非金属材料对水-沉积物中镉的阻隔机制

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中图分类号：TQ424；X52 文献标志码：A 文章编号：1672-2043（2025）07-1825-11

doi：10.11654/jaes.2024-0797

Stabilization mechanism of non-metallic materials on cadmium in water-sediment environment

YANGDaizong1²，YINCailiu¹，YUHui²，LI Xixi²，ZANGLongfei²，LUOMingke2* （1.GuangxiCollgesandUniversitiesKeyLaboratoryofEnvironmental-friendlyMaterialsandEcologicalRestorationGuagxiKey LaboratoryofdvancedStructuralMaterialsandCarbnNeutraation，ScholofMaterialsandEnviroent，GuangxiMinzuUivesity Nanning 530105，China; 2.Chinese Research Academy of Environmental Sciences，Beijing 10012，China）

Abstract：InordertoivestiatetedifereceoftcalmetalicateralsaolinKL）ctiatedcrbo（AC）ndr）o thestabilizaonofCdinwatersedimentTisarticlestudedtefetsoftreematerialsontepysicoeicalfators（pHO）， nutrients[talaicabo（O）otalospos）otalroenddtratiflgicaltiii systemof“overlyingwatenterstitialwatersediment".Theresultssowedthattematerialsallnhancedtheoxidatioofteoerlying wateranddepressdTOCandCd（II）concentrationsintheaqueousphase，withACcausingthegreatestdegreeofnutrientdepositionand releasefromthesystem.Speamancoelationanalysisprovedthatthspeficsufaceareaandtotalprevoueofthematealwere negativelyoelateditpdOCheToncetraonieintestitialwateassupsigiantlposiielyoeladithCd biologicaltoxicityirstlymetallcmaterialshangedierentphysicocemicalfctors（suchasH，）atesedtater interface，indirelyducteigrationofCdI）econlyteateralsretlydsobtsablempoentsofCdineling water，trasforingitintooresableoidzablesate.Amogt，C，uetitsqeracteistic，romoestetrafotioof reducible state Cd with P to more stable Cd1.25Ca0.75（P2O7） ）crystals.Furthermore，it enhances the residue state of Cd in the sediments by 12 percentagepoints，ichasthstpasivaincts.Insmary，thdsoptonpasvatiadstabilitofCdderive>C>K AC has the greatest effect on physicochemical characteristics in the water-sediment environment.

Keywords：non-metallic materials; biochar; lake sediments;cadmium; phosphorus

镉（Cd）是生物非必需元素，为第一类致癌物，其主要来源于自然侵蚀、矿业开采和农业施肥等自然-人为活动。（剩余21985字）