Enhanced removal of U(VI) by SnS2/NiCr-LDH under humic acid: synergistic effect and removal mechanism

IF 1.5 3区化学 Q3 CHEMISTRY, ANALYTICAL

Journal of Radioanalytical and Nuclear Chemistry Pub Date : 2024-09-18 DOI:10.1007/s10967-024-09751-9

Sen Lu, Yuqiang Yin, Jiacheng Bao, Hongqiang Wang, Zhiwu Lei, Eming Hu, Qi Xin, Yihao Quan, Qingliang Wang

引用次数: 0

Abstract

In this study, tin sulphide (SnS₂) and nickel–chromium hydrotalcite (NiCr-LDH) complexes (SnS₂/NiCr-LDH) were used for the simultaneous removal of U(VI) and humic acid (HA) from U(VI)-containing wastewater. The results showed that the adsorption of HA by the SnS₂/NiCr-LDH was greatly enhanced, which was 4.07 and 2.94 times higher than that of pure SnS₂ and NiCr-LDH, respectively, and the highest U(VI) adsorption quantity over SnS₂/NiCr-LDH increased from 127.81 to 446.68 mg g⁻¹ when HA was present. Density functional theory (DFT) calculations revealed that the enhanced U(VI) adsorption on SnS₂/NiCr-LDH was facilitated by the formation of a robust inner-sphere surface complex between U(VI) and HA.

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腐殖酸条件下 SnS2/NiCr-LDH 对 U(VI)的强化去除：协同效应和去除机制

本研究采用硫化锡（SnS2）和镍铬水滑石（NiCr-LDH）复合物（SnS2/NiCr-LDH）同时去除含铀废水中的六（U）烷基铀（U(VI)）和腐植酸（HA）。结果表明，SnS2/NiCr-LDH对HA的吸附能力大大增强，分别是纯SnS2和NiCr-LDH的4.07倍和2.94倍，当HA存在时，SnS2/NiCr-LDH对U(VI)的最高吸附量从127.81 mg g-1增加到446.68 mg g-1。密度泛函理论（DFT）计算表明，U(VI) 与 HA 之间形成的强健内球表面复合物促进了 SnS2/NiCr-LDH 对 U(VI) 的吸附。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Radioanalytical and Nuclear Chemistry 化学-分析化学

CiteScore

2.80

自引率

18.80%

发文量

504

审稿时长

2.2 months

期刊介绍： An international periodical publishing original papers, letters, review papers and short communications on nuclear chemistry. The subjects covered include: Nuclear chemistry, Radiochemistry, Radiation chemistry, Radiobiological chemistry, Environmental radiochemistry, Production and control of radioisotopes and labelled compounds, Nuclear power plant chemistry, Nuclear fuel chemistry, Radioanalytical chemistry, Radiation detection and measurement, Nuclear instrumentation and automation, etc.