沸石覆盖原位控制湖泊内源中等活性有机磷迁移转化

中国环境科学2015，35(2)：550-557ChinaEnvironmentalScience沸石覆盖原位控制湖泊内源中等活性有机磷迁移转化孙士权，蒋昌波，赵刚，聂小保，谭万春，万俊力，余关龙(长沙理工大学，水沙科学与水灾害防治湖南省重点实验室，湖南长沙410114)摘要：为揭示湖泊内源中等活性有机磷(MLOP)控制与释放发生机制，采用室内模拟试验，研究沸石覆盖原位控制湖泊内源MLOP迁移转化影响因子．结果表明：酸性水体促进内源MLOP迁移，碱性条件下抑制其转化，不同pH值试验水体沉积物中内源MLOP相对浓度~J：[MLOP／TP]p．s>[MLOPFFP]Ptt7>[MLOP／TP]pH6；*~／／t度明显提高内源MLOP迁移水平，低温水体相对高温水体沉积物中内源MLOP含量较低，5C条件下内源MLOP迁移表观量最大，其随时间迁移量里幂函数关系，可表示为【MLOP厂rP】=0．282370(为O．9709)；好氧或厌氧条件_F，内源MLOP均发生迁移，且迁移特征和影响效能高度一致，迁移平衡后好氧环境内源MLOP和厌氧内源MLOP相对浓度呈线性相关，可表示为[MLOP／TP]~l=l0884[MLOP／TP]~：M一O0271(R为99895)；光照因子促使内源MLOP迁移．而避光和沸石粒径因素对内源MLOP迁移影响较小；底栖生物颤蚓通过爬行、摄食、掘穴、栖所建造及分泌排泄等一系列活动影响内源MLOP迁移．沸石原位控制湖泊内源MLOP迁移转化效能较弱．关键词：沸石原位控制：沉积物；中等活性有机磷：迁移转化中图分类号：X703文献标识码：A文章编号：1000—6923(2015)02—0550—08Influencingfactorsofzeolitein—situremediationsystemtocontrolmoderatelylabileorganicphosphorusmigrationandtransformationinshallowwater．SUNShi—quan，JIANGChang—bo。，ZHAOGang，NIEXiao—bao，TANWlan-chun，WANJun—li，YUGuan—long(TheWaterWandScienceandtheWaterDisasterPreventandControlKeyLaboratoryofHunanProvince，ChangshaUniversityofScienceandTechnology,Changsha410114，China)．ChinaEnvironmentalScience，2015，35(2)：550-557Abstract：Tounravelthemechanismofthecontrolandreleaseoftheendogenousmoderatelylabileorganicphosphorus(MLOP)inthelake，thefactor,whichinfluencedthemigrationandtransformationofendogenousMLOPusingin—situzeolitecappingcontrol，wasstudied．Theresultsofthelaboratorysimulationofin—situzeolitecontrolingendogenouspollutionsinlakesindicatethatacidicwaterbodiespromotedendogenousMLOPmigrationwhilealkalineconditionshinderedit．andtherelativeconcentrationsofendogenousMLOPinsediments，underdiferentpHconditions，were【MLOP／TP]pH8>【MLOP／TP]pH7>[MLOP／TP]pn6；temperaturesignificantlyincreasedthemigrationlevelofendogenousML0D：thecontentofendogenousMLOPinsedimentsinlow．temperaturewaterbodieswaslowerthanthatinhigh—temperatureones．Onconditionof5℃，theendogenousMLOPshowedthehighestapparentmigration，anditalsopresentedapowerfunctionrelationshipwiththemigrationovertime．whichcouldbedescribedas[MLOP／TP]=0．