غلظت گردوغبار پنبه در هوای کارگاههای حلاجی کارخانجات نساجی استان مازندران

ABSTRACT Cotton dust is one of the chemical agents that cause air pollution in textile workshops. An investigation was done to measure cotton dust concentration in Mazandaran Province. 37 samples were collected by personal samplers devices and whatman filter papers of worker's inhalation zone of ambient air that contained total dust. 40 samples were collected by whatman filter papers and horizontal Hexlet devices of general ambient air that containdrespirable dust. It was found that average complete dust concentration in all Mazandaran card workshops was 4.37 mg/m3 Maximum and minimum level of complete dust concentration were 10.24 and 1.22 mg/m3 respectively. Average of respirable dust concentration was 3.43 mg/m3 This value is 17 times more than TL V. Maximum and minimum respirable dust concentrations were 5.47 and 0.60 mg/m3 that is 27 and 3 times more than TLV respiectively. It is also found out that approximately 78% pereent of dust is respirable dust.