_Fered-Fenton法处理石化废水反渗透浓水

第9卷第6期环境工程学报Vol．9，No．62015年6月ChineseJournalofEnvironmentalEngineeringJun．2015Fered-Fenton法处理石化废水反渗透浓水范冬琪1，2魏健2，3宋永会2，3*曾萍2，3崔晓宇1，2，3徐东耀1(1．中国矿业大学(北京)化学与环境工程学院，北京100083;2．中国环境科学研究院城市水环境科技创新基地，北京100012;3．中国环境科学研究院环境基准与风险评估国家重点实验室，北京100012)摘要以Ti金属网为阴极、Ti负载ＲuO2金属网为阳极，构建Fered-Fenton反应系统，处理石化废水反渗透膜法浓水。考察H2O2浓度、Fe2+浓度、初始pH值和电流密度等因素对废水处理效果的影响，并分析了废水可生化性及污染物降解规律。结果表明，在H2O2浓度为75．0mmol/L，Fe2+浓度为7．5mmol/L，初始pH值为3．0，电流密度为5．1mA/cm2的条件下，反应120min后废水TOC可由198．2mg/L降到99．6mg/L，有机污染物矿化率达到49．7%，BOD5/COD由0．11提高至0．31，废水可生化性明显改善。三维荧光光谱(EEM)分析结果表明，Fered-Fenton法对废水中类蛋白、类富里酸等荧光有机物去除率达到66．7%，该类大分子难降解有机物的氧化降解有利于改善废水可生化性，为进一步的生化处理创造了良好的条件。关键词反渗透浓水Fered-Fenton可生化性三维荧光光谱中图分类号X703文献标识码A文章编号1673-9108(2015)06-2653-07TreatmentofreverseosmosisconcentrateofpetrochemicalwastewaterbyFered-FentonprocessFanDongqi1，2WeiJian2，3SongYonghui2，3ZengPing2，3CuiXiaoyu1，2，3XuDongyao1(1．SchoolofChemicalandEnvironmentalEngineering，ChinaUniversityofMiningandTechnology，Beijing100083，China;2．ScientificandTechnologicalInnovationBaseofUrbanWaterEnvironmentalＲesearch，ChineseＲesearchAcademyofEnvironmentalSciences，Beijing100012，China;3．StateKeyLaboratoryofEnvironmentalCriteriaandＲiskAssessment，ChineseＲesearchAcademyofEnvironmentalSciences，Beijing100012，China)AbstractAFered-FentonsystemusingTisheetascathodeandＲuO2/Tiasanodewasestablishedfortreatingreverseosmosisconcentrateofpetrochemicalwastewater．TheeffectsofH2O2andFe2+concentration，in-itialpHandappliedcurrentontreatmentefficiencywereinvestigated．Furthermore，thevariationsofbiodegrad-abilityandcharacteristicpollutantswerealsoanalyzed．TheresultsshowedthattheoptimumreactionconditionswereH2O2dosageof75．0mmol/L，Fe2+dosageof7．5mmol/L，initialpHvalueof3．0andcurrentintensityof5．1mA/cm2．Afterreactionof120min，theTOCconcentrationdecreasedfrom198．2mg/Lto99．6mg/L，correspondingtoorganicsmineralizationefficiencyof49．7%．TheorganicpollutantsconcentrationsignificantlydecreasedandthebiodegradabilitywasobviouslyimprovedwiththeBOD5/CODratioincreasingfrom0．11to0．31．Theexcitation-emissionmatrix(EEM)sp