Adsorption of hydrogen sulfide from simulated waste water using locally –sourced adsorbents

problems. The removal of H2S (aq) from a simulated petroleum refinery waste water using activated carbons produced from agricultural by-product such as, coconut shell (CNS), palm kernel shell (PKS), and wood sawdust (WSD) were investigated. The activated carbons obtained from the CNS, PKS, and WSD w...

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Main Author:	Habeeb, Omar Abed
Format:	Thesis
Language:	English
Published:	2018
Subjects:	TP Chemical technology
Online Access:	http://umpir.ump.edu.my/id/eprint/23491/1/Adsorption%20of%20hydrogen%20sulfide%20from%20simulated%20waste%20water%20using%20locally%20%E2%80%93sourced%20adsorbents.wm.pdf
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spelling	my-ump-ir.234912023-01-30T04:31:12Z Adsorption of hydrogen sulfide from simulated waste water using locally –sourced adsorbents 2018 Habeeb, Omar Abed TP Chemical technology problems. The removal of H2S (aq) from a simulated petroleum refinery waste water using activated carbons produced from agricultural by-product such as, coconut shell (CNS), palm kernel shell (PKS), and wood sawdust (WSD) were investigated. The activated carbons obtained from the CNS, PKS, and WSD were chemically activated using KOH. The activated carbons (ACs) were modified by impregnating with calcium (Ca) extracted from egg shells to produce impregnated activated carbons (IACs) namely Ca-ACCNS, Ca-ACPKS and Ca-ACWSD. The prepared ACs and IACs were characterized using SEM/EDX, FTIR, BET, TGA, XRD and XPS. Comparative studies between all the six adsorbents for the removal of H2S (aq) from the simulated waste water were carried out. The adsorption studies revealed that Ca-modified PKS-based activated carbon (Ca-ACPKS) has shown best performance for the removal of H2S (aq). An optimization studies for the preparation conditions of the selected adsorbent (Ca-ACPKS) was investigated using Response Surface Methodology (RSM) and the optimum preparation conditions were found to be calcination temperature of 880 °C, calcium solution concentration of 49.31 %v, and calcination time of 57.5 min with removal efficiency of 99.2% and yield of 33.8%. Moreover, operating factors such as initial concentration of H2S (aq), adsorption contact time, dosage, pH of solution, and agitation speed were initially screened using 2 level factorial approach and the resulted significant factors were initial concentration of H2S (aq), adsorption contact time, and dosage were significant on the removal of H2S (aq). Furthermore, the effect of these three operating parameters were investigated using the central composite design (CCD) techniques of RSM and the optimum conditions obtained were initial concentration of H2S of 440 mg/L, adsorption contact time of 585 min, and dosage of 1.05 g Ca-ACPKS. The optimum operating conditions resulted in a removal efficiency of 99.5% with equilibrium concentration (0.5-2.2 mg/L) which was close to Department of Environment (DOE) standard B (0.5 mg/L) using real waste water. The kinetic studies of the adsorption behaviour of Ca-ACPKS have shown that Freundlich adsorption isotherm was fitted well and the adsorption process followed Pseudo- second order kinetic model. The maximum adsorption capacity of Ca-ACPKS was 543.4 mg/g. It can be concluded that Ca-ACPKS has an effective adsorbent for the removal of H2S (aq) from simulated waste water. 2018 Thesis http://umpir.ump.edu.my/id/eprint/23491/ http://umpir.ump.edu.my/id/eprint/23491/1/Adsorption%20of%20hydrogen%20sulfide%20from%20simulated%20waste%20water%20using%20locally%20%E2%80%93sourced%20adsorbents.wm.pdf pdf en public phd doctoral Universiti Malaysia Pahang Faculty of Chemical & Natural Resources Engineering Ramesh, K
institution	Universiti Malaysia Pahang Al-Sultan Abdullah
collection	UMPSA Institutional Repository
language	English
advisor	Ramesh, K
