Browsing by Author "Nurul Bahiyah Abd Wahid"

Now showing 1 - 5 of 5
  • Thumbnail Image
    ItemUnknown
    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.
  • Thumbnail Image
    ItemUnknown
    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.
  • Thumbnail Image
    ItemUnknown
    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.
  • Thumbnail Image
    ItemUnknown
    Monsoonal variations in atmospheric surfactants at different coastal areas of the Malaysian Peninsula
    (Elsevier, 2016) Shoffian Amin Jaafar; Mohd Talib Latif; Intan Suraya Razak; Muhammad Zulhilmi Shaharudin; Md Firoz Khan; Nurul Bahiyah Abd Wahid; Suhaimi Suratman
    This study determined the effect of monsoonal changes on the composition of atmospheric surfactants in coastal areas. The composition of anions (SO42 −, NO3−, Cl−, F−) and the major elements (Ca, K, Mg, Na) in aerosols were used to determine the possible sources of surfactants. Surfactant compositions were determined using a colori-metric method as methylene blue active substances (MBAS) and disulphine blue active substances (DBAS). The anion and major element compositions of the aerosol samples were determined by ion chromatography (IC) and inductively coupled plasma mass spectrometry (ICP-MS), respectively.
  • Thumbnail Image
    ItemUnknown
    Surfactants in the sea-surface microlayer and atmospheric aerosol around the southern region of Peninsular Malaysia
    (Elsevier, 2014) Shoffian Amin Jaafar; Mohd Talib Latif; Chong Woan Chian; Wong Sook Han; Nurul Bahiyah Abd Wahid; Intan Suraya Razak; Md Firoz Khan; Norhayati Mohd Tahir
    This study was conducted to determine the composition of surfactants in the sea-surface microlayer (SML) and atmospheric aerosol around the southern region of the Peninsular Malaysia. Surfactants in samples taken from the SML and atmospheric aerosol were determined using a colorimetric method, as either methylene blue active substances (MBAS) or disulphine blue active substances (DBAS).