Highly efficient adsorbent for removing uranium (VI) from water based on a novel phosphate esterification hyper-cross-linked polymer

吸附 吸附 化学 朗缪尔吸附模型 核化学 废水 磷酸盐 双酚A 选择性 朗缪尔 螯合作用 无机化学 材料科学 有机化学 催化作用 废物管理 冶金 环氧树脂 工程类
作者
Yao Tian,Yudan Wang,Chao Wang,Guo Ping Zhu,Lijia Liu,Fuqiu Ma,Hongxing Dong,W. Zhang
出处
期刊:Journal of Molecular Liquids [Elsevier]
卷期号:386: 122431-122431 被引量:4
标识
DOI:10.1016/j.molliq.2023.122431
摘要

There is a strong need for the development of effective uranium sorbents. Here, the Friedel-Crafts reaction was performed in a simple one-step manner followed by phosphate esterification to prepare porous hyper-cross-linked Bisphenol F (PHCP-BF) for prospective utilization in the removal of U(VI) from wastewater. PHCP-BF has pores with a size of 2.6 nm and a significant BET surface area (up to 387.31 m2/g). It was extensively investigated how a variety of environmental conditions (e.g., pH, contact time, temperature, etc.) affected the treatment results. In terms of adsorption capacity, uranium possessed a maximum of 120 mg/g (pH = 7), which is twice that of the original material HCP-BF (59.39 mg/g). According to the modeling results, with the Langmuir isotherm and a pseudo-second-order kinetic model, the data matched the sorption data very well. It was found that PHCP-BF possessed good selectivity for uranium, which was considerably greater than that of other co-existing metals. After three cycles, PHCP-BF still maintained a certain adsorption capacity. In light of several spectroscopic examinations, the mechanism of uranium removal by PHCP-BF is the chelated of P = O with U (VI). The results obtained suggest that PHCP-BF can be used effectively to remove uranium from water.
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