الفهرس 
AcknowledgementOnly 14 pages are availabe for public view
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Abstract
This study was directed towards the comparison between total suspended particulates and respirable particulates and its orqanic contents(benzene soluble organic matter) and inorganic contents (sulfate, nitrate, and chloride) in the City of Alexandria during the period from January up to December 1983. This investigation includes an introduction to total suspended particulatesand respirable particulates, their chemical and physical properties. Also the gases and its classification, the main sources of air pollutants, and the meteorological data during this period. The sampling station was chosen to be the roof of the Occupational Research Building in Semouha. Total suspended particulate was collected by a high volume sampler while the respirable particulate was collected by a horizontal elutriator. Samples were collected for 24 hours at air flow rates ranging from 40 to 50 cfm for total suspended particulate and. 40 L/min for respirable part iculate. The concentration of particulate was determined and analyzed for some of its organic constituents such as benzene soluble organic matter, and inorganic constituents such as sulfate, nitrate and chloride. The total suspended particulates concent~ation reached an average 3 of 128 ug/m . While the respirable particulates concentration reached an 3 average of 106 ug/m . , Particulates concentration was found to vary in the different months ~ according to wind speed and direction where it was found to be inversely proportion to wind speed. The highest particulates concentration was found in November and December and the lowest concentration was found in June. The highest percentage for sulfate was found in Summer (14.5 for total suspenrled particulate , and 14.9 for respirable particulates).. The lowest was in Spring (9.6 for total suspended particulates and 10.2 fQr respirable particulates).Average sulfate concentration wa~ 15.2 ug/m3 in total suspended particulates and 13.4 ug/m3 in respirable particulates and these represent 12.0 and 12.6 respectively. Per cent of sulfate in respirable particulates was found to be higher than in total suspended particulates. With respect to nitrate, it was found to be 1.3 ug/m3 and 0.8 ug/m3 for total suspended particulates and respirable particulates, and these represent 1.0 and 0.8 respectively. Chloride was found to be 13.4 ug/m3 (10.5) for total suspended particulates and 1 ug/m3 (0.96) for respirable pa~ticulates and was found to be mainly concentrated in total suspended particulates. Henzene soluble organic matter was found to be 44 ug/m3 (34.4) for total suspended particulates and 69 ug/rn3 (65.1) in respirable particulates being mainly concentrated in the respirable fraction. It can be concluded that no fixed relation between total suspended particulate and respirable particulate could be deduced from this study. \ However, the importance of respirable sampling in air pollution is quite evident, where some constituents such as benzene soluble organic matter and ’sulfate contents ,were found to be higher in the respirable fractions that are inhalable and have an adverse’ effect on the health of community . people. However, total suspended particulate still gives good indices to particles concentrated in the larger fractions (such as chloride), which although may not be hazardous from the inhalable size point of view, but however may have damaging effect on property and land