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据CMJ报道:卫生部工业卫生实验所和包钢白云鄂博铁矿职工医院陈兴安研究员等科技人员,自1982—2001年间,完成了长期吸入钍尘健康效应的20年追踪调查研究课题。结果表明,该矿自1994年起(开采36年之后),接尘矿工中超额肺癌病死率显著高于对照(P<0.005)。作者们认为这是由于长期吸入较高浓度的含钍粉尘(该矿各接尘车间空气中的钍尘浓度始终高于国家规定的最高容许浓度2mg/m3)和气子体所造成。含钍粉尘中的致癌源为ThO、和SiO2。这是人类首次发现长期吸入含钍粉尘和气子体后的致癌作用。研究结果提示有关部门加强对这类厂矿防尘措施的迫切性。
According to the CMJ report, researchers from the Ministry of Health Industry Hygienic Laboratory and researcher Chen Xingan from the Workers’ Hospital of Baiyun Obo Iron and Steel Mine completed the 20-year follow-up investigation on the health effects of long-term inhalation of thorium dust from 1982 to 2001. The results show that since 1994, after 36 years of mining, the mortality of excess lung cancer in dust miner was significantly higher than that of the control (P <0.005). The authors believe this is due to long-term inhalation of higher concentrations of thorium-containing dust (thorium dust concentration in the dust of the mine dust collection workshop is always higher than the maximum allowable concentration of 2mg / m3 as stipulated by the state) and the gas body caused. Thorium-containing dust carcinogens ThO, and SiO2. This is the first human carcinogen found after long-term inhalation of thorium dust and gas. The results suggest that the relevant departments to step up the urgency of dust control measures for such factories and mines.