Ozone Formation in the Urban Environment of Alexandria during Summer Months | ||
| Journal of High Institute of Public Health | ||
| Article 11, Volume 32, Issue 1, January 2002, Pages 171-180 | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jhiph.2002.219747 | ||
| Author | ||
| Mahmoud F. Mohamed | ||
| Department of Occupational Health, High Institute of Public Health, Alexandria University, Egypt | ||
| Abstract | ||
| Elevated levels of ozone [O3] are becoming a cause of global concern. Ozone in the troposphere near the ground is damaging to plants and materials and harmful to human health. This study was aimed to evaluate level of tropospheric ozone and its precursors and to study the different factors leading to O3 exceeding levels. Ambient concentrations of O3, nitrogen dioxide [NO2] and volatile organic compounds [VOCs] were measured during the summer months of year 2000 at different locations in Alexandria City. Maximum concentrations of O3 was obtained during the afternoon period of the day because of the photochemical oxidation process in the presence of ultraviolet solar radiation and high levels of O3-forming pollutants. During weekends, levels of O3 were lower than that during weekdays at all sampling sites. It was found that activity of an area and its nature has a considerable role in the formation of tropospheric O3 and its precursors. All levels of O3 either obtained during the noon rush hour period or during weekdays were below the recommended exposure standards [120 µg/m³] as set in the Egyptian Environmental Law No.4 for 1994. | ||
| Keywords | ||
| Ozone Formation; Urban Environment; Alexandria; Summer Months | ||
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