Browsing by Author "Mohd Talib Latif"

Now showing 1 - 20 of 58
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    Air pollution and cardiorespiratory hospitalization, predictive modeling, and analysis using artificial intelligence techniques
    (Springer, 2021) Raja Sher Afgun Usmani; Thulasyammal Ramiah Pillai; Ibrahim Abaker Targio Hashem; Mohsen Marjani; Rafiza Shaharudin; Mohd Talib Latif
    This study aims to investigate the association between cardiorespiratory hospitalization and air pollution, and predict cardiorespiratory hospitalization based on air pollution using the artificial intelligence (AI) techniques.
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    Airborne particles in the city center of Kuala Lumpur: Origin, potential driving factors, and deposition flux in human respiratory airways
    (Elsevier, 2019) Md Firoz Khan; Ahmad Hazuwan Hamid; Md Aynul Bari; Abdul Basit Ahmad Tajudin; Mohd Talib Latif; Mohd Shahrul Mohd Nadzir; Mazrura Sahani; Muhammad Ikram A. Wahab; Yusri Yusup; Khairul Nizam Abdul Maulud; Mohd Famey Yusoff; Nowshad Amin; Md Akhtaruzzaman; Warren Kindzierski; Prashant Kumar
    Equatorial warming conditions in urban areas can influence the particle number concentrations (PNCs), but studies assessing such factors are limited. The aim of this study was to evaluate the level of size-resolved PNCs, their potential deposition rate in the human respiratory system, and probable local and transboundary inputs of PNCs in Kuala Lumpur.
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    Ambient BTEX levels over urban, suburban and rural areas in Malaysia
    (Springer, 2019) Haris Hafizal Abd Hamid; Mohd Talib Latif; Mohd Shahrul Mohd Nadzir; Royston Uning; Md Firoz Khan; Narayanan Kannan
    Benzene, toluene, ethylbenzene and xylene isomers (BTEX) are volatile organic air pollutants of concern which arise from natural and anthropogenic sources. This study aims to determine and evaluate the BTEX levels in ambient air in selected areas of Malaysia, namely: Kuala Lumpur (KL-urban), Penang (PG-urban), Bangi (BG-suburban), Langkawi (LGK-suburban) and the Danum Valley (DV-rural). Active sampling with sorbent tubes was applied in this study and samples were analysed using thermal desorption (TD) coupled with gas chromatography-mass spectrometry (GC-MS).
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    Anionic surfactants and traffic related emission from an urban area of Perak, Malaysia
    (Springer, 2019) Helmiah Abdul Razak; Nurul Bahiyah Abd Wahid; Mohd Talib Latif
    Anionic surfactants are one of the pollutants derived from particulate matter (PM) and adversely affect the health of living organisms. In this study, the compositions of surfactants extracted from PM and vehicle soot collected in an urban area were investigated. A high-volume air sampler was used to collect PM sample at urban area based on coarse (> 1.5 µm) and fine (< 1.5 µm) mode particles. Meanwhile, the vehicle soot was collected randomly from the exhaust pipe of various types of diesel and petrol vehicles using a soft brush during dry days. The concentration of anionic surfactants, such as Methylene Blue Active Substances (MBAS), was determined by the colorimetric method using UV–Vis Spectrophotometer. Morphological properties of the PM and exhaust soot sample was studied using feld-emission scanning electron microscope.
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    Assessment on the distributions and exchange of anionic surfactants in the coastal environment of Peninsular Malaysia: A review
    (Springer, 2022) Royston Uning; Suhaimi Suratman; Mohd Talib Latif; Nur Ili Hamizah Mustaffa
    Terrestrial anionic surfactants (AS) enter the marine environment through coastal region. Despite that, in general limited knowledge is available on the coastal AS transfer pathway. This paper aims to assess the distributions and exchange of AS in the Peninsular Malaysia coastal environments, adjacent to the southern waters of South China Sea and Strait of Malacca.
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    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 Hamid
    This 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.
