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1、Withthegreatvarietyof&values,tetracyclinewasadsorbedmorestronglyonmontmorillonitethanonkaolinite.Inmeantime,adsorptionofTContwoclaysdecreasedgraduallywiththeincreaseofnaturalcationconcentrationsinsolution,suggestingthatthesorptionprocesswaslargelydominatedbycationexchange.Moreover,thedifferentcati
2、onscouldresultintheapparentdiffereneeofTCsorptionwhencationswithhighervalenciesshowedstrongeradsorbiltyonthesurfacesofactivesorptionsitesbythefollowingorder:M3+(AI3+)>M2+(Ca2+)>M+(K+).Inaddition,theresultsshowsabsorptionoftetracyclinedecreasedwiththeincreasingofpH.StudieshavealsoshownthattheTC+ion
3、scanobviouslyincreasetheabsorptionofTConsoils.Significantrelationshipbetweenpartitioncoefficientsandproportionofionizationwerealsoverified.Chapter4?AdsorptionofCiprofloxacinondifferentSoilsBatchequilibriumexperimentswereusedtorevealtheadsorptionbehaviorofciprofloxacinonthreedifferentsoils,Theresul
4、tsshowedthattheadsorptionisothermswerewelldescribedbyFreundlichmodel.Thesoilthatcontainshigherorganicmatterhaveabetterabsorptionofciprofloxacin,whichisascribedtothecombinationwithciprofloxacinbycationexchange,bridgebondandhydrogenbondingofthenegativechargedofhumicacid,Itisalsoaimportantfactorthatt
5、hecationexchangecapacitiesforadsorption..Inaddition,thesorptioncoefficientsofciprofloxacininsoildecreasedwiththeincreaseofpHvalueinrangeof4.5to9.0.Chapter5?InfluenceofinsolubilizedhumicacidonCiprofloxacinAdsorption.Insolublehumicacid(IHA)isprepared,andtheremovalofciprofloxacinintheaqueoussolutions
6、byadsorptionontoIHAisinvestigatedundertheconditionsofconcentrationofnaturalcationsinsolution,differentcationsandpHcouldresultintheapparentdifferenceofciprofloxacinsorption,TheexperimentalresultsprovethatadsorptionequilibriumfitswellwiththeFreudlichadsorptionisotherm.Withinacertainconcentrationrang
7、e,IHAshowsthestrongadsorptionability,adsorptionofciprofloxacinonIHAdecreasedgraduallywiththeincreaseofnaturalcationconcentrationsinsolution‘suggestingthatthesorptionprocesswaslargelydominatedbycationexchange.Inme
