吸附
磺酸
钡
动力学
化学
离子
多孔性
化学稳定性
放射性废物
无机化学
化学工程
材料科学
核化学
有机化学
物理
工程类
量子力学
作者
Xudong Zhao,Lei Pei,Yanan Zhang,Hongliang Huang,Xiuhong Zheng,Baosheng Liu,Minman Tong
标识
DOI:10.1016/j.gce.2022.01.007
摘要
The simultaneous high-capacity and fast removal of radioactive barium ion (Ba2+) from nuclear wastewater is necessary but still faces large challenge. In this study, a novel adsorbent containing sulfonic group, MOF-808-SO3H, was prepared based on the oxidation of –SH group. Characterizations confirm the successful introduction of –SO3H, good porosity, and stability of the material. The adsorbent exhibits excellent capture ability for Ba2+ due to strong hard acid-base and electrostatic interactions, with the adsorption capacity of 152.0 mg g−1 and fast equilibrium adsorption time, superior to other reported materials. Optimal pH was found to be almost neutral and temperature cannot affect the adsorption largely. Besides, the irreversible adsorption was demonstrated and thereby the secondary pollution may be avoided. Therefore, our work provides an efficient adsorbent for capturing Ba2+ irreversibly, and proposes a feasible strategy for constructing adsorbents with simultaneous high adsorption capacity and fast kinetics.
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