-82-第46卷第1期非金属矿Vol.46No.12023年1月Non-MetallicMinesJanuary,2023氨基硅烷改性膨润土对Cr(Ⅵ)的吸附性能孙志勇1*于明远2吴喜军3张俊霞4孙剑平2(1榆林学院能源工程学院，陕西榆林719000；2沈阳建筑大学市政与环境工程学院，辽宁沈阳110168；3榆林学院建筑工程学院，陕西榆林719000；4邵阳学院机械与能源工程学院，湖南邵阳422000）摘要在膨润土（Bent）表面接枝3-氨丙基三乙氧基硅烷（APTES），制备氨基改性膨润土（APTES/Bent），考察其对Cr(VI)的吸附性能。结果表明，APTES/Bent吸附Cr(VI)最佳pH值为2；拟二级动力学模型对吸附拟合更好；Langmuir模型可较好地拟合Cr(VI)在APTES/Bent上的等温吸附过程；热力学分析表明该吸附过程属自发吸热过程；5次循环再生后，APTES/Bent对Cr(VI)仍有较好的吸附量，吸附量为29.47mg/g。APTES/Bent是一种具有应用潜力的Cr(VI)吸附剂。关键词氨基硅烷；膨润土；Cr(VI)；吸附中图分类号：X703；TQ424文献标志码：A文章编号：1000-8098(2023)01-0082-04AdsorptionPropertiesofAminosilane-ModifiedBentoniteforCr(Ⅵ)SunZhiyong1*YuMingyuan2WuXijun3ZhangJunxia4SunJianping2(1SchoolofEnergyEngineering,YulinUniversity,Yulin,Shaanxi719000;2SchoolofMunicipalandEnvironmentalEngineering,ShenyangJianzhuUniversity,Shenyang,Liaoning110168;3SchoolofArchitectureandEngineering,YulinUniversity,Yulin,Shaanxi719000;4SchoolofMechanicalandEnergyEngineering,ShaoyangUniversity,Shaoyang,Hu’nan422000)AbstractAmino-modifiedbentonite(APTES/Bent)waspreparedbygrafting3-aminopropyltriethoxysilane(APTES)onthesurfaceofbentonite(Bent),anditsadsorptionperformanceforCr(VI)wasinvestigated.TheresultsshowedthatAPTESwassuccessfullygraftedonbentonite;theoptimumpHfortheadsorptionofCr(VI)byAPTES/Bentwas2;thepseudo-second-orderkineticmodelfittedbetterfortheadsorption;theLangmuirmodelcouldbetterfitCr(VI)adsorptionisothermprocessonAPTES/Bent;thermodynamicanalysisshowedthattheadsorptionprocesswasaspontaneousendothermicprocess;after5cyclesofregeneration,APTES/BentstillhadagoodadsorptioncapacityforCr(VI),whichwas29.47mg/g,APTES/BentisapotentialCr(VI)adsorbent.Keywordsaminosilane;bentonite;Cr(VI);adsorption铬是环境中最常见的金属污染物之一。Cr(VI)...
