摘要
为了研究火力发电厂粉尘与尘肺发病的剂量－反应关系，根据某火力发电厂接尘工人接尘时间、肺总通气量、粉尘浓度和游离二氧化硅含量，计算职工肺内石英负荷量，然后采用累积剂量患病率寿命表法研究尘肺患病率与粉尘的剂量－反应关系，推算该类粉尘的容许浓度。结果表明接尘剂量与尘肺患病率呈显著正相关关系，提示每人平均工作３０ａ，使尘肺患病率低于５‰，接触煤粉者和接触灰粉者作业场所平均粉尘浓度分别应控制在１０．００ｍｇ／ｍ３和３．２５ｍｇ／ｍ３以下。
In order to study the doseresponse relationship between dust and incidence of pneumoconiosis in a thermal power plant,the quartz burden in their lungs of the workers exposed to dust was calculated based on their length of exposure and total lung capacities,concentrations of dust and free silica in workplace air,and then the relationship between dose of dust and prevalence of pneumoconiosis and dust allowable concentration in workplace air was calculated by lifetable method with dosecumulative morbidity.Results indicated that dust exposure dose correlated significantly to prevalence of pneumoconiosis with a coefficient of correlation.It indicated that coal dust and fly ash concentrations in workplace air should be controlled below 100 mg/m3 and 325 mg/m3,respectively,to keep the prevalence of pneumoconiosis lower than five per thousand for those working there for thirty years in average..
出处
《中国工业医学杂志》
CAS
1998年第1期8-10,共3页
Chinese Journal of Industrial Medicine
基金
河南省医学科学院科研基金资助
关键词
火力发电厂
尘肺
寿命表
Thermal power plant
Pneumoconiosis
Life-table method
