【摘要】 本文对三个生产不同轻稀土产品的稀土冶炼厂进行了劳动卫生和职业流行病学调查,探讨了车间空气中稀土粉尘卫生标准。调查结果:稀土粉尘均值（G）波动在4.5—13.8mg/m³,游离SiO₃含量为0.1一2.9%。对521名稀土粉尘作业工人体检发现,上呼吸道及皮肤疾患明显高于对照组。肺通气功能降低,尿NAG含量、发和尿稀土含量亦显著高于对照组,尘肺检出率为0.19%。综合其它指标分析,稀土粉尘的最高容许浓度可考虑订为4—6mg/m³。更多还原

【Abstract】 Environmental and epidemiological investigations were conducted in three factories producing various products of LRE.The hygienic standard of LRE dust in the air of workplace was also studied.The results showed that the geometric mean of the conc.of LRE dust ranged from 4.5-13.8mg/m3,in which the content of free silica was 0.1-2.9%.lt was found that the prevalence rate of the resp. diseases of the 521 exposed workers examined increased obviously, and their pulmonary ventilational function lowered,LRE contents in urine and hair showed a significant increase, and so did the activity of their urinary N-acet-D-glucosaminidase(NAG) .The prevalence of pneumoconiosis was 0.19% and the results of other indices, it was recommended that 4-6mg/m3 might be taken as the MAC of LRE dust.更多还原