Browsing by Author "Wan Mohd Afiq Wan Mohd Khalik"

Now showing 1 - 6 of 6
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    A multidimensional approach for microplastics monitoring in two major tropical river basins, Malaysia
    (Elsevier, 2023) Sabiqah Tuan Anuar; Nor Salmi Abdullah; Nasehir Khan E.M Yahya; Teen Teen Chin; Ku Mohd Kalkausar Ku Yusoff; Yuzwan Mohamad; Alyza Azzura Azmi; Maisarah Jaafar; Noorlin Mohamad; Wan Mohd Afiq Wan Mohd Khalik; Yusof Shuaib Ibrahim
    Microplastics (MPs) with the size of 1 µm–5 mm are pollutants of great concern ubiquitously found in the environment. Existing efforts have found that most of the MPs present in the seas mainly originated from land via riverine inputs. Asian rivers are known to be among the top in microplastic emissions. However, field data are scarce, especially in Malaysia. This study presents the distribution and characteristics of MPs in the surface water of two major river basins of Malaysia, namely Langat River (West Coast/Straits of Malacca) and Kelantan River (East Coast/South China Sea). Water samples were collected at 21–22 locations in Kelantan and Langat rivers, covering the river, estuary and sea.
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    Assessment of multiresidue pesticides in agricultural soils from Ledang, Malaysia and related potential health risks
    (Technoscience Publications, 2018) Khitam Jaber Nabhan; Wan Mohd Afiq Wan Mohd Khalik; Md Pauzi Abdullah; Mohamed Rozali Othman; Anizan Isahak; Siti Aminah Zulkepli
    The concentration levels of organochlorine and organophosphorus pesticide residues in agriculture soils from paddy field were successfully investigated. Residues were isolated using the Soxhlet extraction method, following a clean-up process (SPE Florosil) and a final determination of targeted compounds performed by using a gas chromatography electron capture detector.
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    Caffeine residue in Terengganu river basins in Malaysia: Distribution and risk assessment
    (Technoscience Publications, 2020) Wan Mohd Afiq Wan Mohd Khalik; Saw Hong Loh; Haslina Albani; Siti Aisyah Syazwani Alias; Khaeriah Ulfah Rahman
    The occurrence of caffeine residue in Malaysian waters was successfully studied. The micropollutant abundance was recorded for three selected main rivers namely Terengganu, Ibai and Setiu which are located in Terengganu, Peninsular Malaysia. Surface water samples were taken twice in September and November 2018 from 15 sampling stations. Caffeine residue was determined using the solid phase extraction technique followed by a final analysis using a high performance liquid chromatography-UV detector.
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    Microplastics analysis in Malaysian marine waters: A field study of Kuala Nerus and Kuantan
    (Elsevier, 2018) Wan Mohd Afiq Wan Mohd Khalik; Yusof Shuaib Ibrahim; Sabiqah Tuan Anuar; Sharumathiy Govindasamy; Nor Fadilah Baharuddin
    The first report on the emergence of microplastic in Malaysian marine waters was documented in this study. Water samples were collected from two regions, namely Kuala Nerus and Kuantan port, as the representatives of different anthropogenic activities. Identification of microplastic was performed based on physical characteristics (colour, shape, density) and chemical characterisation (ATR-FTIR analysis) for a functional group of polymers.
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    Spatial distribution of heavy metals in tropical coastal sediment of the Northern Malacca Strait, Malaysia
    (Technoscience Publications, 2018) Hasrizal Shaari; Nur Sakinah Abdul Razak; Wan Mohd Afiq Wan Mohd Khalik; Noor Azhar Mohamed Shazili; Joseph Bidai
    Spatial distribution of eight heavy metals (Al, Fe, Mn, Zn, Pb, Cu, Co, Cd) in surface sediments of northern Malacca Strait were investigated. Samples were taken from 18 stations in June, 2013. The concentrations of metals ranged between 1.70-5.75% (Al), 1.13-3.19% (Fe), 117.53-323.19 µg/g (Mn), 30.14-79.42 µg/g (Zn), 8.88-29.28 µg/g (Pb), 3.51-16.58 µg/g (Cu), 2.16-5.93 µg/g (Co) and 0.00- 0.50 µg/g (Cd).
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    Spatiotemporal microplastic occurrence study of Setiu Wetland, South China Sea
    (Elsevier, 2021) Yusof Shuaib Ibrahim; Siti Rabaah Hamzah; Wan Mohd Afiq Wan Mohd Khalik; Ku Mohd Kalkausar Ku Yusof; Sabiqah Tuan Anuar
    This study reports the distribution of microplastics (MPs) in surface water and estuarine sediments in South and North Setiu Wetland in the South China Sea. Sampling was conducted bimonthly for one year from November 2016 to November 2017, including the northeast and southwest monsoons. Water surface and sediment samples were collected from six different sampling stations (STs). Samples were sorted based on physical analysis (optical observation) and selected particles were further analyzed by chemical characterizations.