乙酸膨润土对亚甲基蓝的吸附研究.docx

乙酸膨润土对亚甲基蓝的吸附研究
摘要：
本研究旨在探究乙酸膨润土对亚甲基蓝的吸附特性，通过批处理实验研究了乙酸膨润土对亚甲基蓝的吸附行为及其影响因素。实验结果表明，乙酸膨润土对亚甲基蓝具有较好的吸附能力，且吸附过程符合准二级动力学模型，呈现出多层吸附特性。此外，温度和pH值对乙酸膨润土对亚甲基蓝的吸附行为具有一定影响，其中温度升高有利于亚甲基蓝的吸附，而较酸性的环境则能促进乙酸膨润土对亚甲基蓝的吸附。
关键词：乙酸膨润土；亚甲基蓝；吸附特性；准二级动力学模型；影响因素
Abstract：
Thisresearchaimstoinvestigatetheadsorptioncharacteristicsofethanoicacidmodifiedbentoniteonmethyleneblue.Abatchexperimentwasconductedtostudytheadsorptionbehaviorofethanoicacidmodifiedbentoniteonmethyleneblueanditsinfluencingfactors.Theresultsshowedthatethanoicacidmodifiedbentoniteexhibitedgoodadsorptioncapacityformethyleneblueandtheadsorptionprocessfollowedapseudo-second-orderkineticmodel,presentingmulti-layeradsorptioncharacteristics.Inaddition,temperatureandpHhadacertaininfluenceontheadsorptionbehaviorofethanoicacidmodifiedbentoniteonmethyleneblue.Thehighertemperaturewasbeneficialtotheadsorptionofmethyleneblue,whiletheacidicenvironmentcouldpromotetheadsorptionofmethylenebluebyethanoicacidmodifiedbentonite.
Keywords:ethanoicacidmodifiedbentonite;methyleneblue;adsorptioncharacteristics;pseudo-second-orderkineticmodel;influencingfactors
Introduction:
Withtherapiddevelopmentofindustryandagriculture,alargeamountofdyesisdischargedintotheenvironment,whichnotonlyseriouslypollutesthewaterenvironmentbutalsoaffectshumanhealth.Methyleneblue(MB)isaheterocycliccationicdye,whichiswidelyusedinindustrialproductionduetoitslowprice,highstability,andgooddyeingproperties.However,itisapotentialcarcinogenandcancauseharmtohumanseveninsmallamounts.Therefore,itisessentialtoexploreeffectivemethodstoreduceMBinwaterbodies.
Adsorptionisawidelyusedmethodforremovingdyesfromwaterbodies,andbentoniteisamongthemostcommonlyusedadsorbentsinrecentyearsbecauseofitshighspecificsurfacearea,abundantactivesites,andexcellentadsorptionperformance.Ethanoicacidmodifiedbentonite,atypeofbentonitethathasundergoneacidmodification,hasabetteradsorptioneffectthanconventionalbentonite.Inthisstudy,ethanoicacidmodifiedbentonitewasusedasanadsorbenttoinvestigateitsadsorptionperform