苹果酸改性生物炭对水体中莠去津的吸附性能

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中图分类号：X592；TQ424 文献标志码：A 文章编号：1672-2043（2025）11-2981-13 doi：10.11654/jaes.2025-0091

Abstract：Inodertoinvestigatethestructuralcharacteristicsandadsorptionpropertiesofmalicacid-modifdbiochar，andtodeeply understanditsdsoptiomechanism，dtoprovideafasibleetodfortedoptioofsidualtraineintequeouseiot， four types of tea stems were prepared at 400， 500， 600 C and 700 C （TBC-400， TBC-500， TBC-600 and TBC-700），and TBC-700 with the best adsorption performance was screened out，and the modified biochars MTBC- -1 ，MTBC-2 and MTBC-3 were obtained by malic acid gradientmodification.Scaning electronmicroscopy（SEM），specificsurfaceareaanalysis（SSA）andFouriertransformifrared （FTIR）spectroscopywereusedtocharacterisethestructureoftheoriginalandmalicacid-modifedbiochars，andbatchadsorption experimentswerecariedoutvestigatetedsorptioncharacteristsoftemodifidicharsonatraieinthwateodyesults showedatthespecificsurfaceareaofthemodifiedbiocharincreasedsignificantlyMTBC-1increasedby1.7-foldcomparedwithBC700），the ash content decreased by 57.97% -72.75%，the proportion of micropores increased，and the number of polar groups on the surface increased，adtdoptioprossfodtoothalodelofgirchasothcactio adsorption of atrazine by MTBC-1 reached 24.95mg⋅g-1 ，which was95.84% higher than thatof unmodified biochar，After five regeneration cycles， it retains 95.54% of its initial adsorption eficiency.The modification of malicacid reduced the aromaticityof the biochar surface andincreasedthepolaritycomparedwiththeoriginalbiochar.Theincreaseinspecificsurfacearea，thecompletedevelopmentofpore structurencreasedandtenumberofpolarfunctionalgroupsonthesurfaceoftebiochar，hichenabledittoadsorbmoreatrazie.The adsorption mechanisms include hydrogen bonding， π-π electron donor-acceptor interaction and electrostatic attraction.

Keywords：malic acid modification;atrazine;biochar;adsorption properties

莠去津是一种应用广泛的三嗪类除草剂，自1958年问世以来，因高效、低毒和低成本而成为全球消费量第二高的农药，每年消耗量在7～9t。（剩余18667字）