纳米零价铁活化高碘酸盐去除水解尿液中磺胺嘧啶的机制

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关键词：高碘酸盐；纳米零价铁；水解尿液；磺胺嘧啶；高价金属

中图分类号：X703 文献标志码：A 文章编号：1672-2043（2025）12-3222-08 doi：10.11654/jaes.2025-0080

Mechanistic onsulfadiazine removal from hydrolyzed urine by nano zero-valent iron activated periodate

ZHANGHaolong，FANGGuodong，DAI Jing，ZHAO Yuan

（1.ScholofEnviroentalienendEngineing，hangzouUniversityhangzou3164，ina;.IstituteofSlie Chinese Academy of Sciences，Nanjing 21Ooo8，China）

Abstract：Perodatebsedadvancedoidationprocees（P-AOPs）showedefcienteliminatoneficiencytowardsoganicpolutants.To exploreeffcietdegradationtechnologiesforantibioticpllutants，thisstudyinvestigatedetreatmentefciencandmechanismsof sulfadiazine（SDZ）degradationbynanoscalezerovalentiro（nZVI）activatedperiodate（P）oxidationprocesss.Theresultsdostate that nZVI/PI system achieved a faster SDZ removal rate（ 0.09h-1 ） compared with nZVI/PS system.The presence of HCO3 and NH4 in urine significantlyiibitedthegadatioofSDZ，hileCadangligiblefectActivespeiesidentficationexperimentsindcatedtat high-valent iron[Fe（IV）] and iodate radical（ ∇⋅[03 ）collectively drived the removal of SDZ from urine.Mass spectrometry indicates that SDZ decomposes through pathways such as pyrimidine ring opening，S—Nbond cleavage，C—Nbond cleavage，and molecular rearangement.Productanalysisrevealedthatmajordegradationproductsexhibitedsignificantlylowercologicaltoxicitycompaedtothe parent compound，demonstrating the environmental friendliness of nZVI/PI.

Keywords：periodate; nanoscale zero-valent iron; hydrolyzed urine; sulfadiazine; high-valent metal

抗生素在环境中广泛分布且对生态系统及人类健康构成严重威胁[1]。（剩余15859字）