DSpace community: 環境工程與科學系(所)

製備多金屬氧酸結合相轉移催化劑負載於磁性金屬有機框架材之氧化脫硫系統應用於再生油品能源化再利用之研究

title: 製備多金屬氧酸結合相轉移催化劑負載於磁性金屬有機框架材之氧化脫硫系統應用於再生油品能源化再利用之研究 abstract: 在社會與經濟發展方面，本研究為解決油品氧化脫硫技術應用於實場時，氧化劑成本較高且不易回收及其工業化系統較為複雜等問題，將多金屬氧酸鹽催化劑及相轉移催化劑負載於含鐵之改質性多孔金屬有機載體上，形成固體性之負載型催化劑，並將其應用於快速攪拌輔助氧化脫硫試驗；此技術將可改善回收業者建廠成本過高的問題並提升再生油品之品質，期能落實回收廢棄油品之再利用管道及符合廢棄物管理欲建立「資源循環型社會」之目的。在學術發展方面，本研究針對每一反應模式建立其最佳化之操作條件及主要反應機制；並將此實驗結果應用於再生油品，建?實驗室模場試驗模組，提供?多最佳化之操作數據，以?日後實場建置之設計與操作控制。

名竹盆地的地下水流場研究

title: 名竹盆地的地下水流場研究 abstract: 台灣的水資源日益缺乏, 地下水資源的開發也越來越重要, 名竹盆地是少數有開發潛力的含水層, 本研究調查其地下水流場, 以了解其補注及流動等基本資料, 有助於評估及管理此寶貴的地下水資源

大氣臭氧及光化氣膠分徑組成與生質燃燒氣膠持久性自由基存在潛勢

title: 大氣臭氧及光化氣膠分徑組成與生質燃燒氣膠持久性自由基存在潛勢 abstract: 大氣氣膠懸浮微粒及臭氧是我國空氣品質長期關切的兩類主要指標污染物，均持續具有化學活性與高反應性，對健康有極大影響，其中氣膠持久性自由基(persistent free radicals, PFRs)伴隨在不同微粒尺寸與氣膠化學組成互有關連而有濃度存衰，被視為一種新興環境有害物質，尤與燃燒排放關連。本計畫在潛在污染季節及代表性地區探討大氣臭氧、分徑氣膠PFRs存衰濃度潛勢與氣狀前驅物及氣膠化學特性與超細微粒與氣膠數目粒徑分布成果，結合不同空品模式對微粒來源釐清有重要學術貢獻，對環保署釐訂PM2.5空品管制與減量策略及降低國人受PM2.5所致的健康風險具有參考價值。

Exploring nanoparticle emissions and size distributions during incense burning and filtration in an indoor space

title: Exploring nanoparticle emissions and size distributions during incense burning and filtration in an indoor space abstract: Indoor air pollution is a critical health issue. We studied particle emissions, concentration changes and size distribution mechanisms using an indoor space with air quality monitors, incense stick burning, and ventilation. Temporal changes in the concentrations of particles with sizes of 10 nm to 10 mu m were monitored. Our findings show that particles affecting particle number concentration (PNC) were mainly in the Aitken mode (50-100 nm) and accumulation mode I (100-200 nm). Particle surface area concentration (PAC) was primarily in the 100-300 nm range, while particle volume concentration (PVC) was in the 100-200 nm and 300-1000 nm ranges. After extinguishing the incense sticks, ventilation was initiated. The ventilation period was split into FAO(1-3) (i.e., the first 3 min, 1-3 min of ventilation system operation) and FAO(4-15) (i.e., the last 12 min, 4-15 min of ventilation system operation). During FAO(1-3), particle concentrations increased by 18.3 to 21.5%. This rise was due to the initial activation of the ventilation system, dispersing settled particles (mostly >= 41.2 nm) into the air. The FAO(4-15)/FAO(1-3) ratio for 12.3-2489.3 nm particles was always < 1, indicating that as the ventilation continued, it effectively removed particles of < 2.5 mu m. After subsequent ventilation of 15-min operation, total PNC, PAC, and PVC were 70.3%, 70.0%, and 67.8% lower than during FAO(1-3) and the particle number mode diameter was 106.0 nm, with geometric standard deviations of 1.50 and 1.51 (left and right), indicating that the ventilation system was successful in removing smoke particles of all sizes simultaneously and evenly and achieved an approximate total removal efficiency of 70%, effectively filtering particles and reducing indoor air pollution.