PBAT微塑料海水环境中紫外老化特性及其对重金属的吸附影响

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中图分类号：X55 文献标志码：A 文章编号：1672-2043（2025）09-2374-12 doi：10.11654/jaes.2024-0808

Abstract：Inodertoexploreteultraviletdiatioagingcaracteristcsofodegdbleicroplasticsiseawateranditsecton adsorptionofeavymetalsuderthetropicalislandenvironmentwithstrongultravioletradiation，tissudyonductedindorxprts undersimulatedhydrothermalconditionsandultravioletglarefor3Odaysand9Odays，thephysicalandchemicalcharacteristicsof microplasticssuchasolybutyleneadipatecotrephhalate）（PBA）werecomparedtoexploretheefectsofagingdegr，tperature， pHandotherenviromentalchangesonadsorptioofCu（II）andPb（II）.Teresultssowedthatthecrystalinityandcrackingdgreof microplasticsPBATincreasedwiththeextensionofUVagingduratio;Theincreaseofadsorptiontie，temperatureandpHcouldeance the adsorption capacity of Cu（II）and Pb（II），and the adsorption capacity ofPb（II）were greater than thatof Cu（I） ，and the adsorption tended to be stable after the adsorption time reaches 300min . The adsorption kinetics fitting showed that the original and PBAT microplasticsaged3OdaysweremoreconsistentwithElovichmodel，hilethePBATmicroplasticsaged90daysweremorecosistentwith PSO model.Theadsorption isothermcouldbe fitedwellwith theFreundlichmodel.Studies haveshown thattheadsorptionof Cu（I） and Pb（I）bymicroplasticsPBATwasrelatedtosurfaceelectrostaticdsoption，oncreaction，acid-baseefect，etc，andblongedta multi-phase and multi-stage process.UV aging increased the saturation adsorption capacity of Cu（II） and Pb（II ）on microplastics PBAT.

Keywords：microplastics; PBAT; ultraviolet aging; adsorption; Cu（II）; Pb（II ）

塑料具有密度低、性质稳定、耐腐蚀等优良特点，是重要的有机合成高分子材料，广泛应用于各个民生领域，给人类的生产和生活带来了极大的便利。（剩余27671字）