Browsing by Author "Marzuki Ismail"

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    A ten-year investigtion on ozone and it precursors at Kemaman, Terengganu, Malaysia
    (Thai Society of Higher Eduation Institutes on Environment, 2016) Marzuki Ismail; Samsuri Abdullah; Fong Si Yuen; Nurul Adyani Ghazali
    10 years of continuous monitoring data (2000-2010) from Air Quality Division, Malaysian Department of Environment are used to investigate the relationships between ambient levels of ozone (O3), nitric oxide (NO) and nitrogen dioxide (NO2) as a function of NOx, in Kemaman, Malaysia, wherewith the dominant sources of ozone precursors are industrial activities and road traffic. In addition, variation of oxidant OX (O3 and NO2) concentration with NOx was also examined.
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    Air quality status during 2020 Malaysia Movement Control Order (MCO) due to 2019 novel coronavirus (2019-nCoV) pandemic
    (Elsevier, 2020) Samsuri Abdullah; Amalina Abu Mansor; Nur Nazmi Liyana Mohd Napi; Wan Nurdiyana Wan Mansor; Ali Najah Ahmed; Marzuki Ismail; Zamzam Tuah Ahmad Ramly
    An outbreak of respiratory illness which is proven to be infected by a 2019 novel coronavirus (2019-nCoV) officially named as Coronavirus Disease 2019 (COVID-19) was first detected in Wuhan, China and has spread rapidly in other parts of China as well as other countries around the world, including Malaysia. The first case in Malaysia was identified on 25 January 2020 and the number of cases continue to rise since March 2020. Therefore, 2020 Malaysia Movement Control Order (MCO) was implemented with the aim to isolate the source of the COVID-19 outbreak. As a result, there were fewer number of motor vehicles on the road and the operation of industries was suspended, ergo reducing emissions of hazardous air pollutants in the atmosphere. We had acquired the Air Pollutant Index (API) data from the Department of Environment Malaysia on hourly basis before and during the MCO with the aim to track the changes of fine particulate matter (PM2.5) at 68 air quality monitoring stations.
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    Indoor air quality in selected samples of primary schools in Kuala Terengganu, Malaysia
    (Thai Society of Higher Eduation Institutes on Environment, 2010) Marzuki Ismail; Nur Zafirah Mohd Sofian; Ahmad Makmon Abdullah
    Studies have found out that indoor air quality affects human especially children and the elderly more compared to ambient atmospheric air. This study aims to investigate indoor air pollutants concentration in selected vernacular schools with different surrounding human activities in Kuala Terengganu, the administrative and commercial center of Terengganu state. Failure to identify and establish indoor air pollution status can increase the chance of long-term and short-term health problems for these young students and staff; reduction in productivity of teachers; and degrade the youngsters learning environment and comfort. Indoor air quality (IAQ) parameters in three primary schools were conducted during the monsoon season of November 2008 for the purposes of assessing ventilation rates, levels of particulate matter (PM10) and air quality differences between schools. In each classroom, carbon monoxide (CO), CO2 , air velocity, relative humidity and temperature were performed during school hours, and a complete walkthrough survey was completed.
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    Indoor-Outdoor Air Quality Assessment in Nurseries
    (IOP Publishing, 2020) Amalina Abu Mansor; Ain Natasha Badrul Hisham; Samsuri Abdullah; Nur Nazmi Liyana Mohd Napi; Ali Najah Ahmed; Marzuki Ismail
    Poor Indoor Air Quality (IAQ) can adversely affect children�s health, comfort and school performance. This study mainly aimed to assess indoor and outdoor air quality status in terms of physical and chemical aspects at nurseries of two higher public institutions. The monitored parameters are temperature (T), relative humidity (RH), air movement (AM), particulate matter (PM), carbon dioxide (CO2) and carbon monoxide (CO) by using Climomaster (RH, T, AM), Dust Trax� (RSP) and Kanomax IAQ (CO, CO2). The measurement was taken continuously in a period of three days at two nurseries of public institutions.
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    Seasonal and long term variations of surface ozone concentrations in Malaysian Borneo
    (Elsevier, 2016) Mohd Talib Latif; Doreena Dominick; Fatimah Ahamad; Nur Shuhada Ahamad; Md Firoz Khan; Liew Juneng; Chung Jing Xiang; Mohd Shahrul Mohd Nadzir; Andrew D. Robinson; Marzuki Ismail; Mohammed Iqbal Mead; Neil R.P. Harris
    Malaysian Borneo has a lower population density and is an area known for its lush rainforests. However, changes in pollutant profiles are expected due to increasing urbanisation and commercial-industrial activities. This study aims to determine the variation of surface O3 concentration recorded at seven selected stations in Malaysian Borneo. Hourly surface O3 data covering the period 2002 to 2013, obtained from the Malaysian Department of Environment (DOE), were analysed using statistical methods.