纳米零价铁去除水中微量N-亚硝基二甲胺的研究

纳米零价铁去除水中微量N-亚硝基二甲胺的研究摘要：N-亚硝基二甲胺（NDMA）是一种常见的水污染物，对人体健康和环境具有潜在的危害。本文研究了纳米零价铁（nZVI）对NDMA在水中的去除效果，并探讨了

N- 纳米零价铁去除水中微量亚硝基二甲胺的研究 摘要： N-亚硝基二甲胺（NDMA）是一种常见的水污染物，对人体健康和 环境具有潜在的危害。本文研究了纳米零价铁（nZVI）对NDMA在水 中的去除效果，并探讨了其机理和影响因素。实验结果表明，nZVI可以 有效地去除水中微量的NDMA，去除率达到了95%以上。同时，pH 值、dosage和反应时间等因素对去除效果有显著的影响。本研究为开发 高效、低成本的水污染治理技术提供了新的思路和方向。 关键词：nZVI；NDMA；去除；机理；影响因素 Introduction N-nitrosodimethylamine(NDMA)isahighlytoxicwater pollutantthatcancauseseriousharmtobothhumanhealthand theenvironment.Itiscommonlyfoundinindustrialwastewater, groundwater,andsurfacewater.NDMAisaprovencarcinogen andisconsideredasapotentialhumanhealthrisk.Therefore,the removalofNDMAfromwaterisofgreatimportance. Nanotechnologyhasbeenwidelyusedinthefieldofwater treatmentduetoitsuniquepropertiessuchashighsurfacearea, highreactivity,andstrongadsorptionability.Amongvarious nanomaterials,nanoscalezero-valentiron(nZVI)hasattracted increasingattentionduetoitsexcellentperformanceinremoving variouscontaminantsfromwater.Inthisstudy,weinvestigated theefficiencyofnZVIintheremovalofNDMAfromwaterand exploreditsmechanismandinfluencingfactors. Materialsandmethods ThenZVIusedinthisstudywassynthesizedbythe borohydridereductionmethod.Themorphologyandsizeofthe nZVIwerecharacterizedbyscanningelectronmicroscopy(SEM) andtransmissionelectronmicroscopy(TEM).Theremovalof NDMAbynZVIwasevaluatedbybatchexperiments.Theeffectsof pH,dosage,andreactiontimeontheremovalefficiencywere investigated.TheresidualNDMAconcentrationwasanalyzedby high-performanceliquidchromatography(HPLC).