吸附
水溶液
吸热过程
金属有机骨架
化学吸附
化学
朗缪尔吸附模型
腐植酸
无机化学
水溶液中的金属离子
多孔性
化学工程
材料科学
金属
核化学
有机化学
工程类
肥料
作者
Jianshe Yu,Weiping Xiong,Xin Li,Zhen Yang,Jian Cao,Meiying Jia,Rui Xu,Yanru Zhang
标识
DOI:10.1016/j.micromeso.2019.109642
摘要
Recently, metal-organic frameworks with high porosity have drawn extensive attention in environment remediation. Herein, a variety of porous metal-organic frameworks were synthesized, including MIL-53(Fe), NH2-MIL-53(Fe), NO2-MIL-53(Fe) and Br-MIL-53(Fe), to adsorb tetracycline (TCN) from aqueous solution. Results showed that the functionalized MIL-53(Fe) exhibited higher adsorption performance than the pristine MIL-53(Fe). Among MIL-53(Fe) series, Br-MIL-53(Fe) had the highest maximum adsorption capacity of 309.6 mg g−1. Effects of initial pH values, co-existed ions and humic acid on the adsorption performance of functionalized MIL-53(Fe) were investigated. The adsorption kinetics fitted well with pseudo-second order model and the adsorption isotherms matched Langmuir model, which suggested that the adsorption process was dominant by chemisorption and the adsorption surface was homogenous. Additionally, adsorption thermodynamics showed that the adsorption process of TCN on MIL-53(Fe) series were spontaneous and endothermic. More importantly, the functionalized MIL-53(Fe) demonstrated excellent recyclability and the detailed adsorption mechanism was discussed. Therefore, this work provided a strategy for fabrication of efficient MOFs-based adsorbent for antibiotic-containing wastewater treatment.
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