Mn/ZIF-90对水中重金属离子的吸附性能研究  

Research on adsorption properties of Mn/ZIF-90 for heavy metal ions in water

作　　者：韩臻 谭文渊 黄泽华 陈建书 刘佳明 刘鑫 叶江 HAN Zhen;TAN Wenyuan;HUANG Zehua;CHEN Jianshu;LIU Jiaming;LIU Xin;YE Jiang(Zigong Service Center for Rural Revitalization and Development,Zigong 643000,China;School of Chemical Engineering,Sichuan University of Science and Engineering,Zigong 643000,China;Beijing SPC Environment Protection Tech Co.,Ltd.,Beijing 100083,China)

机构地区：[1]自贡乡村振兴发展服务中心,四川自贡643000 [2]四川轻化工大学化学与工程学院,四川自贡643000 [3]北京清新环境技术股份有限公司,北京100083

出　　处：《应用化工》2025年第1期137-142,146,共7页Applied Chemical Industry

基　　金：工业危废协同处置医疗废物及其热能利用研究与应用示范(2023AB032);自贡市农产品“三品一标”发展路径研究(2022Y02)。

摘　　要：以乙酸锰、乙酸锌、咪唑-2-甲醛等原料合成锰掺杂的改性金属骨架结构材料Mn/ZIF-90,将该材料应用于Cu、Pb、Cd、Cr、Ni和As离子的吸附,通过调控水的pH值测试Mn/ZIF-90的吸附性能,并以Cu、Cd和Cr元素为例,对材料的吸附结果进行拟合,探讨材料的吸附机理。结果表明,20 mg改性后的Mn/ZIF-90材料对pH为6.5~8.0、离子浓度为0.02 mg/L的50 mL农业用水中的上述6种离子可做到10 min内吸附率100%的完全去除,同时不存在Mn元素泄露的现象。经Langmuir、Freundlich、Temkin、D-R(Dubinin-Radushkevich)和Scatchard模型拟合可知,材料对各离子的吸附主要以物理吸附为主,同时存在化学吸附。Mn-Doped modified metal-organic framework material Mn/ZIF-90 was synthesized using manganese acetate,zinc acetate,and imidazole-2-aldehyde as raw materials.This material was applied to the adsorption of Cu,Pb,Cd,Cr,Ni,and As ions.The adsorption performance of Mn/ZIF-90 was tested by adjusting the pH value of water.Taking Cu,Cd,and Cr elements as examples,the adsorption results were fitted,and the adsorption mechanism of the material was discussed.The results show that 20 mg of the modified Mn/ZIF-90 material can completely remove the six types of ions mentioned above in 50 mL of agricultural water with a pH of 6.5~8.0 and an ion concentration of 0.02 mg/L within 10 min,without any leakage of Mn element.Fitting with Langmuir,Freundlich,Temkin,D-R(Dubinin-Radushkevich),and Scatchard models indicates that the material’s adsorption of various ions is primarily physical adsorption,while chemical adsorption also occurs.

关 键 词：吸附 农业用水 金属骨架结构材料 ZIF材料 

分 类 号：TQ424[化学工程] TQ139.7