Zn-Fe共活化磁性生物炭吸附四环素与重金属铬的性能比较与机理分析

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中图分类号：TQ424；X703 文献标志码：A 文章编号：1672-2043（2025）08-2201-10 doi：10.11654/jaes.2024-0697

Comparison of adsorption performance and mechanism analysisof Zn⋅ -Feco-activated magneticbiochar for tetracyclineandchromium

ZHAO Chuanqi， GONG Sinuo， CHEN Yuxuan，TAN Wen， WEN Lichun， XUAN Yongxi，PAN Honghui，SHI Qin* （Guangxi KeyLaboratoryofdvancedStructuralMaterialsandCarbonNeutralization，GuangxiCollgesandUniversitiesKeyLboratory ofEnvironmental-friendlyaterialsandEcologicalRemediation，ShoolofMaterialsandEnvironment，GuangxiMinzuUiversity Nanning 530006， China）

Abstract：Inresponsetothewidespreadproblemsofantibioticandheavymetalpolutioninwaterbodies，thisstudyusedsugarcane bagassearawmaterialandFeClandZnClasactivators topreparemagneticbiocharmaterialswithhighadsorptionperfoance.By studying the influence of different factors，the adsorption performance of the material for tetracycline（TC）and Cr（W） pollutants was explored，anditsadsorptionmechanismwasanalyzed.Theresultsshowedthatmagneticbiocharhasaporousintealstructurewitha specificsurfacearea ofup to 913.81 m2⋅g-1 ; Ithassuccessfullyloaded F e3O4 onitssurface and isrich in oxygen-containing functional groups such as—OH and —COOH. The adsorption of TC by magnetic biochar mainly relies on π-π conjugation，Van Der Waalsforces， andhydrogendngforcs，hiletdsoptionofCrV）isainletedbylectrostaticductiondoplexatiots fitting results of the adsorption kinetics model indicate that the adsorption process of TC and Cr（W） by the composite material is more inlinewiththequasisecondoderineticsmodelindicatingthattheadsorptionprocessisontrolledbychemicalractiose adsorptioisotherodelanalsissowsthatthadsorptionprocessofTCbymagneticbiocharisoreinlinwiththeLangmurisoth model，indicatingthatTCexistsiasingle-layeradsorptioformonthesufaceofmagneticbiochar;Theadsorptionprocesof Cr（W） is more in line with the Freundlich isotherm model，indicating that Cr（W） exists in a multi-layer adsorption form on the surface of magnetic biocharIditiofterpeatedus，teompositeaterialcaillintaighdsopfoance.Tsicattsing activationmethodtopreparemagneticbchrompositematerialsisanefectivemeanstreduceenvironmentalpolutionandachievethe resource utilization of agricultural waste.

Keywords：magnetic biochar;bagasse; tetracycline; Cr（M） ; adsorption

目前，农业废弃物制备的磁性生物炭已成功应用于重金属和有机污染物的吸附去除，并取得了良好的吸附效果。（剩余15629字）