Study on revising the criteria of classification of hazard conditions of productive dust.
- Author:
Zhi-ming WANG
1
;
Mian-zhen WANG
;
Ya-jia LAN
;
Jing-dong LIU
;
Fu-rong WU
;
Su-jun FAN
;
Geng-wen CHEN
;
Xiao-he CHEN
;
Jian-sheng LI
Author Information
- Publication Type:Journal Article
- MeSH: China; Dust; analysis; Hazardous Substances; analysis; Humans; Lung; diagnostic imaging; pathology; Occupational Exposure; standards; Radiography; Retrospective Studies; Safety Management; standards
- From: Chinese Journal of Industrial Hygiene and Occupational Diseases 2004;22(1):33-35
- CountryChina
- Language:Chinese
-
Abstract:
OBJECTIVETo provide scientific basis data for revising the national hygiene criteria of "Classification of hazard conditions of productive dust" (GB5817-86).
METHODSThe data of the retrospective study and the field survey data were analyzed with correlation and regression analysis. The product of total dust concentration of respiratory exposure (mg/m(3)), total ventilation during exposure (m(3)/d per psrson), and level of free SiO(2) in dust (%) was the respiratory exposure dose of free SiO(2) (mg per day per person) which was used as dose criteria value of classification of hazard degree of dust.
RESULTSUsing free SiO(2) exposure dose and the dose-effect relationship, the hazard degrees of the dust were divided into 5 grades: 0, I, II, III, IV (0 - 8.0, 8.1 - 12.0, 12.1 - 16.0, > 24.1 mg per day per person).
CONCLUSIONThe exposure dose of free SiO(2) is closely related to the pathogenesis of silicosis. Using the exposure dose of free SiO(2) as the classification indicator of hazard degree of dust is reliable, simple and easy to execute.
