天然矿物纤维水镁石活化过一硫酸盐降解亚甲基蓝  

Degradation of methylene blue by activated peroxymonosulfate by natural mineral fibrous brucite

作　　者：张拔群 罗仙平 唐学昆[1,2,3] 吴尧尧 余嗣昊[1,2,3] 熊瑜婷 ZHANG Baqun;LUO Xianping;TANG Xuekun;WU Yaoyao;YU Sihao;XIONG Yuting(Jiangxi Provincial Key Laboratory of Environmental Pollution Prevention and Control in Mining and Metal-lurgy,Ganzhou 341000,China;School of Resources and Environmental Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,China;Yichun Lithium Electric New Energy Industry Research Institute,Jiangxi University of Science and Technology,Yichun 336000,China)

机构地区：[1]矿冶环境污染防控江西省重点实验室,江西赣州341000 [2]江西理工大学资源与环境工程学院,江西赣州341000 [3]宜春江理锂电新能源产业研究院,江西宜春336000

出　　处：《工业水处理》2025年第2期85-95,共11页Industrial Water Treatment

基　　金：江西省教育厅科学技术研究项目(GJJ2200823);江西理工大学博士科研启动基金项目(204201400910)。

摘　　要：以天然矿物纤维水镁石作为催化材料用于活化过一硫酸盐(PMS)降解亚甲基蓝(MB)。通过XRD、FT-IR、SEM和XPS等表征手段对纤维水镁石结构进行表征和分析,结果表明纤维水镁石的纳米纤维结构表面富含羟基和氧空位。探究了催化剂投加量、PMS浓度、溶液初始pH和反应温度对MB降解率的影响,结果表明,在MB初始质量浓度为10 mg/L,溶液初始pH为5.6,温度为30℃,纤维水镁石投加量为1.0 g/L,PMS浓度为1.0 mmol/L时,MB降解率在反应进行18 min时达到98.5%。纤维水镁石/PMS体系可在较宽的pH范围(3~11)内降解MB,且在5次循环利用后,MB降解率仍可达到83.4%,具有良好的可重复利用性和稳定性。该体系对染料、选矿药剂、抗生素类、酚类等物质去除均有较强的适用性。自由基猝灭实验与电子顺磁共振(EPR)结果表明,纤维水镁石/PMS体系中的活性物种主要为^(1)O_(2)和SO_(4)^(•-)。Activated peroxymonosulfate(PMS)using natural mineral fibrous brucite as a catalytic material was em-ployed for the degradation of methylene blue(MB).XRD,FT-IR,SEM and XPS were used to characterize and ana-lyze the structure of fibrous brucite,it was proven that the surface of fibrous brucite nanofiber structure was rich in hydroxyl and oxygen vacancies.The effects of the dosage of catalyst,PMS concentration,initial pH and reaction tem-perature on the degradation rate of MB were investigated.The results showed that the degradation rate of MB reached 98.5%in 18 minutes when the initial concentration of MB was 10 mg/L,the initial pH of the solution was 5.6,the temperature was 30℃,the dosage of fibrous brucite was 1.0 g/L,and the concentration of PMS was 1.0 mmol/L.The fibrous brucite/PMS system could degrade MB within a wide pH range(3-11).The degradation rate of MB could still reach 83.4%after 5 cycles,indicating good reusability and stability.The system had strong applica-bility for the removal of dyes,mineral processing reagents,antibiotics and phenols.The results of free radical quenching experiment and electron paramagnetic resonance(EPR)showed that the active species in the fibrous bru‐cite/PMS system were mainly ^(1)O_(2) and SO_(4)^(•-)

关 键 词：天然矿物 纤维水镁石 过一硫酸盐 亚甲基蓝 

分 类 号：X703.1[环境科学与工程—环境工程] TQ426[化学工程]