- 學位論文
片狀零價鐵與硫化亞鐵觸發過硫酸鹽反應處理實際染整廢水之脫色效能研究
Zero-Valent Iron Aggregates and Iron Sulfide Aggregate Activated Persulfate Decolorization of Real Textile Wastewater
摘要
本研究利用片狀零價鐵(Fe0)及硫化亞鐵(FeS)活化過硫酸鹽(Persulfate,PS)反應，探討該反應對實際染整廢水之脫色效能。研究發現過硫酸鹽反應可有效處理實際染整廢水之真色度，其影響因子包括pH、催化劑添加量、PS濃度、超聲波(Ultrasound,US)輸出功率與溫度，並利用不同程序比較其最佳條件，包括PS、PS/US、PS/Fe0 (FeS)、PS/Fe0 (FeS)/heat與PS/Fe0 (FeS)/US。研究結果顯示，低色度廢水利用PS/Fe0結合熱(PS/Fe0/50°C)或US (PS/Fe0/US)可提升其脫色效能。提高PS濃度可進一步提升PS/Fe0/US脫色效率。於實驗條件PS 1×10-3 M、Fe0 1 g/L、50°C、pH 3.0下，染整廢水(ADMI 1100)經PS/Fe0/US處理30 min後，可達到80%脫色效率；高色度廢水僅能利用熱能(PS/FeS/50°C)提升脫色效能，於實驗條件PS 2.5×10-3 M、FeS 1 g/L、50°C、pH 3.0下，可達到92%脫色效率。催化劑中Fe0與FeS催化效果並無太大差別，但Fe0回收方便且可重複使用多次，比FeS更佳適用於廢水處理。本研究證實PS氧化技術可快速氧化破壞廢水中的染料分子結構達成脫色效果外，也可去除大部份COD，處理後之廢水ADMI遠低於法規標準。
並列摘要
Zero-valent iron (Fe0) and ferrus sulfite (FeS) were used to activate persulfate (PS) for the decolorizatio of real textile wastewaters. Findings show such persulfate reaction could effectively treat the true color of textile wastewaters. Key factors affecting persulfate process, including pH persulfate and catalysts dosages, ultrasound (US), and temperature were studied. Process including, PS, PS/US, PS/Fe0 (FeS), PS/Fe0 (FeS)/heat, and PS/Fe0 were compared for the decolorization efficiency. Under a condition of initial ADMI 1100, PS 1×10-3 M, Fe0 1 g/L, 50°C, pH 3.0, a decolorization of 80% was achieved in the PS/Fe0/US process. Under the same condition, the PS/FeS/50°C could promote decolorization efficiency upto 92%. Both Fe0 and FeS coluld effectively remove color from wastewater, however Fe0 is able to reclycle several times, which is a better choice for wastewater treatment. Findings indicated that Fe0 and FeS activated PS process could rapidly detructe the dye molecular and remove COD from real textile water to reach the effluent standard.