Browsing by Author "Che Abd Rahim Mohamed"
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Item Embargo Characterization, distribution, sources and origins of aliphatic hydrocarbons from surface sediment of Prai Strait, Penang, Malaysia: A widespread anthropogenic input(Thai Society of Higher Eduation Institutes on Environment, 2008) Mahyar Sakari; Mohamad Pauzi Zakaria; Nordin Hj Lajis; Che Abd Rahim Mohamed; Pourya Shahpoury Bahry; Sofia Anita; Kuhan ChandrugPersistent organic pollutants such as petroleum hydrocarbons are one of the most serious and important class of pollutants that face to many countries including Malaysia. Aliphatic hydrocarbons contain straight chain alkane; derive from anthropogenic and natural sources to the marine environment. The multi-purpose strait of Prai is located in the Northwest of Peninsular Malaysia plays an important economic role in the Southeast Asia. Twenty surface sediment samples were collected using Eckman dredge to measure the concentration and determine the characterization, sources and origins of the aliphatic hydrocarbons in December 2006. Samples (top 4 cm) were extracted with Soxhlet, treated with activated copper and subjected to 2 steps column chromatography for purification and fractionation. Alkane fraction injected into Gas Chromatography-Flame Ionization Detector (GC-FID) for instrumental analysis.Item Embargo Geochemical assessment and spatial distributions of trace elements in the surface sediments of the Strait of Malacca(Thai Society of Higher Eduation Institutes on Environment, 2022) Mohamad Arif Che Abd Rahim; Shengfa Liu; Xuefa Shi; Che Abd Rahim MohamedThe Strait of Malacca is one of the major shipping routes in naval logistics linking Indian and Pacific Oceans, which later these activities contributed to the trace metal accumulation in the Strait of Malacca. To assess the source of geochemical elements along with several factors affecting the concentrations in the surface sediments, five surface sediments were collected for physiochemical studies along the Strait of MalaccaItem Restricted High 210Po activity concentration in the surface water of Malaysian seas driven by the dry season of the southwest monsoon (June-August 2009)(Springer, 2015) Asnor Azrin Sabuti; Che Abd Rahim MohamedSurface seawater was collected using a high-volume water pump in Malaysian waters during the first Prime Scientific Sailing Expedition in 2009 to obtain activity levels of lead-210 (210Pb) and polonium-210 (210Po).Item Metadata only Kepekatan Mn dan Fe dalam Teras Sedimen diPerairan Sarawak dan Sabah(Penerbit UKM) Che Abd Rahim Mohamed; Zaharudin Ahmad; Zal U'yun Wan MahmoodItem Embargo Natural radionuclide of Po210 in the edible seafood affected by coal-fired power plant industry in Kapar coastal area of Malaysia(BioMed Central Ltd, 2011) Lubna Alam; Che Abd Rahim MohamedPo210 can be accumulated in various environmental materials, including marine organisms, and contributes to the dose of natural radiation in seafood. The concentration of this radionuclide in the marine environment can be influenced by the operation of a coal burning power plant but existing studies regarding this issue are not well documented. Therefore, the aim of this study was to estimate the Po210 concentration level in marine organisms from the coastal area of Kapar, Malaysia which is very near to a coal burning power plant station and to assess its impact on seafood consumers.Item Embargo Natural uranium and thorium isotopes in sediment cores off Malaysian ports(Springer, 2015) Abdul Hafidz Yusoff; Asnor Azrin Sabuti; Che Abd Rahim MohamedSediment cores collected from three Malaysian marine ports, namely, Kota Kinabalu, Labuan and Klang were analyzed to determine the radioactivities of 234U, 238U, 230Th, 232Th and total organic carbon (TOC) content. The objectives of this study were to determine the factors that control the activity of uranium isotopes and identify the possible origin of uranium and thorium in these areas.Item Embargo Non-carcinogenic health risk assessment of aluminium ingestion via drinking water in Malaysia(Springer, 2019) Minhaz Farid Ahmed; Mazlin Bin Mokhtar; Lubna Alam; Che Abd Rahim Mohamed; Goh Choo TaExposure to aluminium (Al) is inevitable in the daily life because of its abundance in the environmental media through natural processes. Meanwhile, several studies have reported a positive association between Alzheimer’s disease and a higher level of Al ingestion through drinking water. The present study is the first of its kind in Malaysia which predicts the human health risk of Al ingestion via drinking water at the Langat River Basin, Malaysia.Item Restricted Partitioning of 232Th, 230Th and 228Th in the Surface Water of Northwest Peninsular Malaysia Coastal Waters as Tracer for SPM Sources(Thai Society of Higher Education Institutes on Environment, 2017) Nor Faizah MMK Noorulhudha; Che Abd Rahim MohamedNatural thorium radioisotopes (232Th, 230Th, 228Th, 234Th) are well known to be particle reactive, thus they are often used to study the geochemical process of particle reactive matter. In this study, water samples were collected from Langkawi Island and Pangkor Island from six and ten sampling stations respectively, to determine the activity of 232Th, 230Th and 228Th in dissolved (DISS) and suspended particulate matter (SPM) phases, and estimate the sources and origin of SPM into the marine environment.+J67Item Metadata only Sedimentation rate of trace elements in the surface sediment of the South China Sea(Penerbit UKM) Che Abd Rahim Mohamed; Noor Azhar Mohamed ShaziliItem Restricted Surfactants in the sea-surface microlayer and their contribution to atmospheric aerosols around coastal areas of the Malaysian peninsula(Elsevier, 2010) Razarul Naim Roslan; Norfazrin Mohd Hanif; Mohamed Rozali Othman; Wan Nurul Farah Wan Azmi; Xan Xue Yan; Masni Mohd Ali; Che Abd Rahim Mohamed; Mohd Talib LatifA study was done to determine the concentrations of surfactants on the sea-surface microlayer and in atmospheric aerosols in several coastal areas around the Malaysian peninsula. The concentrations of surfactants from the sea-surface microlayer (collected using rotation drum) and from aerosols (collected using HVS) were analyzed as methylene blue active substances and disulphine blue active substances through the colorimetric method using a UV-vis spectrophotometer.Item Restricted The history of petroleum pollution in Malaysia; urgent need for integrated prevention approach(Thai Society of Higher Education Institutes on Environment, 2010) Mahyar Sakari; Mohamad Pauzi Zakaria; Che Abd Rahim Mohamed; Nordin Haji Lajis; Kuhan Chandru; Pourya Shahpoury Bahry; Mohammadreza Mohammad Shafiee; Sofia AnitaPetroleum pollution is known as point and non-point source of contaminations in the environment. A major class of petroleum contaminant is groups of compounds consist of two or more fused benzene rings called polycyclic aromatic hydrocarbons (PAHs) that are carcinogenic, mutagenic and toxic. Source identification of petroleum pollution is necessary to prevent pollution entry into the environment. Eight sedimentary cores were obtained from developed and developing areas around Peninsular Malaysia to investigate the historical profile of PAHs, their characteristics and its possible origins.Item Metadata only Variasi Profil 210 Po dan 210Pb dalam Teras Sedimen di Pesisir Pantai Perairan Sarawak(Penerbit UKM) Che Abd Rahim Mohamed; Zaharudin Ahmad; Zal U'Yun Wan Mahmood