Document Details

Document Type : Article In Journal 
Document Title :
Organic dust and gaseous contaminants at wood working shops
التلوث بالأتربة العضوية والغازية في ورش الخشب
 
Document Language : English 
Abstract : Abstract Airborne dust bioaerosols, ammonia and formaldehyde levels were determined inside two different (ventilated and unventilated) wood working shops. Airborne dust was found at mean values of 4.3 and 3.01 mg m-3. These levels were higher than that recommended by Egyptian environmental law [1 mg m-3 indoor maximum allowable concentration (MAC) for hard wood]. The highest frequency of aerodynamic size distribution of airborne wood dust was detected at a diametre of 4.9 µm which was recorded during a machining operation. Total viable bacteria were recorded at a mean value of 104 colony-forming units (cfu) m-3, whereas Gramnegative bacteria were found at very low counts (101 cfu m-3). Fungi levels were recorded at mean values of 103 and 102 cfu m3 in ventilated and unventilated shops, respectively. Penicillium, Aspergillus, Cladosporiumm and yeast species were dominant isolates. Moreover, actinomycetes were found at a mean value of 103 cfu m-3 at both workshops. Ammonia was detected in relatively low concentrations (mean values of 457 and 623 mg m-3), whereas formaldehyde was found in relatively moderate concentrations (mean values of 0.42 and 0.64 ppm) 
ISSN : 73 
Journal Name : Journal of Environmental Monitoring 
Volume : 2 
Issue Number : 1 
Publishing Year : 1421 AH
2000 AD 
Article Type : Article 
Added Date : Wednesday, August 31, 2011 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
ممدوح ابراهيم خضيرKhoder, Mamdouh IbraheinInvestigatorDoctorateKhoder_55@yahoo.com

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