Document Details

Document Type : Thesis 
Document Title :
SURFACTANTS IN ATMOSPHERIC PM2.5 IN JEDDAH CITY
مخفضات التوتر السطحي في الجسيمات من نوع PM2.5 في الهواء الجوي بمدينة جدة
 
Subject : Faculty of Science 
Document Language : Arabic 
Abstract : Surfactants in Atmospheric PM2.5 in Jeddah City Air pollution is a matter of great concern as it affects human health and the environment in many ways. Atmospheric particulate matter especially PM2.5 are known to cause harmful effects. PM2.5 is known to be associated with respiratory and cardiovascular diseases along with its effects on the environment such as light scattering effects that cause cooling or warming depending on the chemical structure of PM2.5. Surface-active agents (surfactants) are a class of materials of great importance in atmospheric chemistry because of their combined hydrophilic and hydrophobic properties and their ability to reduce surface tension of liquids which can alter the movement of materials across aqueous interfaces, hinder water evaporation and affect the solubility of compounds. Surfactants are commonly used in everyday life and are widely used in industry and transportation. This wide use of surfactants in everyday life leads to their presence in atmospheric PM. In this study, 83 PM2.5 samples were collected from the atmosphere of Jeddah city during the period February- August 2018. Extraction of anionic and cationic surfactants was carried out into chloroform. Anionic and cationic surfactants were measured employing a spectrophotometric method as methylene blue and Disulphine blue active substances, respectively. The observed anionic surfactants range was 0.36 – 4.99 nmol m-3. The observed cationic surfactants concentrations range was 0.04 – 2.79 nmol m-3. The arithmetic mean for anionic surfactants concentrations and standard deviation were 1.83±1.03 whereas the arithmetic mean for cationic surfactants was 0.67±0.55. Winter surfactant concentrations were always higher than summer’s reflecting temperature effects on concentrations. Anionic surfactants were dominant in all samples. The average PM2.5 mass concentration 61.98 g m-3 and the standard deviation was 40.07 µg m-3. 
Supervisor : Prof. Mohammad W. Kadi 
Thesis Type : Master Thesis 
Publishing Year : 1442 AH
2020 AD 
Added Date : Friday, January 29, 2021 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
عبدالله عتيق العوفيAloufi, Abdullah AteeqResearcherMaster 

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