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Personal Exposure Kit development

Introduction

Period: Nov 2015 – May 2016        Keywords: Personal exposure

This study represents the first attempt of real-world monitoring of personal air pollution exposure by a uniform population group – volunteers from Morgan Stanley Hong Kong. The objectives are: a) Develop the portable sensor technology to monitor and report personal air exposure; b) Monitor individual exposure to PM2.5 and analyze its levels in different microenvironments and districts in Hong Kong; c) Assess the time-activity pattern of Hong Kong residents and identify the potential air quality risk factors. Personal Exposure Kit (PEK) was developed to meet the need of portable Personal Integrated Exposure (PIE) measurement.

It was found that this group of metropolitan office workers spent more than 85% of time in indoor environments including offices, homes, and other public indoor venues. The results showed that one’s personal integrated exposure (PIE) at home is high, surprisingly more during the weekends, indicating that improving air quality in homes appears to be an important action for the protection of public health. It was also found that the diverse activities of urban office workers and the various indoor/outdoor microenvironments they experience on a daily basis cannot be represented by general air quality data reported by the regulatory monitoring of the HKEPD. More personalized air quality information, especially in offices and homes, may provide better information for individuals to understand and pay attention to their exposure to air pollution.

Contrast of time allocation and contribution to personal integrated exposure (PIE) of PM2.5 on weekday and weekend: (a) Weekday; (b) Weekend

Set-up of Personal Exposure Kit (PEK)

Boxplot of PM2.5 concentrations measured in each microenvironment

(weekday and weekend)


Project contact: Fenhuan YANG   Kiwi ZHANG