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目的了解北京市大兴区工矿企业中苯、甲苯、二甲苯工作场所职业病危害现状,为行政部门的监督管理提供依据,同时引起管理者的重视,改善工人的工作环境。方法依据国家有关标准、规范的要求对工作场所进行检测。按《工作场所有害物质监测方法》的要求,采用活性炭管采集车间空气的样品进行分析。结果 2005—2010年该区存在苯、甲苯、二甲苯职业病危害因素的有89家企业,行业分布以印刷业、家具制造业为主,在所有行业中占到90.60%,其他行业仅占9.40%;检测样品447个,苯样品浓度检测结果主要集中在6 mg/m3以下,甲苯、二甲苯样品浓度检测结果主要集中在50mg/m3以下。苯、甲苯时间加权平均(TWA)浓度和短时间接触浓度(STEL)的合格率在行业之间差异有统计学意义。家具制造业合格率均低于印刷和其他企业(P<0.05)。结论目前,该区工作场所中苯、甲苯、二甲苯样品检测合格率虽然均在80%以上,但仍有超标现象,应继续加强监管工作。
Objective To understand the status quo of occupational hazards in the benzene, toluene and xylene workplaces in Daxing District of Beijing and to provide the basis for the supervision and administration of the administrative departments. At the same time, managers should pay attention to improve the working environment of workers. Methods According to the relevant national standards and norms of the requirements of the workplace testing. According to “Workplace Hazardous Substances Monitoring Method” requirements, the use of activated carbon tube sampling of the workshop air for analysis. Results From 2005 to 2010, there were 89 enterprises with occupational hazards of benzene, toluene and xylene in this area. The distribution of the industry was mainly in the printing and furniture manufacturing industries, accounting for 90.60% in all industries and only 9.40% in other industries. 447 samples were detected, and the concentration of benzene in the samples was mainly below 6 mg / m3. The concentrations of toluene and xylene in the samples were mainly below 50mg / m3. The passing rates of benzene, toluene time weighted average (TWA) and short-term exposure concentration (STEL) were statistically significant among different industries. Furniture manufacturing industry pass rates were lower than printing and other businesses (P <0.05). Conclusion At present, although the passing rates of benzene, toluene and xylene in the workplaces of the district are above 80%, they still have excessive standards. Supervision should continue to be strengthened.