Monitoring and Assessment of O-3 and PM1 in the Microenvironment of a Workplace

摘要

Workplaces using office equipment often experience poor air quality in their indoor microenvironments. Office equipment, e.g., photocopier and printer, emits higher levels of ozone (O-3) and fine particles. This study uses field measurements to recognize and examine the patterns of the concentrations of O-3 and fine particles of aerodynamic diameter less than 1 mu (PM1) in the workplace microenvironment during working and nonworking hours. The O-3 and PM1 concentrations were measured simultaneously along with the climate variables from July 2011 to March 2012. The transient levels of these pollutants were also estimated to investigate the observed patterns under normal and closed ventilation conditions. Based on the old and new equipment and their use, different impact scenarios have been developed to study the relationships among O-3, PM1, and climate variables. Results revealed that photocopiers contribute to O-3, and the printing operations contribute to both O-3 and PM1. Further, O-3 contributes to PM1 in favorable climatic condition.