生活污水中环境雌激素的厌氧消化行为特征及环境风险评价_王宇

生活污水中环境雌激素的厌氧消化行为特征及环境风险评价王宇1,袁涛1＊,胡江泳2(1.上海交通大学环境科学与工程学院,上海200240;2.新加坡国立大学环境科学与工程系,新加坡119260)摘要:为了研究生活污水中典型环境雌激素(estrogenicendocrinedisruptors,EEDs)在上流式厌氧污泥床(upflowanaerobicsludgeblanket,UASB)和厌氧滤池(anaerobicfilter,AF)中的行为特征和去除机制,采用固相萃取(SPE)-LCMSMS分析方法,测定了9种EEDs的浓度和污泥吸附量,利用壬基酚当量(nonylphenolequivalentquantity,NEQ)进行了环境风险评价.结果表明,厌氧污泥对各EEDs的吸附能力与该物质的lgKow和分子长度相关;UASB对雌二醇(E2)和大豆苷元的去除率分别达83.2%和90.4%,AF对染料木素的去除率达81.6%;9种EEDs在UASB和AF中的污泥-水分配系数(Kp)分别为0.15～23.3和0.05～159.67;综合分析去除率和Kp值数据,揭示了生物降解是大豆苷元、染料木素、双酚A(BPA)和雌三醇(E3)的主要去除途径;出水的NEQ均小于美国EPA的壬基酚水质标准(28μg·L-1,小时平均浓度标准),表明EEDs经厌氧处理后其环境风险有所降低.关键词:环境雌激素;上流式厌氧污泥床;厌氧滤池;污泥吸附;去除;环境风险评价中图分类号:X505文献标识码:A文章编号:0250-3301(2009)06-1716-06收稿日期:2008-07-10;修订日期:2008-10-06基金项目:国家自然科学基金项目(50608050)作者简介:王宇(1984～),女,硕士,主要研究方向为水处理及环境激素,E-mail:winnie0225@gmail.com＊通讯联系人,E-mail:taoyuan@sjtu.edu.cnBehaviorsandEnvironmentalRiskAssessmentofEstrogenicEndocrineDisruptorsinAnaerobicDomesticWastewaterTreatmentWANGYu1,YUANTao1,HUJiang-yong2(1.SchoolofEnvironmentalScienceandEngineering,ShanghaiJiaotongUniversity,Shanghai200240,China;2.DivisionofEnvironmentalScienceandEngineering,NationalUniversityofSingapore,Singapore119260,Singapore)Abstract:Solidphaseextraction-LCMSMSdetectionmethodwasappliedtostudytheconcentrationsandsludgeadsorptionsofnineestrogenicendocrinedisruptors(EEDs)inanupflowanaerobicsludgeblanket(UASB)andananaerobicfilter(AF).Nonylphenolequivalentquantity(NEQ)wascalculatedtoevaluatetheenvironmentalriskoftheEEDs.TheresultsshowanaerobicsludgeadsorptionhaspositivecorrelationwithlgKowandmolecularlengthofEEDs.17β-estradiol(E2)anddaidzeinreached83.2%and90.4%removalratesinUASB,respectively.GenisteininAFisremovedmorethan80%.Thesludge-waterpartitioncoefficient(Kp)ofnineEEDsrangedfrom0.15-23.3inUASBand0.05-159.67inAF.Biodegradationcouldbethemaineliminationpathwayfordaidzein,genistein,bisphenolAandestriol,bycombininganalysisofremovaldataandKpvalues.EnvironmentalriskofEEDswasreducedafteranaerobictreatment,aseffluentNEQwasbelowtheUSEPAnonylphenolcriteria(2