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    Characterization and source profiling of volatile organic compounds in indoor air of private residences in Selangor State, Malaysia
    (Elsevier, 2017) Nobumitsu Sakai; Shuta Yamamoto; Yasuto Matsui; Md Firoz Khan; Mohd Talib Latif; Mustafa Ali Mohd; Minoru Yoneda
    Volatile Organic Compounds (VOCs) in indoor air were investigated at 39 private residences in Selangor State, Malaysia to characterize the indoor air quality and to identify pollution sources. Twenty-two VOCs including isomers (14 aldehydes, 5 aromatic hydrocarbons, acetone, trichloroethylene and tetrachloroethylene) were collected by 2 passive samplers for 24 h and quantitated using high performance liquid chromatography and gas chromatography mass spectrometry. Source profiling based on benzene/toluene ratio as well as statistical analysis (cluster analysis, bivariate correlation analysis and principal component analysis) was performed to identify pollution sources of the detected VOCs.
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    Composition and distribution of surfactants around Lake Chini, Malaysia
    (Springer, 2012) Mohd Talib Latif; Lim Wanfi; Norfazrin Mohd Hanif; Razarul Naim Roslan; Masni Mohd Ali; Idris Mushrifah
    This study aims to determine the composition of surfactants in the lake surface microlayer, rainwater, and atmospheric aerosols in the area surrounding Lake Chini, Pahang. Surfactants in the lake surface microlayer were taken from seven different stations around the lake, while samples of rainwater were taken from five different sampling stations. The samples of atmospheric aerosols were collected from the Lake Chini Research Centre which is in close proximity to the lake.
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    Composition and source apportionment of surfactants in atmospheric aerosols of urban and semi-urban areas in Malaysia
    (Elsevier, 2013) Nurul Bahiyah Abd Wahid; Mohd Talib Latif; Suhaimi Suratman
    This study was conducted to determine the composition and source apportionment of surfactant in atmospheric aerosols around urban and semi-urban areas in Malaysia based on ionic compositions. Colorimetric analysis was undertaken to determine the concentrations of anionic surfactants as Methylene Blue Active Substances (MBAS) and cationic surfactants as Disulphine Blue Active Substances (DBAS) using a UV spectrophotometer.
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    Composition of heavy metals in indoor dust and their possible exposure: A case study of preschool children in Malaysia
    (Springer, 2013) Mohd Talib Latif; Saw Mei Yong; Azlina Saad; Noorlin Mohamad; Nor Hafizah Baharudin; Mazlin Bin Mokhtar; Norhayati Mohd Tahir
    The aim of this study is to determine the levels of selected heavy metals (Pb, Zn, Cd, Fe and Cr) at ten preschools in Selangor, Malaysia. Dust samples from the interior of classrooms and surface soils were collected using soft paint brushes while Kimwipes were used to collect samples of dust from interior walls and children's palms. Heavy metals in the dust samples were determined using inductively coupled plasma mass spectrometry (ICP-MS).
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    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 Tahir
    This 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.
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    Concentration and source apportionment of volatile organic compounds (VOCs) in the ambient air of Kuala Lumpur, Malaysia
    (Springer, 2017) Puteri Nurafidah Hosaini; Md Firoz Khan; Nur Ili Hamizah Mustaffa; Norhaniza Amil; Noorlin Mohamad; Shoffian Amin Jaafar; Mohd Shahrul Mohd Nadzir; Mohd Talib Latif
    The accumulation of volatile organic compounds (VOCs) in ambient air affects air quality through the generation of surface level ozone and secondary organic aerosol. A study of the distribution and source apportionment of VOCs was conducted at two stations to investigate the air quality status of Kuala Lumpur. Samples of ambient air were collected into Tedlar sampling bags using an air sampling pump and then pre-concentrated with solid-phase micro-extraction fibre. Gas chromatography-mass spectrometry (GC-MS) was employed to measure the VOC species.
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    Concentration and source identification of polycyclic aromatic hydrocarbons (PAHs) in PM10 of urban, industrial and semi-urban areas in Malaysia
    (Elsevier, 2014) Anas Ahmad Jamhari; Mazrura Sahani; Mohd Talib Latif; Kok Meng Chan; Hock Seng Tan; Md Firoz Khan; Norhayati Mohd Tahir
    Particulate matter (PM10) associated with polycyclic aromatic hydrocarbons (PAHs) in ambient air were determined at two sites within the Klang Valley, Kuala Lumpur (urban, KL) and Petaling Jaya (industrial, PJ), and one site outside the Klang Valley, Bangi (semi-urban, BG). This study aimed to determine the concentration and distribution of PAHs in PM10 and the source of origin through principal component analysis (PCA) and diagnostic ratio analysis.
