A Study on the Amount of Free Silica in the Dusts of Stonecutting Factories and Offering Controlling Solutions

1
Mohammad Hossein Moafi
Mohammad Hossein Moafi
2
Seyed Mostafa Khezri
Seyed Mostafa Khezri
3
Farideh Atabi
Farideh Atabi
2 Islamic Azad University

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This research aims at determining amount of dispersion of free silica and inhalant dusts and contents of free silica in the inhalant aerosol of stonecutting factories and offering engineering control strategies to omit or decrease distribution of the aerosol containing silica. Using standard method Niosh-7601, 40 samples of inhalant dusts were taken from 5 stonecutting factories and concentration of inhalant dusts was calculated by weighting. One sample of each stonecutting factory was analyzed by method of UV-VIS to figure out the amount of free silica. Two volume samples were provided and analyzed by X-ray dispersion to determine type of silica in the inhalant dusts. Concentration of inhalant dusts containing free silica in different worksites is 2.232 mg/m3 in average. The most amounts were found in grinding and polishing worksite amounted to 3.3293 with criteria deviation of 0.54 and the least amount was related to entrance door station, amounted to 1.1191 with criteria deviation of 0.25. The most amount of free silica in the worksites was related to worksite No.3, amounted to 12.15% and the least amount was related to worksite No.4 which was amounted to 4.25%. The most concentration of inhalant dusts was related to worksite No.2, i.e. 2.745 mg/m3 in average, and the least concentration of inhalant dusts was related to worksite No.5, i.e. 2.056 mg/m3 in average. Quartz was the result of analysis of volume samples by XRD method to determine type of silica.

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No external funding was declared for this work.

Conflict of Interest

The authors declare no conflict of interest.

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No ethics committee approval was required for this article type.

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Not applicable for this article.

Mohammad Hossein Moafi. 2013. \u201cA Study on the Amount of Free Silica in the Dusts of Stonecutting Factories and Offering Controlling Solutions\u201d. Global Journal of Research in Engineering - G: Industrial Engineering GJRE-G Volume 13 (GJRE Volume 13 Issue G3): .

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Crossref Journal DOI 10.17406/gjre

Print ISSN 0975-5861

e-ISSN 2249-4596

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July 4, 2013

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English

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This research aims at determining amount of dispersion of free silica and inhalant dusts and contents of free silica in the inhalant aerosol of stonecutting factories and offering engineering control strategies to omit or decrease distribution of the aerosol containing silica. Using standard method Niosh-7601, 40 samples of inhalant dusts were taken from 5 stonecutting factories and concentration of inhalant dusts was calculated by weighting. One sample of each stonecutting factory was analyzed by method of UV-VIS to figure out the amount of free silica. Two volume samples were provided and analyzed by X-ray dispersion to determine type of silica in the inhalant dusts. Concentration of inhalant dusts containing free silica in different worksites is 2.232 mg/m3 in average. The most amounts were found in grinding and polishing worksite amounted to 3.3293 with criteria deviation of 0.54 and the least amount was related to entrance door station, amounted to 1.1191 with criteria deviation of 0.25. The most amount of free silica in the worksites was related to worksite No.3, amounted to 12.15% and the least amount was related to worksite No.4 which was amounted to 4.25%. The most concentration of inhalant dusts was related to worksite No.2, i.e. 2.745 mg/m3 in average, and the least concentration of inhalant dusts was related to worksite No.5, i.e. 2.056 mg/m3 in average. Quartz was the result of analysis of volume samples by XRD method to determine type of silica.

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A Study on the Amount of Free Silica in the Dusts of Stonecutting Factories and Offering Controlling Solutions

Mohammad Hossein Moafi
Mohammad Hossein Moafi
Seyed Mostafa Khezri
Seyed Mostafa Khezri Islamic Azad University
Farideh Atabi
Farideh Atabi

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