2026-11-092026-11-09https://scholars.csmu.edu.tw/handle/123456789/38662Many industrial wastewaters contain recalcitrant and toxic organic pollutants, such as phenol, chlorinated phenol, PAHs, dyes and pesticides. Those organics can not be directly degraded in traditional aerobic treatment. How to degrade those recalcitrant pollutants with low-cost technique is a very importantly environmental issue. The textile section generates a huge amount of wastewater with high concentrations of unfixed toxic azo and anthraquinone dyes. The dyes are of great concern because of their toxicity and mutagenicity. A low-cost and green chemistry practice, Chelatant-Fe0-Air technique is employed to degrade textile wastewater. The technique is operated under room temperature and pressure. The zero-valent iron can produce the hydroxyl radical and ferryl species in the presence of chelatants under aerobic condition. The strong oxidant can effectively degrade organics and increase the bioavailability of wastewater. Two kinds of wastewater are used in this study (1) the simulated dye solution is used to investigate the organic destruction mechanisms by this technique and (2) the real wastewater from a textile plant is employed to evaluate the optimal operating condition for textile wastewater treatment. Two dyes, azo C.I. Reactive Black 5 and anthraquinone C.I. Reactive Blue 4 are selected as the target dyes. Three kinds of chelatants, EDTA, EDDS, and citric acid also are selected to evaluate their effects on dye degradation by this textile. EDDS and citric acid are select because they are easily biodegradable. The operating parameters include dye concentrations, chelatant concentrations, zero-valent iron doses, solution pH, solution temperature, and the effectiveness of recycled iron. The color, COD, BOD5, UV-visible spectrum, GC/MS, Microtox test, total iron and ferrous concentrations are measured. Different textile wastewater are also tested, including high concentrations from dying process, raw wastewater from conditioning tank, and effluent from secondary treatment unit. The cost analysis and feasibility are also conducted. The results of this study can provide the value information on textile and other industrial wastewater treatment by Chelatant-Fe0-Air technique.許多工業廢水含生物難分解及生物毒性污染物如酚、氯酚、染料、多環 芳香烴，農藥廢水，大部分無法直接以傳統好氧生物法直接處理，如何以低 成本方法分解有機物為一重要議題。染整廢水不僅量大及含高濃度20-50% 未固化染料，為具生物難分解性及生物毒性廢水重要來源之一。 本研究選取正發展之低成本綠色技術，螯合劑-零價鐵-空氣技術，評估 其對染整廢水處理成效。本技術可在常溫及常壓情況下操作，螯合劑能促進 零價鐵自氧化作用，進而產生非化學特定性強氧化劑ferryl species，除可有 效降解有機物，並可增加污染物生物可分解性。 本研究染料廢水分二種(1)自行配置模擬染料廢水-探討本技術之分解機 制，(2)實廠廢水-探討技術可行性及成本分析。模擬廢水採用二種常用染料， 分別為偶氮染料C.I. Reactive Black 5 及蒽琨染料C.I. Reactive Blue 4，螯合 劑選取EDTA，EDDS、citric acid，後二者為生物易分解性。探討操作變數 包括(1)染料濃度，(2)螯合劑濃度，(3)零價鐵劑量，(4) pH 值，(5)水溫及(6) 鐵重覆使用，分析項目包括廢水色度、COD、BOD5、UV-Vis 圖譜、GC/MS 分析、總鐵、二價鐵濃度及生物毒性(Microtox test, Ames test)等。實廠廢水 選取三種廢水包括製程出流高濃度廢水、進流水及二級處理出流水，評估處 理效果以獲取最佳操作參數，並進行成本分析。本計畫研究成果可做為染整 廠及其他類型工業廢水處理重要參考依據。零價鐵螯合劑染整廢水偶氮染料蒽琨染料生物可分解性生物毒性Zero-Valent IronChelatantTextile wastewaterAzo dyeAnthraquinonedyeBiodegradableBiotoxicityProject