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《城市污水处理厂污泥对水中硫化物的吸附特性.pdf》由会员上传分享,免费在线阅读,更多相关内容在应用文档-天天文库。
1、中国环境科学2014,34(4):930~934ChinaEnvironmentalScience城市污水处理厂污泥对水中硫化物的吸附特性欧阳云,一,席劲瑛,,王智超,胡洪营1,2,3(1.清华大学环境学院,环境模拟与污染控制国家重点联合实验室,北京100084;2情华大学深圳研究生院,广东深圳518055;3.环境保护部环境微生物利用与安全控制重点实验室,北京100084)摘要:为研究城市污水厂污泥对水中硫化物的吸附特性,从3座城市污水处理厂采集回流污泥,考察了硫化物浓度、温度、pH值和其他离子对污泥吸附硫化物的影响结果表明,污水厂回流污泥对硫化物的吸附等
2、温线可以用Langmuir方程很好地描述,其最大硫化物吸附量为15-27mg/g-~污泥.在温度为5-35~C条件下,吸附量随温度上升而增加,表明该吸附为吸热过程.pH值在2-7范围内,pH值对污泥吸附硫化物的影响不大,当pH值低于2时,污泥对硫化物的吸附量随pH降低显著减小.硫化物可能以离子形式被污泥吸附,该过程为化学吸附过程.水中存在0-25mg/LCI或0~12mg/LSO不影响污泥对硫化物的吸附量.关键词:污泥;硫化物;吸附特性:污水处理厂中图分类号:X703.5文献标识码:A文章编号:1000~6923(2014)04—0930—05Adsorpt
3、ioncharacteristicsofsulfideontotheactivatedsludgeofmunicipalwastewatertreatmentplants.OUYANGYun,,XIJin.ying,。’,WANGZhi.chao,HUhong.ying,,(1.StateKeyLaboratoryofEnvironmentalSimulationandPollutionControl,TsinghuaUniversity,Beijing100084,China:2.GraduateSchoolatShenzhen,TsinghuaUnive
4、rsity,Shenzhen518055.China;3.StateEnvironmentalProtectionKeyLaboratoryofMicroorganismApplicationandRiskControl,Beijing100084,China).ChinaEnvironmentalScience,2014,34(4):930-934Abstract:Inthisstudy,activatedsludgesampleswerecollectedfrom3municipalwastewatertreatmentplants(WWTP)andth
5、eperformanceandimpactingfactorsofsulfidesadsorptionontotheactivatedsludgewereinvestigated.Theimpactingfactorsincludesulfidesconcentration,temperature,pHandotheranions.AdsorptionisothermofsulfideontotheactivatedsludgecanbewelldescribedbyLangmuirequation.Themaximumsulfideadsorptionca
6、pacitywasl5~27mg/g-drysludge.Atthetemperaturesrangingfrom5to35℃.adsorptioncapacityincreasedbytheriseintemperatureandthisimpliesthesulfidesadsorptionwasanendothermicprocess.ThepHvaluehadliRleefectontheadsorptioncapacityfrom2to7.Butthesulfidesadsorptioncapacitydecreasedsignificantlyw
7、henpHwaslowerthan2.Sulfideswereadsorbedbyactivatedsludgeasanions(HSandS)anditWasachemicaladsorptionprocess.CIrangingfrom0to25mg/LorSOirangingfrom0to12mg/Ldidnotafectthesulfidesadsorptioncapacity.Keywords:activatedsludge;sulfides;adsorptioncharacteristics;wastewatertreatmentplants近年
8、来,城市污水处理厂的恶臭污染问题制.在污水厂进水中投
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