تفاصيل الوثيقة

نوع الوثيقة : مقال في مجلة دورية 
عنوان الوثيقة :
الجسيمات العالقة المتعلقة بالكائنات الدقيقة: دراسة أولية
Microorganisms associated particulate matter: A preliminary study
 
الموضوع : علوم البيئة 
لغة الوثيقة : الانجليزية 
المستخلص : This study aims to determine the microbiological quality of particulate matter (PM) in an urban area in Jeddah, Saudi Arabia, during December 2012 to April 2013. This was achieved by the determination of airborne bacteria, fungi, and actinobacteria associated PM10 and PM2.5, as well as their relationships with gaseous pollutants, O3, SO2 and NO2, and meteorological factors (T°C, RH% andWs). High volumesamplerswith PM10 andPM2.5 selective sizes, and glass fiber filters were used to collect PM10 and PM2.5, respectively. The filters were suspended in buffer phosphate and aliquots were spread plated onto the surfaces of trypticase soy agar, malt extract agar, and starch casein agar media for counting of bacteria, fungi and actinobacteria-associated PM, respectively. PM10 and PM2.5 concentrations averaged 159.9 μg/m3 and 60 μg/m3, respectively, with the ratio ofPM2.5/PM10 averaged ~0.4. The concentrations of O3, SO2 and NO2 averaged 35.73 μg/m3, 38.1 μg/m3 and 52.5 μg/m3, respectively. Fungi and actinobacteria associated PM were found in lower concentrations than bacteria. The sum of microbial loads was higher in PM10 than PM2.5, however a significant correlation (r = 0.57, P ≤ 0.05) was found between the sum of microbial loads associated PM10 and PM2.5. Aspergillus fumigatus and Aspergillus niger were the common fungal types associated PM. Temperature significantly correlated with both PM10 (r = 0.44), and PM2.5 (r= 0.5). Significant negative correlations were found between O3 and PM2.5 (r=−0.47), and between SO2 with PM10 (r=−0.48).Wind speed positively correlatedwith airborne microorganisms associated PM. The regression model showed that the inverse PM2.5 concentration (1/PM2.5) was a significant determinant of fungal count associated PM. Chemical processes and environmental factors could affect properties of PMand in turn its biological quality. 
ردمد : 0048-9697 
اسم الدورية : Science of the Total Environment 
المجلد : 5 
العدد : 14 
سنة النشر : 1435 هـ
2014 م 
نوع المقالة : مقالة علمية 
تاريخ الاضافة على الموقع : Wednesday, March 12, 2014 

الباحثون

اسم الباحث (عربي)اسم الباحث (انجليزي)نوع الباحثالمرتبة العلميةالبريد الالكتروني
Mansour A. AlghamdiAlghamdi, Mansour A.باحث  
Magdy ShamyShamy, Magdy باحث  
Maria Ana RedalRedal, Maria Anaباحث  
Mamdouh KhoderKhoder, Mamdouh باحث  
Abdel Hameed AwadAwad, Abdel Hameed باحث abed196498@yahoo.com
Safaa ElserougyElserougy, Safaa باحث  

الملفات

اسم الملفالنوعالوصف
 36692.pdf pdfMicroorganisms associated particulate matter: A preliminary study

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