Click for new scientific resources and news about Corona[COVID-19]

Paper Information

Journal:   AVICENNA JOURNAL OF CLINICAL MEDICINE (SCIENTIFIC JOURNAL OF HAMADAN UNIVERSITY OF MEDICAL SCIENCES AND HEALTH SERVICES)   FALL 2007 , Volume 14 , Number 3 (SN 45); Page(s) 67 To 73.
 
Paper: 

EVALUATION OF FREE SILICA EMISSION IN AMBIENT AIR OF STONE CRUSHING IN AZANDARIAN AREA OF HAMADAN STATE BY USING OF X-RAY DIFFRACTION METHOD

 
 
Author(s):  ALIABADI M.*, BAHRAMI A.A.R., MAHJOUB H., GHORBANI F., BARGHI M.A., GOLBABAEI F.
 
* SCHOOL OF HEALTH, HAMADAN UNIVERSITY OF MEDICAL SCIENCES & HEALTH SERVICES, HAMADAN, IRAN
 
Abstract: 

Introduction & Objective: Determination of free silica to calculate threshold limit value is necessary. The purpose of this research was study of free silica in particulate emission in ambient air of stone crushing workshops in Azandarian area.
Materials & Methods: 40 samples of respirable dust from workplace air were obtained in breathing zone of workers in different job stations. Samples were taken with personal samples pumps attach to cyclones and analyzed by a gravitmetric method and X –Ray Diffraction.
Results: The results were showed that mean concentration of respirable dust and quartz in workshops (type 2) was equal to 1.17-1.24 mg/m3 and 0.94-1.03 mg/m3 respectively, and also in workshops (type 1) was equal to 0.81-1.07mg/m3 and 0.79-1.05 mg/m3 respectively. Free silica rate in ambient air of workshops type1 and type2 was 97.5% and 81.3% respectively. Difference of free silica rate in two types of workshops was statistically significant (p=0.0001).
Conclusion: The comparison of time weighted average of respirable dust concentration with threshold limit value showed concentration of respirable particles was less than threshold limit value.

 
Keyword(s): FREE SILICA, STONE CRUSHING, X-RAY DIFFRACTION
 
References: 
  • ندارد
 
  Persian Abstract Yearly Visit 58
 
Latest on Blog
Enter SID Blog