吸附
水溶液
化学
朗缪尔吸附模型
动力学
金属有机骨架
无机化学
纳米-
铬
水溶液中的金属离子
金属
化学工程
过滤(数学)
核化学
物理化学
有机化学
工程类
物理
统计
量子力学
数学
作者
Shibiao Wu,Yihe Ge,Yaqin Wang,Chen Xia,Feifei Li,Xuan Han,Xi Li
标识
DOI:10.1080/09593330.2017.1344732
摘要
An efficient adsorbent, nano Uio-66-NH2 Metal-organic frameworks (MOFs), for the high efficiency removal of Cr(VI) from aqueous solution was successfully synthesized. The adsorbent was characterized and its performance in Cr(VI) removal was evaluated for the first time. Kinetic data reveal that the Cr(VI) adsorption is rapid in the beginning followed by a slower adsorption process; The Cr(VI) adsorption kinetics were well described by the pseudo-second-order kinetics model. The calculated adsorption capacity of this adsorbent for Cr(VI) by Langmuir model was 32.36 mg/g at pH 6.5. The temperature-dependent isotherms indicated that the adsorption reaction of Cr(VI) on the MOFs was a spontaneous process. Filtration experiments revealed that the membranes fabricated by the MOFs could quickly remove Cr(VI) ions from the aqueous solutions. Electrostatic attraction between Uio-66-NH2 and Cr(VI) should be the mechanism for Cr(VI) adsorption by Uio-66-NH2.
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