000			04117ntm a2200349 i 4500
001			vtls000104315
003			KUKTEM
005			20251117113410.0
008			180716s2018 my da f am 000 0 eng d
020			_aTHE0000893(Local)
039		9	_a201905271506 _bnazirah _y201807161604 _zsaini
040			_aUMP _beng _cUMP _erda
090			_aFKKSA .H33 2018 r Thesis
100	1		_aHabeeb, Omar Abed, _eauthor.
245	1	0	_aAdsorption of hydrogen sulfide from simulated waste water using locally –sourced adsorbents / _cOmar Abed Habeeb
264		1	_aKuantan, Pahang : _bUMP, _c2018
300			_axviii, 173 pages : _billustrations (some color), charts ; _c30 cm. + _e1 CD-ROM
336			_atext _2rdacontent
337			_aunmediated _2rdamedia
337			_acomputer _2rdamedia
338			_avolume _2rdacarrier
338			_acomputer disc _2rdacarrier
347			_atext file _bPDF _2rda
500			_aFaculty of Chemical and Natural Resources Engineering
502			_aThesis (Doctor of Philosophy in Chemical and Natural Resources Engineering) -- Universiti Malaysia Pahang – 2018
504			_aIncludes bibliographical references
520	3		_aHydrogen sulfide (H2S) (aq) is one of the most toxic pollutants in petroleum refinery waste water. It is very harmful to human health and causes environmental and economic 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.
610	2	0	_aFaculty of Chemical & Natural Resources Engineering _xDissertations
650		0	_aUniversities and colleges _xDisertations
650		0	_aTheses
999			_aVIRTUA40 _c7989 _d7995
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