Mahmoud Mohammadyan; milad pouransari; reza ali mohammadpour tahmtan; razie yousefinajad; shahram eslami
Abstract
Introduction: Exposure to respirable cement dust cause some adverse health effects on exposed workers. The aim of this study was to assess the risk of occupational exposure to respirable cement dust for a cement factory's workers and recommend controlling methods to reduce the risk of exposure. Materials ...
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Introduction: Exposure to respirable cement dust cause some adverse health effects on exposed workers. The aim of this study was to assess the risk of occupational exposure to respirable cement dust for a cement factory's workers and recommend controlling methods to reduce the risk of exposure. Materials and methods: The 0600 standard method of NIOSH was applied to evaluate workers' exposure to cement respirable particles using a personal sampling pump, a cyclone and a filter. For risk assessment of cement respirable particles, a standard method which provided by the Institute of the occupational health and Safety in Singapore was used. Finally, the risk level of exposure to respirable cement particles was assessed. Results: The results of this study showed that most workers employed in various worksites of the cement production were exposed to dust higher than the OEL recommended by the Technical Committee of occupational health in Iran, and the TLV recommended by ACGIH. Exposure risk assessment in different parts of cement factory showed a moderate risk level for all worksites. Conclusions: Employees who were working in different worksites of the plant were exposed to risk of cement respirable particles. Thus, the control methods of exposure to particles are suggested.
Mahmoud Mohammadyan; Ahmad Alizadeh Larimi; Mohsen Gorgani; Fatemeh Taghavi Soghondikolaei
Abstract
Background & objeftive: Electromagnetic field comprises electric and magnetic fields which is produced by electricity current. Long term exposures to electromagnetic fields have some adverse health effects on exposed workers. Applications of equipment which create electromagnetic field are increasingly ...
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Background & objeftive: Electromagnetic field comprises electric and magnetic fields which is produced by electricity current. Long term exposures to electromagnetic fields have some adverse health effects on exposed workers. Applications of equipment which create electromagnetic field are increasingly high. Therefore, the current study was carried out to evaluate electromagnetic fields in one of the oil product distribution company in Mazandaran province. Materials & Methods: In this cross-sectional study a real time EMF measurement device was used to evaluate electromagnetic field in the vicinity of computers’ monitors, cases, servers, copying machines, and also in electricity posts. Measurement was carried out in 28 sites and the results were compared with national and international standards. Results: The average of electric field for all stations was 44.4 v/m and the maximum and minimum rates of electric field were 208 and 0.5 v/m related to copying machine and the electricity generator respectively. The mean magnetic field density was 61.7×10-6 mT for all studied sites. The highest magnetic field intensity (5.0×10-4 mT) was found in high voltage fuse box and the lowest (0.2×10-6 mT) was related to electricity control room. Conclusion: The measured electric and magnetic intensity fields were lower than national and international standards. As the intensity of evaluated electric and magnetic fields were lower than national and international recommended levels, the workers would exposed to safe level of electromagnetic field.