MIL-88B/蒙脱土改性棉纤维素复合气凝胶及其吸附-降解协同去除染料和抗生素  

MIL-88B/montmorillonite modified cotton cellulose composite aerogel for synergistic removal of dyes and antibiotics by adsorption and degradation process

作　　者：姚安荣 王亚芳 陈方春 王凯[1] 林绍建[1] 兰建武[1] Yao Anrong;Wang Yafang;Chen Fangchun;Wang Kai;Lin Shaojian;Lan Jianwu(College of Biomass Science and Engineering,Sichuan University,Chengdu 610065,Sichuan,China)

机构地区：[1]四川大学轻工科学与工程学院,四川成都610065

出　　处：《产业用纺织品》2024年第2期34-47,共14页Technical Textiles

基　　金：国家自然科学基金(52003171)。

摘　　要：将MIL-88B修饰的蒙脱土(MIL-88B/MMT)引入棉纤维素气凝胶基体中,制备多功能棉纤维素复合气凝胶(MMCCA),通过吸附-降解协同作用,用其有效去除废水中的染料和抗生素。探讨不同pH值、离子强度、染料初始浓度和接触时间下MMCCA对染料和抗生素的吸附性能,分析有过氧化氢(H2O2)条件下,MMCCA对染料和抗生素的降解性能。结果表明:MMCCA对甲基橙(MO)、亚甲基蓝(MEB)和盐酸四环素(TCH)的最大吸附量分别为138.03、655.66和503.55 mg/g;采用Langmuir吸附等温线模型、Freundlich吸附等温线模型和伪二级动力学模型能够较好地描述MMCCA的吸附过程;H2O2的加入使MMCCA对MO、MEB和TCH的去除率分别由64.97%、69.31%和25.31%显著提高到96.23%、98.61%和86.46%;该MMCCA具有良好的重复使用性。MIL-88B modified montmorillonite(MIL-88B/MMT)was introduced into cotton cellulose-based aerogel matrix to prepare multifunctional cotton cellulose composite aerogel(MMCCA),which could effectively remove dyes and antibiotics from wastewater through the synergistic effect of adsorption and degradation.The adsorption performance of MMCCA towards dyes and antibiotics was systematically investigated under different pH values,ionic strength,initial dye concentrations and contact time.Furthermore,the degradation performance of MMCCA towards dyes and antibiotics in the presence of hydrogen peroxide(H2O2)was discussed.The results showed that the maximum adsorption capacities of MMCCA for methyl orange(MO),methylene blue(MEB)and tetracycline hydrochloride(TCH)were 138.03,655.66 and 503.55 mg/g,respectively.The adsorption process of MMCCA was well described by the Langmuir isotherm model,Freundlich isotherm model and pseudo-second-order kinetic model.The addition of H2O2 significantly improved the removal rates of MO,MEB and TCH by the MMCCA from 64.97%,69.31%and 25.31%to 96.23%,98.61%and 86.46%,respectively.Additionally,the MMCCA exhibited excellent recyclability.

关 键 词：棉纤维素复合气凝胶 MIL-88B/蒙脱土 染料 抗生素 吸附 FENTON降解 

分 类 号：TS199[轻工技术与工程—纺织化学与染整工程]