal of mercury (II) ion from industrial wastewater using palm oil fuel ash
title_full Removal of mercury (II) ion from industrial wastewater using palm oil fuel ash
title_fullStr Removal of mercury (II) ion from industrial wastewater using palm oil fuel ash
title_full_unstemmed Removal of mercury (II) ion from industrial wastewater using palm oil fuel ash
title_sort removal of mercury (ii) ion from industrial wastewater using palm oil fuel ash
publishDate 2018
url http://umpir.ump.edu.my/id/eprint/23352/1/Removal%20of%20mercury%20%28II%29%20ion%20from%20industrial%20wastewater%20using%20palm%20oil%20fuel%20ash.pdf
http://umpir.ump.edu.my/id/eprint/23352/
_version_ 1717093622345629696
score 13.211869

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