地板送风室内可吸入颗粒物粒径及浓度分布特征  

Characteristics of Indoor Inhalable Particle Size Distribution in Under-floor Air Distribution System without Filters

作　　者：王美霞[1] 李念平[1] 李灿[1] 

机构地区：[1]湖南大学土木工程学院,湖南长沙410082

出　　处：《环境与健康杂志》2008年第2期144-146,共3页Journal of Environment and Health

基　　金：教育部博士点基金资助项目(20050232022)

摘　　要：目的研究地板送风情况下室内可吸入颗粒物粒径分布特点,并分析人员活动和吸烟对其影响。方法于2007年6—7月,测定了地板送风系统室内空气中各粒径可吸入颗粒物的频数(假设颗粒为球体且密度为1g/cm3),计算出颗粒物的表面积和质量浓度并用公式表示出粒径与频数、表面积和质量浓度的关系。结果颗粒物粒径(d)的对数与累积频数(Csn)的对数呈线性关系(lnCsn=15.41-3.28lnd,r=-0.986),累积总表面积(Csa)的对数与粒径呈线性关系(lnCsa=0.21-0.51d,r=-0.980),累积总质量浓度(Csm)的对数与粒径呈线性关系(lnCsm=4.16-0.30d,r=-0.987)。人员活动使室内空气中粒径大于等于1μm的颗粒物浓度增加,总质量浓度增加为无人员活动时的约2倍。而吸烟使室内空气中粒径小于等于1μm的颗粒物浓度增加。结论颗粒物粒径与累积频数、累积总表面积、累积总质量浓度有关。Objective To know the characteristics of size distribution of the inhalable particles in the indoor air in the condition the under-floor air distribution systems were used and to study the effect of human activities and smoking. Methods The frequency of inhalable particulate matter was determined in Jun.-Jul.,2007. The surface area and mass concentration were calculated based on the assumption that the particulate was sphere and its density was 1g/cm^3. The relationship between frequency, surface area, mass concentration and particle size were shown in logarithmic plot. Results It was found that the logarithm of cumulative frequency and the logarithm of diameter was a linear relation, the logarithm of cumulative total surface area and diameter was a linear relation and the logarithm of cumulative total mass and diameter was a linear relation. Particle of no less than 1 micron increased due to human activities, total mass concentration were two times the concentration of no human activities. The particle of no larger than 1 micron may increase due to smoking. Conclusion The diameter of the particle matter has relationship with the cumulative frequency, the cumulative total surface and the cumulative total mass.

关 键 词：空气污染 室内 颗粒物 地板送风空调系统 

分 类 号：R122.2[医药卫生—环境卫生学]