中文摘要：

采用混凝-Fenton氧化-Fe0还原工艺预处理高浓度硝基苯废水,考察各反应阶段硝基苯去除效果及影响因素。研究表明,聚铁混凝性能优于聚铝;初始COD为17 350 mg/L、硝基苯浓度为10 050 mg/L的废水,在pH=4,聚铁投加浓度3 300 mg/L时,COD和硝基苯去除率分别为63%和62%;混凝沉降后的上清液用Fenton试剂氧化,可在较宽pH（3～6）范围内降解硝基苯,当H2O2（30%）浓度为6 000 mg/L,Fe2＋浓度为168 mg/L时,氧化效率最高;聚铁混凝-Fenton氧化后的出水用Fe0还原,最佳还原条件为：pH=3,Fe0浓度1 500 mg/L。原水经聚铁混凝-Fenton氧化-Fe0还原后,COD和硝基苯总去除率分别达90%和98%,总药剂成本约12.4元/t。处理后废水硝基苯浓度为168 mg/L,适宜进行后续的厌氧-好氧生物处理。

英文摘要：

A process combined coagulation-Fenton oxidation-Fe0 reduction was used for pretreatment of high-concentration nitrobenzene-containing wastewater.The nitrobenzene removal rate and influence factors were studied during different treatment stages.Results indicated that PFS was better than PAC for coagulation.While the initial concentrations of nitrobenzene and COD were 10 050 mg/L and 17 350 mg/L,respectively,the removal rates of nitrobenzene and COD reached 62% and 63%,respectively with dosage of PFS 3 300 mg/L at pH 4.Fenton oxidation was carried on with 6 000 mg/L （30%）,168 mg/L ,and pH 3~6.The reduction experiments using Fe0 showed that the optimal reduction conditions were pH 3 and dosage of Fe0 1 500 mg/L.Through the combined process,the total removal rates of nitrobenzene and COD reached 98% and 90%,respectively,and all reagents cost of the process was about RMB$12.4 per ton.The wastewater containing 168 mg/L nitrobenzene was suitable for further anaerobic-aerobic biological treatment.