MOF衍生物(Fe/NC)活化过硫酸盐对土霉素的高效降解
Efficient degradation of oxytetracycline by persulfate activated by MOF derivative(Fe/NC)
牛曦若 1张怡菲 1徐靖涵 2胡斌3
作者信息
- 1. 北京工业大学城市建设学部,北京,100124
- 2. 厦门大学化学化工学院,厦门,361005
- 3. 安泰环境工程技术有限公司,北京,100094
- 折叠
摘要
近年来,以有机金属骨架(MOF)为前驱体制备的MOF衍生物得到越来越多的关注.与MOF相比,热解制得的MOF衍生物具有多变的结构、更高的比表面积和更好的稳定性.本研究采用高温碳化MOF成功制备了 Fe/NC材料,研究了不同因素对Fe/NC活化PS降解土霉素(OTC)的影响.在OTC初始浓度为20mg·L-1、PS浓度为3 mmol·L-1、Fe/NC-900投加量为0.2 g·L-1、初始pH值为6.0的条件下,反应20min后,OTC去除率最高达到89.18％.活性氧物质淬灭实验证实反应体系中存在硫酸根自由基(SO4·-)、羟基自由基(·OH)等多种活性氧物质,其中SO4·-在OTC的降解中起主要作用.在最优催化工艺参数下探究不同水基质对OTC去除的影响.其中Cl-和腐殖酸对OTC的降解几乎没有影响,HCO3-和H2PO4-则表现出轻微的抑制作用,说明Fe/NC的适用范围广,经过五次循环回用后对OTC的降解率仅下降16.85％,表明材料具有较好的重复利用性.本研究为MOF材料在水污染控制领域中的应用提供了新的理论研究,并为四环素类抗生素的降解提供了新思路.
Abstract
In recent years,organometallic skeleton(MOF)derivatives prepared using MOF as precursors have received increasing attention.Compared with MOF,the MOF derivatives produced by pyrolysis have variable structure,higher specific surface area and better stability.In this research,Fe/NC materials were successfully prepared by high temperature carbonization of MOF.The removal efficiency of OTC could reach 89.18％with 20 mg·L-1 initial concentration of OTC,3 mmol·L-1 PS and 0.2 g·L-1 Fe/NC-900 at 6.0 pH in 20 min.The results of reactive oxygen species quenching experiments confirmed the presence of various reactive oxygen species,among which SO4·-played a primary role in the degradation of OTC.The effects of different water matrix showed that Cl-and humic acid had almost no effect on OTC degradation,while HCO3-and H2PO4-expressed a slight inhibition.After five cycles of recycling,the degradation rate of OTC only declined by 16.85％.This research suggests a new theoretical basis for the application of MOF materials in the field of water contamination control and provides a novel concept for the degradation of tetracycline antibiotics.
关键词
过硫酸盐/MOF衍生物/土霉素/高级氧化/非均相催化剂Key words
persulfate/MOF derivative/oxytetracycline/advanced oxidation/heterogeneous catalyst引用本文复制引用
出版年
2024
NETL
NSTL
万方数据