Fenton氧化法预处理显影废水的研究

摘要显影废水是一种典型的高浓度高盐度的有机废水，已被列入《国家危险废物名录》。若不经处理就排入环境将对环境造成极大污染。Fenton 氧化法是一种高级氧化技术，利用 Fe2+/H2O2 组合而成的 Fenton 试剂，具有氧化效率高，不会造成二次污染等特点，适于处理难处理废水。本研究采用 Fenton 法预处理难处理的显影废水以提高其可生化性。比较了 Fenton 试剂与高锰酸钾和次氯酸钠对显影废水的氧化处理效果，考察了废水的初始 pH、亚铁离子和过氧化氢的质量比、Fenton 试剂投加量、反应时间等83163

对 Fenton 法氧化效率的影响。实验结果表明，在高锰酸钾和次氯酸钠氧化对显影废水 COD 的去除率明显小于 Fenton 试剂。Fenton 试剂氧化处理显影废水的最优条件为 pH 等于 3、Fe2+/H2O2 质量比为 1：1、Fe2+和 H2O2 的投加浓度为 3600mg/L、反应时间 10min。此条件下 COD 去除率为 59。9%，出水 COD 浓度降为 5288 mg/L。

对一段处理的出水进行二段 Fenton 氧化。实验结果表明，二段 Fenton 氧化的最优条件是，Fe2+和 H2O2 的投加浓度为 1600mg/L、反应时间 30min，出水 COD 降至 3400mg/L 左右，经过两级 Fenton 氧化，COD 总去除率为 74%。

毕业论文关键词：显影废水；Fenton 试剂；氧化；过氧化氢

Abstract Development wastewater is a typical organic wastewater of high concentration and high salinity, and has been listed in National Hazardous Waste List。 It will cause severe contamination if development wastewater was discharged without any treatment。 Fenton oxidation process is a kind of advanced oxidation processes using Fenton reagent combined Fe2+and H2O2, which has various advantage such as high oxidation efficiency and free secondary pollution, and is suitable for treating refractory wastewater。 This

research used Fenton process for pretreatment of development wastewater so as to improving its biodegradability。 The oxidation efficiency of Fenton reagent was compared with the efficiency of potassium permanganate and sodium hypochlorite。 The effects of operation conditions, such as pH, Fe2+/H2O2 mass ratio, Fenton reagent dosage and reacting time, on oxidation efficiency of Fenton process was studied。 The results show, the

oxidation efficiency of potassium permanganate and sodium hypochlorite was significantly lower than Fenton process。 The optimal conditions for Fenton oxidation process was pH=3, Fe2+/H2O2 mass ratio 1:1, Fe2+and H2O2 dosage 3600 mg/L, reacting time 10 min。 The COD removal under optimal conditions was 59。9%, the COD concentration of effluent was decreased to 5288 mg/L。

Secondary Fenton oxidation process was applied to effluent of first stage。 The result shows, the optimal operation conditions of secondary process was, Fe2+and H2O2 dosage 1600 mg/L, reacting time 30 min, the COD of effluent was decreased to 3400 mg/L, by two steps Fenton oxidation, the total removal ratio of COD was 74%。

Keywords: Development wastewater；Fenton reagent；Oxidation；Hydrogen peroxide

摘要 I

第一章绪论 1

1。1。显影原理与显影废水来源 1

1。1。1。显影原理 1

1。1。2。显影废水的主要来源 1

1。2。显影废水的成分及对环境的危害 2

1。3。显影废水的处理技术进展 4

1。3。1。湿式氧化法 5

1。3。2。水解酸化-氧化法 Fenton氧化法预处理显影废水的研究:http://www.youerw.com/huaxue/lunwen_97878.html