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    Distribution of surfactants along the estuarine area of Selangor River, Malaysia
    (Elsevier, 2014) Murad Ali Alsalahi; Mohd Talib Latif; Masni Mohd Ali; Sami Muhsen Magam; Nurul Bahiyah Abd Wahid; Md Firoz Khan; Suhaimi Suratman
    This study aims to determine the levels of methylene blue active substances (MBAS) and ethyl violet active substances (EVAS) as anionic surfactants and of disulphine blue active substances (DBAS) as cationic surfactants in the surface microlayer (SML) around an estuarine area using colorimetric methods.
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    Distribution of surfactants in the sea surface microlayer and sub-surface water in the Melaka River Estuary
    (Springer, 2019) Leonie Jaeger; Royston Uning; Norfazrin Mohd Hanif; Mohd Talib Latif
    This study determines the levels of surfactants at 12 stations located in the Melaka River Estuary. This river estuary is located within a tourism area of Melaka Historical City.
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    El Niño driven haze over the Southern Malaysian Peninsula and Borneo
    (Elsevier, 2020) Md Firoz Khan; Ahmad Hazuwan Hamid; Haasyimah Ab Rahim; Khairul Nizam Abdul Maulud; Mohd Talib Latif; Mohd Shahrul Mohd Nadzir; Mazrura Sahani; Kai Qin; Prashant Kumar; Helena Varkkey; Mohammad Rashed Iqbal Faruque; Ng Chee Guan; Seyedeh Parisa Ahmadi; Sumiani Yusoff
    The Southeast Asian (SEA) region is no stranger to forest fires - the region has been suffering from severe air pollution (known locally as "haze") as a result of these fires, for decades. The fires in SEA region are caused by a combination of natural (the El Niño weather pattern) and manmade (slash-and-burn and land clearing for plantations) factors. These fires cause the emissions of toxic aerosols and pollutants that can affect millions of people in the region. Thus, this study aims to identify the impact of the SEA haze on the Southern region of the Malaysian Peninsula and Borneo region of East Malaysia using the entire air quality observation data at surface level in 2015.
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    Factors influencing the variations of PM10 aerosol dust in Klang Valley, Malaysia during the summer
    (Elsevier, 2011) Liew Juneng; Mohd Talib Latif; Fredolin Tangang
    The associations between the variations of PM10 concentration during summer monsoon dry seasons over the Klang Valley, Malaysia and the local meteorological factors, synoptic weather conditions as well as the regional hotspots number were examined based on simple multiple linear regression analysis. The regressive relationships established, suggest that the variation of PM10 in Klang Valley was governed significantly by all of the examined factors. Local meteorological conditions are among those factors which governed the largest day-to-day variations of PM10 concentration in the Klang Valley areas during the dry season.
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    Fluctuations in nighttime ground-level ozone concentrations during haze events in Malaysia
    (Springer, 2020) Syabiha Shith; Norrimi Rosaida Awang; Mohd Talib Latif; Nor Azam Ramli
    This study focused on O3 variations and the titration effects of NOx during nighttime at urban, industrial, sub-urban and background sites. Nighttime O3 concentration variations and the presence of high particles with an aerodynamic diameter of less than 10 μm (PM10) were examined because haze disturbs the photochemical reactions of O3. Hourly data on O3, NO2, NO and PM10 concentrations provided by the Air Quality Division of the Department of Environment were divided into two groups of daytime and nighttime and analysed.
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    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 Jaafar
    Haze 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.
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    Interaction of PM10 concentrations with local and synoptic meteorological conditions at different temporal scales
    (Elsevier, 2020) Hanashriah Hassan; Mohd Talib Latif; Liew Juneng; Norhaniza Amil; Md Firoz Khan; Diong Jeong Yik; Nur Aleesha Abdullah
    Changing meteorological conditions over short and long time scales are anticipated to affect the concentrations of particulate matter with aerodynamic diameter below than 10 μm (PM10) in the atmosphere. This study aims to identify the temporal characteristics of PM10 including its relationship with local and synoptic meteorological conditions in Petaling Jaya (PJ), Malaysia from 1996 to 2016.A high volume sampler (HVS), mounted on the rooftop of MetMalaysia, was used to monitor daily PM10 concentrations. The meteorological parameter data were obtained from the MetMalaysia PJ station.