摘要
针对废水中有机污染物光催化降解效率低,催化剂需分离,且易流失等问题,采用氨铁双滴法制备了具有异质结和巨大表面积的磁性纳米Fe_(3)O_(4)-TiO_(2)(nFT)复合光催化剂;针对光反应器传质效率低的问题,自制了间隙流磁场光反应器(MPR),构建了nFT-MPR光催化体系。当nFT投量1.5 g/L,流速110 mL/min时,处理初始浓度为50 mg/L的亚甲基蓝(MB)模拟废水,UV辐照60 min,nFT-MPR体系连续5次出水的MB平均去除率为99.2%。该体系操作简单,高效低耗,绿色稳定,无需分离光催化剂,为光催化技术应用在废水中有机污染物的降解中提供了新思路。
In view of the low photocatalytic degradation efficiency of organic pollutants in wastewater,the separating and losing of catalyst,a magnetic nano-Fe_3O_4-TiO_2(nFT) composite photocatalyst with heterojunction and large surface area was successfully prepared by the ammonia iron double drop method.In order to solve the problem of low mass transfer efficiency of the photoreactor,a gap flow magnetic field photoreactor(MPR) was established and the nFT-MPR photocatalytic system was constructed.When the dosage of nFT was 1.5 g/L and the flow rate was 110 mL/min,the simulated methylene blue(MB) wastewater with an initial concentration of 50 mg/L was treated.After 60 min of UV irradiation,the average removal rate of MB in the effluent of the nFT-MPR system for five consecutive times was 99.2%.The system is simple in operation,high in efficiency and low in consumption,green and stable,and does not need to separate photocatalysts.It provides a new idea for the application of photocatalysis technology in the degradation of organic pollutants in wastewater.
作者
张春辉
赵春霞
来俊达
刘晓欣
程苗苗
ZHANG Chunhui;ZHAO Chunxia;LAI Junda;LIU Xiaoxin;CHENG Miaomiao(National Experiment Demonstration Center of Chemistry Teaching(Hebei University),College of Chemistry and Environmental Sciences,School of Eco-Environment,Hebei University,Baoding 071002,Hebei,China;Hebei Key Laboratory of Close-to-Nature Restoration Technology of Wetlands,School of Eco-Environment,Hebei University,Baoding 071002,Hebei,China)
出处
《实验室研究与探索》
CAS
北大核心
2023年第5期32-36,共5页
Research and Exploration In Laboratory
基金
河北省自然科学基金项目(E2020201036)
河北省高等教育教学改革项目(2021GJJG006,2020GJJG515)
河北省第二批新工科项目(2020GJXGK003)
河北大学课程思政项目(KCSZ21097)。
