Browsing by Author "Nurul Adyani Ghazali"

Now showing 1 - 6 of 6
  • Thumbnail Image
    ItemEmbargo
    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.
  • Thumbnail Image
    ItemEmbargo
    Diurnal fluctuations of ozone concentrations and its precursors and prediction of ozone using multiple linear regressions
    (Environmental Management Society Malaysia, 2010) Nor Azam Ramli; Nurul Adyani Ghazali; Ahmad Shukri Yahaya
    The chemical reaction of pollutants emitted into the atmosphere leads to a variety of oxidized products, which are commonly referred to as secondary pollutants. Ground level ozone is a known secondary photochemical pollutant of major importance possessing detrimental effects on health, agriculture, natural/urban ecosystems and materials. Ozone (O3) can irritate lung airways and cause inflammation much like sunburn. Hourly and monthly variations of O3 and their precursors-nitrogen oxides (NOx) and meteorological parameters (temperature and wind speed) were presented using time series plots.
  • Thumbnail Image
    ItemEmbargo
    Level of benzene concentrations emitted from motor vehicles in various sites in Nibong Tebal, Malaysia
    (Springer, 2011) Wesam Ahmed Al Madhoun; Nor Azam Ramli; Ahmad Shukri Yahaya; Noor Faizah Fitri Md Yusuf; Nurul Adyani Ghazali; Nurulilyana Sansuddin
    Benzene is classified as carcinogenic compound which is emitted mainly from cars. In this study, benzene was measured at various sites in Nibong Tebal (urban, suburban, town, and rural) of different traffic volume, and traffic counts were performed simultaneously. Monitoring was carried out during the morning and afternoon traffic peaks. The aim of this study is to monitor benzene concentration at several development sites with different traffic flow. The monitoring was done by using indoor air quality meter.
  • Thumbnail Image
    ItemEmbargo
    Monsoonal differences and probability distribution of PM10 concentration
    (Elsevier, 2010) Noor Faizah Fitri Md Yusof; Nor Azam Ramli; Ahmad Shukri Yahaya; Nurulilyana Sansuddin; Nurul Adyani Ghazali; Wesam al Madhoun
    There are many factors that influence PM10 concentration in the atmosphere. This paper will look at the PM10 concentration in relation with the wet season (north east monsoon) and dry season (south west monsoon) in Seberang Perai,Malaysia from the year 2000 to 2004. It is expected that PM10 will reach the peak during south west monsoon as the weather during this season becomes dry and this study has proved that the highest PM10 concentrations in 2000 to 2004 were recorded in this monsoon.
  • Thumbnail Image
    ItemEmbargo
    Statistical analysis of PM10 concentrations at different locations in Malaysia
    (Elsevier, 2011) Nurulilyana Sansuddin; Nor Azam Ramli; Ahmad Shukri Yahaya; Noor Faizah Fitri MD Yusof; Nurul Adyani Ghazali; Wesam Ahmed Al Madhoun
    Malaysia has experienced several haze events since the 1980s as a consequence of the transboundary movement of air pollutants emitted from forest fires and open burning activities. Hazy episodes can result from local activities and be categorized as "localized haze". General probability distributions (i.e., gamma and log-normal) were chosen to analyze the PM10 concentrations data at two different types of locations in Malaysia: industrial (Johor Bahru and Nilai) and residential (Kota Kinabalu and Kuantan).
  • Thumbnail Image
    ItemEmbargo
    Time effects of high particulate events on the critical conversion point of ground-level ozone
    (Elsevier, 2018) Norrimi Rosaida Awang; Nor Azam Ramli; Syabiha Shith; Noor Faizah Fitri Md Yusof; Nazatul Syadia Zainordin; Nurulilyana Sansuddin; Nurul Adyani Ghazali
    Particulate matter (PM), especially those with an aerodynamic particle size of less than 10 μm (PM10), is typically emitted from transboundary forest fires. A large-scale forest fire may contribute to a haze condition known as a high particulate event (HPE), which has affected Southeast Asia, particularly Peninsular Malaysia, for a long time. Such event can alter the photochemical reactions of secondary pollutants. This work investigates the influence of PM on ground-level ozone (O3) formation during HPE. Five continuous air quality monitoring stations from different site categories (i.e., industrial, urban and background) located across Peninsular Malaysia were selected in this study during the HPEs in 2013 and 2014.