Effect of the Green Deck on Local Air Quality
During one month sampling in the Hong Kong Polytechnic University roadside monitoring station, we found that roadside air pollution is very serious which chronically affect human health; especially the people have long-term activities along the roadside. Many students and staffs of the Hong Kong Polytechnic University have to be exposed the roadside pollution because they need to walk through a crowded pedestrian bridge. The results show the gaseous pollutant, hourly average nitrogen dioxide (NO2) concentration have ~10% of the total period of sampling time (1133 hours) exceed the proposed new local standard (200 μg/m3). From the particulate matters (PM), HK AQO proposed 100 and 75 μg/m3 as PM10 and PM2.5 24-hr average standard and seldom days have been reported exceed the local standard. But the Hong Kong roadside PM10 and PM2.5 average concentration level is ~50% to 68% higher than WHO AQG (50 and 25μg/m3). In order to evaluate the effect of green deck on local air quality, the comparison test has been conducted in roadside and PQ podium during the morning and evening peak hours. All pollutants have significantly decreased. PM10 concentration has reduced around 48% and 38% in PQ podium than the value measured in roadside monitoring station in morning and evening peak hour. The OVOCs species, i.e. formaldehyde and acetaldehyde, are ~11- 17% and ~27-29% reduced. Total VOCs concentration is reduced ~30% in PQ podium. The concentration of BTEX has ~30% to 60% reduction. The risk assessment was conducted to evaluate the chronic health impact for HK PolyU staff. Formaldehyde exposure via inhalation is 1.34E-06, which was higher than acceptable criteria 1.00E-06. The other carcinogenic pollutants, i.e. acetaldehyde and benzene, exposure level were within the acceptable level.
air pollution risk assessment carcinogenic compounds
LEE Shun-cheng Yuan Gao
The Hong Kong Polytechnic University, Hong Kong SAR Chu Hai College of Higher Education, Hong Kong
国际会议
2017世界可持续建筑环境大会(the World Sustainable Built Environment Conference)
香港
英文
265-270
2017-06-05（万方平台首次上网日期，不代表论文的发表时间）