Browsing by Author "Murnira Othman"
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Item Embargo BTEX compositions and its potential health impacts in Malaysia(Elsevier, 2019) Mohd Talib Latif; Fatimah Ahamad; Md Firoz Khan; Mohd Shahrul Mohd Nadzir; Murnira Othman; Mazrura Sahani; Muhammad Ikram Abdul Wahab; Noorlin Mohamad; Royston Uning; Seng Chee Poh; Muhammad Fais Fadzil; Justin Sentian; Norhayati Md Tahir; Haris Hafizal Abd HamidThis study aims to determine the composition of BTEX (benzene, toluene, ethylbenzene and xylene) and assess the risk to health at different sites in Malaysia. Continuous monitoring of BTEX in Kuala Lumpur City Centre, Kuala Terengganu, Kota Kinabalu and Fraser Hill were conducted using Online Gas Chromatograph.Item Embargo Composition of selected heavy metals in road dust from Kuala Lumpur city centre(Springer, 2014) Nur Mun’im Mohd Han; Mohd Talib Latif; Murnira Othman; Doreena Dominick; Noorlin Mohamad; Hafizan Juahir; Norhayati Mohd TahirThis study was carried out in order to determine the concentration of heavy metals, e.g., lead (Pb), cadmium (Cd), copper (Cu), zinc (Zn), iron (Fe), manganese (Mn), nickel (Ni) and chromium (Cr) in road dust in Kuala Lumpur's city centre. Samples were collected from four sampling locations, each of which had four sampling points and three replications.Item Embargo Impact of regional haze towards air quality in Malaysia: A review(Elsevier, 2018) Mohd Talib Latif; Murnira Othman; Nurfathehah Idris; Liew Juneng; Ahmad Makmom Abdullah; Wan Portia Hamzah; Md Firoz Khan; Nik Meriam Nik Sulaiman; Jegalakshimi Jewaratnam; Nasrin Aghamohammadi; Mazrura Sahani; Chung Jing Xiang; Fatimah Ahamad; Norhaniza Amil; Mashitah Darus; Helena Varkkey; Fredolin Tangang; Abu Bakar JaafarHaze is a common phenomenon afflicting Southeast Asia (SEA), including Malaysia, and has occurred almost every year within the last few decades. Haze is associated with high level of air pollutants; it reduces visibility and affects human health in the affected SEA countries. This manuscript aims to review the potential origin, chemical compositions, impacts and mitigation strategies of haze in Malaysia.Item Embargo PM2.5 and ozone in office environments and their potential impact on human health(Elsevier, 2020) Murnira Othman; Mohd Talib Latif; Chong Zin Yee; Lina Khalida Norshariffudin; Azliyana Azhari; Nor Diana Abdul Halim; Azwani Alias; Nurzawani Md Sofwan; Haris Hafizal Abd Hamid; Yutaka MatsumiIt is important to have good indoor air quality, especially in indoor office environments, in order to enhance productivity and maintain good work performance. This study investigated the effects of indoor office activities on particulate matter of less than 2.5 μm (PM2.5) and ozone (O3) concentrations, assessing their potential impact on human health. Measurements of indoor PM2.5 and O3 concentrations were taken every 24 h during the working days in five office environments located in a semi-urban area. As a comparison, the outdoor concentrations were derived from the nearest Continuous Air Quality Monitoring Station.Item Embargo Pollution characteristics, sources, and health risk assessments of urban road dust in Kuala Lumpur City(Springer, 2020) Murnira Othman; Mohd Talib LatifUrban road dust contains anthropogenic components at toxic concentrations which can be hazardous to human health. A total of 36 road dust samples from five different urban areas, a commercial (CM), a high traffic (HT), a park (GR), a rail station (LRT), and a residential area (RD), were collected in Kuala Lumpur City followed by investigation into compositions, sources, and human health risks.Item Embargo Seasonal variation and size distribution of inorganic and carbonaceous components, source identification of size-fractioned urban air particles in Kuala Lumpur, Malaysia(Elsevier, 2022) Anas Ahmad Jamhari; Mohd Talib Latif; Muhammad Ikram A. Wahab; Hanashriah Hassan; Murnira Othman; Haris Hafizal Abd Hamid; Perapong Tekasakul; Worradorn Phairuang; Mitsuhiko Hata; Masami Furuchi; Nor Fadilah RajabThis study aims to determine the inorganic and carbonaceous components depending on the seasonal variation and size distribution of urban air particles in Kuala Lumpur. Different fractions of particulate matter (PM) were measured using a Nanosampler from 17 February 2017 until 27 November 2017. The water-soluble inorganic ions (WSIIs) and carbonaceous components in all samples were analysed using ion chromatography and carbon analyser thermal/optical reflectance, respectively.Item Embargo The exposure of children to PM2.5 and dust in indoor and outdoor school classrooms in Kuala Lumpur City Centre(Elsevier, 2019) Murnira Othman; Mohd Talib Latif; Yutaka MatsumiThis study aims to determine the concentrations of PM2.5 and dust chemical compositions in indoor and outdoor school classroom located in Kuala Lumpur City Centre. The PM2.5 concentration was measured from 19th September 2017-16th February 2018 using an optical PM2.5 sensor. Indoor and outdoor dust was also collected from the school classrooms and ion and trace metal concentrations were analysed using ion chromatography (IC) and inductively couple plasma-mass spectrometry (ICP-MS) respectively.Item Embargo The PM10 compositions, sources and health risks assessment in mechanically ventilated office buildings in an urban environment(Springer, 2015) Murnira Othman; Mohd Talib Latif; Ahmad Fariz MohamedOffice buildings can be considered a "second home" for working people and so the contribution of pollutants in this indoor environment to a person's overall exposure is significant. The aims of this study were to examine the composition of PM10 and the sources influencing the indoor and outdoor office environments. The PM10 sampling was performed using a mini-vol portable sampler at two sampling sites from May to August 2014 for daily 24 h sampling.