Semnan University of Medical Sciences

Research and Technology Vice Chancellor

Goudarzi, Gholamreza and Shirmardi, Mohammad and Khodarahmi, Fatemeh and Hashemi-Shahraki, Abdolrazagh and Alavi, Nadali and Ahmadi Ankali, Kambiz and Babaei, Ali Akbar and Soleimani, Zahra and Bagherian Marzouni, Mohammad (2014) Particulate matter and bacteria characteristics of the Middle East Dust (MED) storms over Ahvaz, Iran. Aerobiologia, 30 (4). pp. 345-356. ISSN 0393-5965

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    Abstract

    Abstract The Middle East Dust storms have greatly affected the south and west parts of Iran during the last decade. The main purpose of this study was to examine and compare culturable airborne bacteria concentration in particulate matter (PM) during normal, semidust, and dust event days in different places and seasons in Ahvaz from November 2011 to May 2012. Sampling was performed every 6 days and on dust event days at different sampling stations. The overall mean concentrations of PM10, PM2.5, and PM1 for the entire study periodwere 598.92, 114.8, and 34.5 lg/m3, respectively. The PM concentrations during the dust event days were much higher than normal and semidust event days. The highest mean PM concentrations were observed in March 2011. The low PM2.5/PM10 ratios indicate that these PM are mostly originating from natural sources such as dust storms. The overall mean concentration of total bacteria during the study period was 620.6 CFU/m3. The greatest bacterial concentrations were observed during dust event days and at areas with high traffic and more human activities compared with normal days and greener areas. The percentage of gram-positive bacteria was significantly higher than that during the study period (89 vs 11 %). During this study, 26 genera of culturable bacteria were identified from all the sampling stations. The most dominant genera in all sampling stations were Streptomyces, Bacillus, Kocuria, Corynebacterium, and Paenibacillus. The results also showed that there were positive correlations between PM and bacterial concentrations during the study period (p\0.05). Keywords Particulate matter � Airborne bacteria � Dust event days � Ahvaz � Khuzestan

    Item Type: Article
    Subjects: R Medicine > R Medicine (General)
    Divisions: Faculty of Medical Sciences > School of Medicine
    Depositing User: Mr Vahab Moshtaghi
    Date Deposited: 12 Nov 2016 10:34
    Last Modified: 12 Nov 2016 10:34
    URI: http://eprints.semums.ac.ir/id/eprint/408

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