不同粒径棉秆生物炭对聚乙烯微塑料污染土壤水分与溶质运移特性的影响

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关键词：聚乙烯微塑料；棉秆生物炭；土壤水分入渗；溶质运移；孔隙结构中图分类号：X53 文献标志码：A 文章编号：1672-2043（2025）11-2946-10 doi：10.11654/jaes.2024-1046

Abstract：Tvestigate teemediationctsofocaroroplasticontaminatedsoil，tissuyutildasoilupt to ssessheipactsofcotonstalkbiocarwithvaryingparticlesizes（O.15mmandO.5-1mm）ontheifiltrationandsolutetrasprt characteristicsofsoilcontaminatedwithpolyethlene（PE）microplastics.Themorphologicalcharacteristicsandporestructursofthe diferent treatmentgroups werecharacterizedusing scaning electronmicroscopy（SEM）andBrunauer-Emmett-Teller（BET）analysis. TheinfiltrationandsolutetransportpaterswereevaluatedusingthePilipmodelandtheconvection-dispersionquation.Teresults demonstrated that PE contamination reduced the initial infiltration rate of the soil by 32.98% （to 0.65cm⋅min-1 ）and increased the saturated hydraulic conductivity by 114.3% （to 0.45cm* ），therebysignificantly altering the soil'shydrological properties.The addition of biocharimprovedthesoil structure，withtheO.15-1mmparticlesizegroupexhibitingamorestableporestructureandahigher micropore volume （0.001814cm3⋅g-1） compared to the <0.15 mm particle size group（0.0oo 957 cm 3⋅g-1 ）.In PE-contaminated soils， the incorporation of O.15-1 mm biochar decreased the initial infiltration rate to 1.15cm⋅min-1 and reduced the saturated hydraulic conductivityto 0.06cm⋅h-1 ，whileextending theinitial solute breakthrough time to58O minutes.These findings indicate thatbiochar particleswithinteO.5-msizerangeefecielyeanceaterandsoutetrasortcharacteristicsinE-cotaminatedolstough the development of stable pore networks.

Keywords：polyethylene microplastics; cottonstalk biochar;soil water infiltration;solute transport; pore structure

土壤微塑料污染已成为一个重要的环境问题，可能威胁土壤健康、生态系统功能和水资源安全-3]。（剩余21451字）