氨基改性坡缕石对金属阳离子的吸附选择性特征
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关键词：氨基；坡缕石；吸附；选择性
中图分类号：X703 文献标志码：A 文章编号：1672-2043（2026）01-0199-14 doi：10.11654/jaes.2025-0201
Sorptionselectivityofmetalcationsonamino grafted palygorskite
CHEN Xilin，GAO Xusheng，LIU Xiaomin，SHU Yifei，HUANG Qingqing， WANGLin，SUNYuebing，ZHAO Yujie，LIANG Xuefeng* （KeyLaboratoryofOriginalAgroEnviromentalPltionPreventionandControl，MnistryofAgricultureanduralAffasA）/ TianjinKeyLabratoryofgoEvirontandAgoroductfetyAgroEvioentProteonIsitute，，ji19 China）
Abstract：Toinvestigatetedsorptionselectivitycharacteristicsofminograftedpalygorskite（AG）forvariousmetalcatios，thisstudy conductedsingle-cationadsorptionkinetics，isotherms，ulti-cationcompetitiveadsorptionexperiments，andX-rayphotoelectron spectroscopy（XPS） analysis to examine the adsorption behavior of AGP towards eight metal cations（ Cd2+ ， Cu2+ Zn2+ Ni2+ Mn2+ ， Fe3+ ， Pb2+ Hg2+ ）.TheadsorptionprocessofvariousmetalcationsonAGPcanbedescribedbyapseudosecondorderadsorptionkineticsequationand Langmuir isotherm.The amino modification enhanced the adsorption of Pb2+ ， Zn2+ ，and Cd2+ by palygorskite，with the Pb2+ adsorption capacityincreasingsignificantlyby82.9%comparedtoteriginalpalygorskitendtheadsorptionprocesswasthermodyaialy spontaneous.Inthecompeitiveadsorptionofmixedsolutionsystemswithultiplecoexistingmetalcations，AGPexhibitedeficient selective adsorption ability for Pb2+ ， withF e3+ exhibiting the most significant inhibitory effect on Pb2+ adsorption， while the sorption of Fe3+ onAGPwas mainlythecontributionofpalgorskiteaterthanteaminomodificatio.XSanalysisinicatedthatteadsorptioofetal cationsnpalygorskitemainlyocurredthroughweakinteractionsofsufacehydroxylgroups，whiletheselectiveadsorptiomeanismof （204号 Pb2+ and Zn2+ on AGP was primarily through stronger amino complexation.The excellent selective adsorption performance of AGP for Pb2+ furtherenhancditspotentalapplicationinthseletivetreatmentofeavyetalplltioandprovidedtoreticalsupportforte development of targeted adsorbents and immobilization amendments for Pb2+ ：
Keywords：amino; palygorskite; sorption; selectivity
水体和土壤的重金属污染不仅会对生态环境造成严重威胁[1-2]，还可能通过食物链的生物富集效应危害人体健康，故需要持续采取相应管控措施。（剩余17502字）
