室内气溶胶纳米颗粒物的粒径分布特征

Characterizing of the size distribution of indoor airborne nanoparticle

研究室内气溶胶纳米粒径颗粒物的环境行为和污染特征对室内空气质量的影响具有重要意义.采用WPSTMModel 1000XP宽范围粒径谱仪测量了粒径介于10~10000nm之间的气溶胶纳米颗粒物.主要探讨了粒径在10~500nm间的气溶胶纳米颗粒物在不同室内条件的粒径分布特征.结果发现,超细颗粒物(纳米粒径10~500nm)对总粒子数浓度贡献较大,而细颗粒物500nm^10μm对总粒子质量浓度贡献较大,导致室内颗粒物粒子质量浓度通常比室外低,表现出室内污染以纳米粒径超细颗粒物为主的特点.抽烟明显增大纳米颗粒物粒子数浓度和粒子质量浓度.研究表明,室内空气质量对人体健康的影响可能超过室外,应当引起足够的重视和关注.

The number and mass concentrations of aerosol particulate size ranging from 10 to 10000nm in indoor and outdoor air was measured using wide range particle spectrometer （Model 1000XP WPS） produced by MSP Corporation, and the nanoparticle size （10 - 500nm） in various room conditions was highlighted. It was found that the ultrafine particles （10 -500nm） has more contribution to the total number concentration, and the fine particles （500 - 10000nm） has more contribution to the total mass concentration. The results also showed that the mass concentration of indoor fine particulates was lower than that of outdoor and the nanoparticles are dominant in indoor atmosphere. The number or mass concentrations of nanoparticle increases greatly when smoking happens.