topic	TP Chemical technology
spellingShingle	TP Chemical technology Habeeb, Omar Abed Adsorption of hydrogen sulfide from simulated waste water using locally –sourced adsorbents
description	problems. The removal of H2S (aq) from a simulated petroleum refinery waste water using activated carbons produced from agricultural by-product such as, coconut shell (CNS), palm kernel shell (PKS), and wood sawdust (WSD) were investigated. The activated carbons obtained from the CNS, PKS, and WSD were chemically activated using KOH. The activated carbons (ACs) were modified by impregnating with calcium (Ca) extracted from egg shells to produce impregnated activated carbons (IACs) namely Ca-ACCNS, Ca-ACPKS and Ca-ACWSD. The prepared ACs and IACs were characterized using SEM/EDX, FTIR, BET, TGA, XRD and XPS. Comparative studies between all the six adsorbents for the removal of H2S (aq) from the simulated waste water were carried out. The adsorption studies revealed that Ca-modified PKS-based activated carbon (Ca-ACPKS) has shown best performance for the removal of H2S (aq). An optimization studies for the preparation conditions of the selected adsorbent (Ca-ACPKS) was investigated using Response Surface Methodology (RSM) and the optimum preparation conditions were found to be calcination temperature of 880 °C, calcium solution concentration of 49.31 %v, and calcination time of 57.5 min with removal efficiency of 99.2% and yield of 33.8%. Moreover, operating factors such as initial concentration of H2S (aq), adsorption contact time, dosage, pH of solution, and agitation speed were initially screened using 2 level factorial approach and the resulted significant factors were initial concentration of H2S (aq), adsorption contact time, and dosage were significant on the removal of H2S (aq). Furthermore, the effect of these three operating parameters were investigated using the central composite design (CCD) techniques of RSM and the optimum conditions obtained were initial concentration of H2S of 440 mg/L, adsorption contact time of 585 min, and dosage of 1.05 g Ca-ACPKS. The optimum operating conditions resulted in a removal efficiency of 99.5% with equilibrium concentration (0.5-2.2 mg/L) which was close to Department of Environment (DOE) standard B (0.5 mg/L) using real waste water. The kinetic studies of the adsorption behaviour of Ca-ACPKS have shown that Freundlich adsorption isotherm was fitted well and the adsorption process followed Pseudo- second order kinetic model. The maximum adsorption capacity of Ca-ACPKS was 543.4 mg/g. It can be concluded that Ca-ACPKS has an effective adsorbent for the removal of H2S (aq) from simulated waste water.
format	Thesis
qualification_name	Doctor of Philosophy (PhD.)
qualification_level	Doctorate
author	Habeeb, Omar Abed
author_facet	Habeeb, Omar Abed
author_sort	Habeeb, Omar Abed
title	Adsorption of hydrogen sulfide from simulated waste water using locally –sourced adsorbents
title_short	Adsorption of hydrogen sulfide from simulated waste water using locally –sourced adsorbents
title_full	Adsorption of hydrogen sulfide from simulated waste water using locally –sourced adsorbents
title_fullStr	Adsorption of hydrogen sulfide from simulated waste water using locally –sourced adsorbents
title_full_unstemmed	Adsorption of hydrogen sulfide from simulated waste water using locally –sourced adsorbents
title_sort	adsorption of hydrogen sulfide from simulated waste water using locally –sourced adsorbents
granting_institution	Universiti Malaysia Pahang
granting_department	Faculty of Chemical & Natural Resources Engineering
publishDate	2018
url	http://umpir.ump.edu.my/id/eprint/23491/1/Adsorption%20of%20hydrogen%20sulfide%20from%20simulated%20waste%20water%20using%20locally%20%E2%80%93sourced%20adsorbents.wm.pdf
_version_	1783732069671632896

Adsorption of hydrogen sulfide from simulated waste water using locally –sourced adsorbents

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