沸石改性生物炭对重金属Pb（Ⅱ）的吸附性能及其机理

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中图分类号：X703 文献标志码：A 文章编号：1672-2043（2025）12-3230-11 doi：10.11654/jaes.2024-0802

Modified zeolite biochar for the adsorption performance and mechanism of heavy metal Pb（II）

LI Junjie'，WANGYuying，HUANGJiaqi，CHENGKai，LUHaohao，HE Lili，YUJuan （1.BeijingIsitefcholuiui98a;siuteiotsoue，SildrtilZej Academyof Agricultural Sciences，Hangzhou 31O1，China;3.ColegeofResourceandEnvironment，Anhui ScienceandTechology University，Chuzhou311300，China）

Abstract：ToinvestigatedtheremediationperformanceandmechanismsoflieodifiedbiocharcompositesforPb（I）ontanated watertreatment.Zeolite-biocharcomposites withdiferentmassratios weresynthesizedviaone-stepco-pyrolysisusingricehusk athe biomassprecursor.Comprehensivecharacterzationwasconductedemplingbruauermmet-teler（BET）analysis，scaningelectron microscopywitheergydispersivespectroscoy（SE-EDS），X-raydifraction（XRD），X-rayphotoelectronspectrosopynd Fourier-transfoinfraredspectroscopy（FTR）.Theadsorptionbehaviorwasevaluatedundervaryingenvironmentalconditionscluding solution pH（2.0-6.O），contact time（O-24 h），initial Pb（II） concentrations（ 10-80mg⋅L-1） ，and ionic strength（ 0-0.5mol⋅L-1 NaCl）. ExperimentalrsultsmostratedsucesfulompositfationwitotialP（II）rmolecybsedatpH6.tial parameters were identified as 12-24 h contact time and 25-65mg⋅L-1 initial Pb（II） concentration. Adsorption kinetics for BC， ZR1：1， ZR1：2，andZR2：1compositesfollowedpseudosecondordermodels，hiletheFreundlichisothermmodelbestdescribedtheultilaer adsorptionprocessNotablyNaCloncentrationexhibiedabiphasicectonPb（I）removalfficiencyshowingcomparable

performance at O and 0.001mol⋅L-1 ，followed by a characteristic decrease-increase pattern with increasing ionic strength.The 1：2 zeolitebiocharcompositedemonstratedsuperioradsorptioncapacitycomparedtounmodifiedbiochar.Thisresearchprovidesanotimizedstrategy forPb（II）contamination remediation.

Keywords： zeolite; biochar; Pb（ II ）; adsorption; one-step co-pyrolysis

Pb（ⅡI）在环境中的大量积累会对生态环境构成威胁，且其可通过食物链等累积危害人体健康。（剩余19677字）