大型營建裸露地PM10與PM2.5排放特性之研究

Characteristic of PM10 and PM2.5 Emission from Large Scale Exposed Area in Construction Sites

胡偉興(Wei-Hsing Hu)

指導教授 ： 章裕民

國立臺北科技大學/工程學院/環境規劃與管理研究所/碩士(2006年)

https://doi.org/10.6841/NTUT.2006.00116

摘要

營建工程內裸露地時常受到機械擾動及風力作用產生大量懸浮微粒逸散。本
研究藉由收集各項影響因子，配合實場量測數據利用質量平衡法(OMB)推估出裸
露地PM10及PM2.5的本土化排放係數並探討兩者之影響關係。
本研究共完成9處共54點次實場裸露地植生前、後之PM10及PM2.5數據量測，經由數據統整，分析過後歸納出以下幾點結論，裸露地在氣溫12.4~28.9(℃)、風速0.1~12.4(m/s)及溼度53.0~77.1(RH,%)的環境條件下，營建裸露地的PM10排放係數平均為67 (g/m2/月)、PM2.5排放係數平均為35(g/m2/月)。植生前裸露地PM2.5/PM10之比值約為0.37，植生後裸露地約為0.42，其比值與土壤中細坋土占坋土的比例息息相關，在細坋土/坋土在0.1~2.5%之間，此比值增加一倍，營建裸露地之PM2.5/PM10約提升4.3%。裸露地中坋土含量在2.0%~22.0%之間，坋土含量增加一倍裸露地PM10排放係數約提升26.6%，PM2.5排放係數約提升14.7 %。土壤含水在10.0%~35.0%之間，土壤含水率增加一倍裸露地PM10排放係數約減少24.6%，PM2.5排放係數約減少15.7%。另植被率在20.5~78.7%時，地表平均風速削減率約為35.7%。植生草株高度在3~20(cm)時，經由實場量測及OMB法所推估出植生率在70.0%時，PM10防治成效可達28.5%、PM2.5 防治成效則略降至22.9%。

關鍵字

營建工地 ； 裸露地 ； PM10 ； PM2.5

並列摘要

As know vegetation is a good method to prevent the fugitive particle pollution emitted from large scale exposed area in construction sites. This paper studies characteristic of PM10 and PM2.5 emission by monitoring PM10 and PM2.5 54 times in 9 large scale exposed area in construction sites.
As the result of this study, the temperature in the range of 12.4~28.9(℃), wind velocity 0.1~12.4 (m/s) and humidity 53.0~77.1%, the average amount factor of PM10 emission was 67 (g/m2/month), PM2.5 emission was 35 (g/m2/month) respectively.
The mean PM2.5/PM10 ratio was 0.37 before vegetation. After vegetation the mean PM2.5/PM10 ratio was 0.42. The factor of PM emission was closely linked with the silt content of topsoil and the topsoil moisture content. The factor of PM10 emission increased 26.6% and PM2.5 emission increased 14.7% when the silt content of topsoil doubled. The factor of PM10 emission reduced 24.6% and PM2.5 emission reduced 15.7% when the topsoil moisture content doubled. The average wind speed reduced 35.7% when the vegetation ratio 20.5~78.7%. The paper utilized the concept of Overall Mass Balance (OMB) and field measurement to estimate the prevention efficiency of PM10 emission was 28.5%, PM2.5 emission was 22.9% when the vegetation ratio reached 70% and grass height 3~20(cm).

並列關鍵字

Construction Sites ； Exposed Area ； PM10 ； PM2.5

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