摘要
通过一锅法制备了一种新型生物炭-铁基金属有机骨架复合材料(MIL-101(Fe)@BC)。利用傅里叶红外光谱、扫描电镜和氮气吸附-脱附分析对材料进行表征,探究了MIL-101(Fe)@BC对全氟辛酸(PFOA)的吸附效能和作用机制,并将其与5种常用工程碳材料进行对比。结果表明,MIL-101(Fe)@BC在吸附环境pH为4,吸附时间为1 h时达到最佳吸附效果,最佳投加量为0.05 g/L。MIL-101(Fe)@BC对PFOA的吸附等温线既符合Langmuir模型又符合Freundlich模型,最大饱和吸附量为925.93μmol/g,吸附过程符合准二级动力学方程,孔隙填充和氢键作用是吸附的主要机制。MIL-101(Fe)@BC吸附和再生效能均优于已广泛使用的工程碳材料,在新污染物治理领域具有较大的应用潜力。
A novel biochar-metal organic framework composite material(MIL-101(Fe)@BC)was prepared using the one-pot method.The material was characterized using Fourier-transform infrared spectroscopy,scanning electron microscopy,and nitrogen adsorption-desorption analysis.The adsorption efficiency and mechanism of MIL-101(Fe)@BC to perfluorooctanoic acid(PFOA)were investigated and compared with five commonly used engineering carbon materials.The results showed that MIL-101(Fe)@BC achieved optimal adsorption at pH 4,with an optimum dosage of 0.05 g/L within 1 h.The adsorption isotherm of PFOA on MIL-101(Fe)@BC followed both Langmuir and Freundlich models,with a maximum saturation adsorption capacity of 925.93μmol/g.The adsorption process followed pseudo-second-order kinetics,and pore filling and hydrogen bonding were identified as the main adsorption mechanisms of MIL-101(Fe)@BC to PFOA.MIL-101(Fe)@BC exhibited superior adsorption and regeneration efficiency compared to widely used engineering carbon materials,indicating significant practical application potential.
作者
周瑶璐
祝绍玉
刘树仁
钱一帆
柏珊珊
ZHOU Yaolu;ZHU Shaoyu;LIU Shuren;QIAN Yifan;BAI Shanshan(Zhejiang Provincial Key Laboratory of Pollution Exposure and Health Intervention,Interdisciplinary Research Academy,Zhejiang Shuren University,Hangzhou 310015,China;College of Biology and Environmental Engineering,Zhejiang Shuren University,Hangzhou 310015,China)
出处
《分析试验室》
EI
CAS
CSCD
北大核心
2024年第5期699-704,共6页
Chinese Journal of Analysis Laboratory
基金
浙江省教育厅一般科研项目(Y202351795)
浙江树人学院省属高校基本科研业务费专项资金项目(2023XZ004)
浙江树人学院引进人才科研启动项目(2121R018)资助。
关键词
生物炭
复合材料
吸附
全氟辛酸
biochar
composite materials
adsorption
perfluorooctanoic acid
