本研究旨在實際瞭解臺灣北部地區街道塵坋土特性,其主要是以臺灣北部六個縣市各選定5條代表性道路進行街道塵坋土採樣,以及以桃園縣為代表執行每月份30條道路街道塵坋土採樣。街道塵坋土採樣依照U. S. EPA AP-42 鋪面道路街塵之採樣方法執行,再依ASTM-C136標準篩分法得到各粒徑之塵土量,由討論街道塵坋土與影響因子相關係,並透過道路分級與目視判定及採樣分析歸納出道路等級,透過街塵特性之探討,找出其可行道路髒污等級提升方案。 經研究結果可以得知各縣市之街塵(所有粒徑塵土)荷重為0.738 ~ 14.176 g/m2,坋土負荷為0.046 ~ 1.114 g/m2,各粒徑重量百分比為,坋土(<75 μm)佔9.6 ± 1.6%、粒徑在75 ~ 297 μm者佔27.9 ± 5.9%、粒徑在297 ~ 850 μm者佔32.6 ± 4.5%、粒徑在850 μm以上者佔30.0 ± 5.2%。從桃園縣每月之平均街塵荷重值與平均坋土荷重值來討論,省道路之每月平均街塵荷重變異性較小,街塵荷重值為2.187 ± 0.836g/m2,縣道之每月平均街塵荷重值為2.358 ± 0.985 g/m2,鄉/市道之每月平均街塵荷重變異性較大,街塵荷重值為2.536 ± 1.098 g/m2,以坋土荷重方面進行比較,省道之坋土荷重值為0.272 ± 0.127 g/m2,鄉/市道之坋土荷重值為0.351 ± 0.198 g/m2,縣道之坋土荷重值為0.304 ± 0.163 g/m2。
Understanding the characteristic of street dust in Northern Taiwan Area by two strategies. Firstly, collecting six county street dust samples in Northern Taiwan. Secondly, selecting 30 roads and collecting the street dust samples in Taoyuan County. Lastly. The collection of street dust samples according to U. S. EPA AP-42 Procedures.There are based on a review of American Society for Testing and Materials (ASTM) methods C-136. The amount of street dust loading are between 0.738 to 14.176 g/m2. The size of weight dust size is 9.6 ± 1.6 wt% with <75 μm, dust size is 27.9 ± 5.9 wt% with 75 ~ 297 μm, dust size is 32.6 ± 4.5 wt% with 297 ~ 850 μm and dust size is 30.0 ± 5.2% with >850 μm. In Taoyuan County, the average per month from the road dust load and average silt load value to the discussion, Township / City street dust roads of the average monthly load variability smaller, road dust load is 2.892 ± 0.786 g/m2, County Road dust load of the average monthly is 3.621 ± 0.897 g/m2, Provincial Road dust load of the average monthly load variability of the larger road dust, road dust load is 3.787 ± 1.179 g/m2, in order to compare aspects of silt dust load, Provincial silt load is 0.421 ± 0.143 g/m2, County Road silt load is 0.457 ± 0.133 g/m2, Township / City silt load is 0.383 ± 0.132 g/m2.