Bio-FeMnCeOx活化PMS降解四环素效能与机制
Efficiency and mechanism of Bio-FeMnCeOx activated PMS for degradation of tetracycline
刘梦凡 1王华伟 1王亚楠 1张艳茹 1蒋旭彤 1孙英杰1
作者信息
- 1. 青岛理工大学环境与市政工程学院,青岛 266520
- 折叠
摘要
鉴于生物合成材料在水环境修复中成本低、环境友好、高效等优势,制备了Ce掺杂生物铁锰氧化物(Bio-FeMnCeOx),以盐酸四环素(TC)为目标污染物,研究了Bio-FeMnCeOx制备参数(Ce剂量、培养时间及样品处理方式等)和工艺条件(pH、PMS浓度、Bio-FeMnCeOx剂量等)对Bio-FeMnCeOx活化PMS降解TC的影响.通过自由基猝灭实验和电子顺磁共振(EPR)分析TC降解的主要活性氧物质种类和贡献率,推测了TC的降解路径和降解机制,验证了Bio-FeMnCeOx的循环稳定性.结果表明:①通过生物合成法成功制备了Bio-FeMnCeOx,将其用于活化PMS降解TC具有良好的催化活性,在pH为11.0、PMS浓度200mg/L、Bio-FeMnCeOx剂量为100mg/L、反应时间为60min时,TC的降解效率可达93.75%;②通过自由基猝灭和EPR鉴定的实验发现,Bio-FeMnCeOx/PMS体系主要的活性物质为·SO-4和1O2;③Bio-FeMnCeOx具有良好的实验稳定性,重复使用8次后,TC的降解效率仍高达75.71%.该研究的发现为抗生素废水治理提供了新的催化技术路线.
Abstract
In view of the low cost,environmentally friendly and high efficiency of biosynthetic materials in water environmental remediation,Ce-doped biogenic Fe/Mn oxides(Bio-FeMnCeOx)was prepared to degrade tetracycline hydrochloride(TC).The effects of preparation parameters(Ce dosage,cultivation time and polishing methods,i.e.)and procedure parameters(pH,PMS concentration,and Bio-FeMnCeOx dosage,i.e.)of Bio-FeMnCeOx on the degradation of TC by Bio-FeMnCeOx activated PMS were explored.The main species and contribution of reactive oxygen of TC degradation were analyzed by free radical quenching experiments and electron paramagnetic resonance(EPR).The degradation pathway and mechanism of TC was confirmed and the cyclic stability of Bio-FeMnCeOx were verified.The research results indicated that Bio-FeMnCeOx was successfully prepared by biosynthesis,and it was used to activate PMS to degrade TC with good catalytic activity,and the degradation efficiency of TC could reach 93.75%.pH of 11.0,PMS concentration of 200mg/L,Bio-FeMnCeOx dose of 100mg/L when the reaction time were 60min.The results of free radical quenching and EPR identification experiments indicated that the main active species in this system were·SO-4 and 1O2.The cyclic stability experiment showed that Bio-FeMnCeOx had good stability.The degradation efficiency of TC was still as high as 75.71%after 8 times repetition.The results of this study provide a new technology for antibiotic wastewater treatment.
关键词
复合材料/废水/四环素/降解/自由基Key words
composites/waste water/tetracycline/degradation/radical引用本文复制引用
基金项目
国家自然科学基金(52370173)
国家自然科学基金(41907111)
东营市科技计划(2022ZD20)
出版年
2024
国家科技期刊平台
NSTL
万方数据