Detection and comparison of fiber count concentration in processing environment of asbestos and man-made mineral fiber
10.3760/cma.j.cn121094-20191128-00546
- VernacularTitle:石棉及人造矿物纤维加工作业环境的粉尘纤维计数浓度检测及对比研究
- Author:
Zhaoqiang JIANG
1
;
Dichu SHAO
;
Yongran CHENG
;
Chao MIAO
;
Jianrong CHAI
;
Chengmin XU
;
Min YU
;
Jing WANG
;
Tao LI
;
Junqiang CHEN
Author Information
1. 310013 杭州，杭州医学院（浙江省医学科学院）职业病防治研究所
- Keywords:
Asbestos;
Fiber;
Man-made mineral fiber;
Fiber count;
Ceramics;
Glass
- From:
Chinese Journal of Industrial Hygiene and Occupational Diseases
2020;38(9):675-678
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To connect with the measurement data of asbestos dust fiber concentration in foreign countries, improve the accuracy of asbestos fiber detection in China, and understand the dust exposure in the working environment of asbestos and man-made mineral fiber production and processing sites in Zhejiang Province. The fiber count concentrations of working environment in glass fiber, ceramic fiber and asbestos processing plants were measured and compared.Methods:The dust concentration in the working environment of two glass fiber factories, one ceramic fiber factory and eight asbestos products processing factories was measured. The total dust mass concentration was measured according to GBZ/T 192.1-2007, and the fiber count concentration was measured by phase contrast microscope. Kruskal Wallis was used to test and compare the dust concentration in the working environment of each post. The correlation between asbestos mass concentration and fiber count concentration was analyzed by Spearman correlation.Results:Under the phase contrast microscope, there were many short and fine asbestos fibers in the field of vision, and there were many impurities around. The average dust concentration of asbestos processing plant was 3.2 f/ml, and the dust concentration of cotton ginning was the highest (6.68 f/ml) . There was a significantly positive correlation between asbestos fiber count concentration and mass concentration ( r=0.535, P=0.033) . The average fiber count concentration of glass fiber factory was 0.001 f/ml, and the highest was 0.005 f/ml. The average fiber count concentration of ceramic fiber factory was 0.001 f/ml, and the highest was 0.006 f/ml. Conclusion:The fiber count concentration in the working environment of asbestos factory in Zhejiang Province is obviously over the standard, which is one of the important reasons for the high incidence of mesothelioma in this area. Short and small asbestos fibers are easy to be ignored when counting. It is necessary to improve the actual operation process of fiber counting to form a laboratory standard in China.
