摘要
通过合成Fe-MOF衍生的零价铁/碳复合材料(ZVI/C),使其活化过二硫酸盐(PDS),以降解水环境中的氟苯尼考(FF)。经过扫描电镜(SEM)、X射线衍射光谱(XRD)、红外(FTIR)和X射线光电子能谱(XPS)等一系列表征,表明ZVI/C被成功制备。在不同pH值、ZVI/C投加量、PDS投加量以及FF浓度的条件下探究ZVI/C活化PDS对FF的去除性能,结果表明,初始溶液pH值为5.0、ZVI/C剂量为10 mg、PDS为1 mmol/L,FF初始浓度为20 mg/L为最佳反应条件,可以使得FF的降解率达到92%。自由基猝灭实验表明,在ZVI/C活化PDS降解FF体系中,·OH和·SO_(4)^(-)是主要的活性物质。不同时间段的氟、氯变化趋势证明,FF的降解过程伴随着脱氟、脱氯的进行。对于不同的实际水体,ZVI/C也表现出不凡的FF去除效果。最后,本文揭示ZVI/C可能是活化PDS去除水体中FF的高效催化剂。
In this study,zero-valent iron/carbon composite(ZVI/C)derived from Fe-MOF was synthesized to activate peroxydisulfate(PDS)for the degradation of florfenicol in water environment.Successful preparation of ZVI/C was confirmed through a series of characterization techniques,including scanning electron microscopy(SEM),X-ray diffraction(XRD),Fourier transform infrared spectroscopy(FTIR),and X-ray photoelectron spectroscopy(XPS).The FF removal performance by PDS activated with ZVI/C was investigated under various conditions,including different pH values,PDS dosages,material dosages,and FF concentrations.The results indicated that the optimal reaction conditions were as follows:an initial solution pH of 5.0,a ZVI/C dosage of 10 mg,and a PDS concentration of 1 mmol/L,an initial FF concentration of 20 mg/L,achieving a FF degradation rate of 92%.Radical quenching experiments demonstrated that·OH and·SO_(4)^(-)were the primary reactive species in the ZVI/C activated PDS system for FF degradation.The changing trends of fluorine and chlorine at different time intervals evidenced the occurrence of both defluorination and dechlorination during the FF degradation process.Furthermore,ZVI/C exhibited remarkable FF removal efficiency in different real water matrices.Finally,this study revealed that ZVI/C was a highly efficient catalyst for PDS activation in removing FF from water bodies.
作者
王顺
王志国
张纯
王琼超
黄卫
喻鹏
WANG Shun;WANG Zhiguo;ZHANG Chun;WANG Qiongchao;HUANG Wei;YU Peng(College of Chemistry and Materials Science,Hunan Agricultural University,Changsha 410128,China)
出处
《晓庄学院自然科学学报》
北大核心
2025年第4期142-150,共9页
Journal of Natural Science of Hunan Normal University
基金
江西省井冈山农高区省级科技专项课题(20222-051245-04)
湖南农业大学学科交叉研究青年引导项目(2024XKJC03)。
关键词
氟苯尼考
ZVI/C
抗生素
PDS
降解机理
florfenicol
zero-valent iron/carbon composites
antibiotics
peroxydisulfate
degradation mechanism
