Aliphatic and polycyclic aromatic hydrocarbons in sediment from Brunei Bay

Sixteen core sediment samples, collected from Brunei Bay were analyzed for aliphatic and polycyclic aromatic hydrocarbons (pAHs). These hydrocarbons were recovered from core sediment by Soxhlet extraction and then analyzed using gas chromatography equipped with flame ionization detector (GCIFID). C...

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Main Author:	Mohd Khairil, Said
Format:	Thesis
Language:	English
Published:	2005
Subjects:	Q Science (General) QD Chemistry
Online Access:	http://ir.unimas.my/id/eprint/28769/2/Mohd%20Khairil.pdf
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id	my-unimas-ir.28769
record_format	uketd_dc
spelling	my-unimas-ir.287692023-03-31T08:41:51Z Aliphatic and polycyclic aromatic hydrocarbons in sediment from Brunei Bay 2005 Mohd Khairil, Said Q Science (General) QD Chemistry Sixteen core sediment samples, collected from Brunei Bay were analyzed for aliphatic and polycyclic aromatic hydrocarbons (pAHs). These hydrocarbons were recovered from core sediment by Soxhlet extraction and then analyzed using gas chromatography equipped with flame ionization detector (GCIFID). Concentrations of heavy metals were measured using atomic adsorption spectrophotometer (AAS) and used as supplementary data. Total concentrations of aliphatic hydrocarbons and PAHs in core sediment of Brunei Bay ranged from 14.5 - 225.2 ~/g dry weight and 0.11 . 4.75J.l gig dry weight, respectively. Generally, hydrocarbon concentrations were found to be relatively high at the first two layer compared to the concentrations in the deeper layer of sediment, suggesting increasing hydrocarbons input in more recent times. Several molecular indices and distribution patterns were used to predict the predominant sources of hydrocarbons. Petrogenic hydrocarbons were abundant in Labuan Island sediments, where intense petrochemical, harbor shipping and fisheries activities occurred. Petrogenic and pyrolytic hydrocarbons were dominant at the Open Sea and Lawas core sediment. Pyrolytic and biogenic hydrocarbons were more abundant in sediment from Padas estuary. Chemometric approaches (e.q. simple correlation analysis, principal component analysis (peA) and cluster analysis) were applied to investigate the fate and dispersal pathway of the pollutant in the sediment from Brunei Bay. Result clearly showed that the hydrocarbon often originated from land-based input, particularly from the Labuan Island, Lawas and Padas Rivers, while atmospheric input is the dominant pathway at the Open Sea sediment. Universiti Malaysia Sarawak (UNIMAS) 2005 Thesis http://ir.unimas.my/id/eprint/28769/ http://ir.unimas.my/id/eprint/28769/2/Mohd%20Khairil.pdf text en validuser masters Universiti Malaysia Sarawak (UNIMAS) Faculty of Resource Science and Technology
institution	Universiti Malaysia Sarawak
collection	UNIMAS Institutional Repository
language	English
topic	Q Science (General) QD Chemistry
spellingShingle	Q Science (General) QD Chemistry Mohd Khairil, Said Aliphatic and polycyclic aromatic hydrocarbons in sediment from Brunei Bay
description	Sixteen core sediment samples, collected from Brunei Bay were analyzed for aliphatic and polycyclic aromatic hydrocarbons (pAHs). These hydrocarbons were recovered from core sediment by Soxhlet extraction and then analyzed using gas chromatography equipped with flame ionization detector (GCIFID). Concentrations of heavy metals were measured using atomic adsorption spectrophotometer (AAS) and used as supplementary data. Total concentrations of aliphatic hydrocarbons and PAHs in core sediment of Brunei Bay ranged from 14.5 - 225.2 ~/g dry weight and 0.11 . 4.75J.l gig dry weight, respectively. Generally, hydrocarbon concentrations were found to be relatively high at the first two layer compared to the concentrations in the deeper layer of sediment, suggesting increasing hydrocarbons input in more recent times. Several molecular indices and distribution patterns were used to predict the predominant sources of hydrocarbons. Petrogenic hydrocarbons were abundant in Labuan Island sediments, where intense petrochemical, harbor shipping and fisheries activities occurred. Petrogenic and pyrolytic hydrocarbons were dominant at the Open Sea and Lawas core sediment. Pyrolytic and biogenic hydrocarbons were more abundant in sediment from Padas estuary. Chemometric approaches (e.q. simple correlation analysis, principal component analysis (peA) and cluster analysis) were applied to investigate the fate and dispersal pathway of the pollutant in the sediment from Brunei Bay. Result clearly showed that the hydrocarbon often originated from land-based input, particularly from the Labuan Island, Lawas and Padas Rivers, while atmospheric input is the dominant pathway at the Open Sea sediment.
format	Thesis
qualification_level	Master's degree
author	Mohd Khairil, Said
author_facet	Mohd Khairil, Said
author_sort	Mohd Khairil, Said
title	Aliphatic and polycyclic aromatic hydrocarbons in sediment from Brunei Bay
title_short	Aliphatic and polycyclic aromatic hydrocarbons in sediment from Brunei Bay
title_full	Aliphatic and polycyclic aromatic hydrocarbons in sediment from Brunei Bay
title_fullStr	Aliphatic and polycyclic aromatic hydrocarbons in sediment from Brunei Bay
title_full_unstemmed	Aliphatic and polycyclic aromatic hydrocarbons in sediment from Brunei Bay
title_sort	aliphatic and polycyclic aromatic hydrocarbons in sediment from brunei bay
granting_institution	Universiti Malaysia Sarawak (UNIMAS)
granting_department	Faculty of Resource Science and Technology
publishDate	2005
url	http://ir.unimas.my/id/eprint/28769/2/Mohd%20Khairil.pdf
_version_	1783728361246294016

Aliphatic and polycyclic aromatic hydrocarbons in sediment from Brunei Bay

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