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نوع مقاله : مقالات پژوهشی

نویسندگان

1 دانشیار، گروه بهداشت حرفه‌ای، مرکز تحقیقات علوم بهداشتی، دانشکده بهداشت، دانشگاه علوم پزشکی مازندران، ساری، ایران.

2 مربی، گروه بهداشت حرفه‌ای، دانشکده بهداشت، دانشگاه علوم پزشکی مازندران، ساری، ایران.

3 کارشناس ارشد، گروه بهداشت حرفه‌ای، دانشکده بهداشت، دانشگاه علوم پزشکی مازندران، ساری، ایران.

چکیده

زمینه و هدف:میدان الکترومغناطیسی از دو قسمت میدان الکتریکی و میدان مغناطیسی و هر دوی آنها توسط جریان الکتریسیته تولید می­شوند. مواجهه طولانی مدت با میدان‌های الکترومغناطیس اثرات زیان ‌باری بر سلامت کارکنان در معرض دارد. استفاده از وسایل مولد امواج و اثراتی که این میدان­ها می­گذارند رو به گسترش است، لذا مطالعه حاضر با هدف ارزیابی شدت میدان­های الکترومغناطیس در بخش­های اداری و پست برق یکی از پایانه­ های نفتی استان مازندران انجام شد.
مواد و روش‌ها: در این مطالعه مقطعی شدت میدان­های الکترومغناطیس ناشی از مانیتور و سرورهای کامپیوتر واحدهای مختلف و همچنین میدان­های الکترومغناطیسی در پست­های برق و دستگاه فتوکپی در 28 ایستگاه کاری با استفاده از دستگاه EMF MEASUREMENT اندازه­گیری و با استانداردهای موجود ملی و بین‌المللی مقایسه شد. داد­ه‌ها با استفاده از تست­های آمار توصیفی و نرم‌افزار آماری20 SPSS مورد آنالیز قرار گرفتند.
یافته‌ها: میانگین میدان الکتریکی اندازه­گیری شده در تمام وسایل الکتریکی معادل m/v 44/4 و بیشترین و کمترین مقدار میدان الکتریکی اندازه­گیری شده به ترتیب m/v 208 و 0/5 و مربوط به دستگاه تکثیر و ژنراتور برق بود. میانگین شدت میدان مغناطیسی در تمام ایستگاه­ها mT 61/7×10-6 اندازه­گیری شد. بیشترین شدت میدان مغناطیسی (mT 5×10-4) در تابلوی برق فشار قوی و کمترین آن ( mT0/2×10-6) مربوط به اتاق کنترل برق بود.
نتیجه‌گیری:شدت تمام میدان­های الکتریکی و مغناطیسی اندازه­گیری شده پایین‌تر از حدود استاندارد­های ملی و بین‌المللی بود. با توجه به اینکه شدت میدان­های الکتریکی و مغناطیسی مورد مطالعه از حدود توصیه شده ملی و بین‌المللی کمتر بود، احتمالاً شاغلین با حدود ایمن میدان الکترومغناطیس در مواجهه هستند.

کلیدواژه‌ها

عنوان مقاله [English]

Measurement of electromagnetic field of monitors and electric posts in one of the oil product distribution company in Mazandaran province

نویسندگان [English]

  • Mahmoud Mohammadyan 1
  • Ahmad Alizadeh Larimi 2
  • Mohsen Gorgani 3
  • Fatemeh Taghavi Soghondikolaei 3

1 Associate professor, Health Science Research Center, Faculty of Health, Mazandaran University of Medical Sciences, Sari Iran

2 Lecturer, Faculty of Health, Mazandaran University of Medical Sciences, Sari, Iran.

3 M.SC, Health Science Research Center, Faculty of Health, Mazandaran University of Medical Sciences, Sari Iran.

چکیده [English]

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.  

کلیدواژه‌ها [English]

  • electric field
  • Magnetic Field
  • oil company
  • Computer
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