蒙脱石和赤铁矿对老化生物炭衍生溶解性有机质的优先吸附机制

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中图分类号：X14 文献标志码：A 文章编号：1672-2043（2025）06-1563-08 doi：10.11654/jaes.2024-0653

Preferential adsorption mechanism of montmoriloniteand hematite onaging biochar-derived dissolved organicmatter

NING Yongxing1，ZHOUJiahao1，LIUKai²，LIUGaoyuan²，DUANXizhaol，GUOJiawen²，LIFangfang1*

（1.CollgeofEnvironmental ScienceandEnginering，Kunming Universityof Scienceand TechnologyKunming 65050o，China; 2.Sugarcane Research Institute， Yunnan Academy of Agricultural Sciences，Honghe ， China）

Abstract：Inordertostudythepreferentialadsorptionmechanismof mineralsonbiocharderiveddisolvedorganicmater（BDOM/ ABDOM） before and after aging， Aging biochar was prepared from corn straw biochar by 30% hydrogen peroxide treatment.，The program adsorptionexperimentswerecarriedoutusingquartzsand（controlgroup），montmoriloniteandhematitewithBDOM/ABDOM.Theesults showedthatduetothedecreaseoflectrostaticrepulsionbetweenABDOMandminerals，theagingofbocharincreasedtheadsoptionof BDOMbyquartsaniletmotmorilite/matiteditionroupasteopposite.Teteinralsaveteghsoto effciencyforBDOfortefisti.Teoderoffationefciecyofinral-assocatedoanicater（O）isotmile> hemtite>quartzsand.TheformationeficiencyofMAOMdependedmainlyonthepropertiesofthemineralstemselves.Montmorilloite hasahigheradsorptionofBDOMmainlybecauseofthelargerspecificsurfacearea.Providingmoreadsorptionsitesandmoresignificant cationbridging.Hematitehaspreferentialsorptionfortyrosine/tryptophanproteinsandfulvicacidcomponents inBDOMthroughligand exchange.ForABDOM，montmorillonite and hematite preferentiallyadsorb fulvic acid and humic acid components.

Keywords ： biochar; mineral; adsorption; dissolved organic matter; aging

生物炭是由生物质在完全或部分缺氧的状态下热解（通常 <700∘C ）产生一类含碳量较高且高度芳香化固态物质[1-2]。（剩余17577字）