将植酸掺入芦苇秸秆衍生的水炭中以高效、选择性地吸附铀(VI)

IF 1.4 3区化学 Q4 CHEMISTRY, INORGANIC & NUCLEAR

Radiochimica Acta Pub Date : 2024-02-08 DOI:10.1515/ract-2023-0250

Hongtao Xia, Yuting Liu, Yang Wang, Zihao Feng, Qi Ren, Jianqi Lv, Yang Li, Yanjun Du, Yun Wang

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引用次数: 0

摘要

利用廉价的芦苇秆和无毒的植酸制备了一种创新的植酸改性芦苇秆衍生水炭复合材料（PA-C-RBC），用于去除水环境中的铀（VI）。多项表征结果表明，PA-C-RBC 具有粗糙的多孔性，含有大量羟基、羧基和磷酸基。PA-C-RBC 对铀(VI)的吸附过程符合假二阶动力学模型和 Langmuir 模型，在 pH 值为 5.0 时，理论最大吸附容量可达 418.78 mg/g。PA-C-RBC 对铀（Ⅵ）的选择性为 72.66%，分布系数为 6772.99 mL/g。由于 PA-C-RBC 上的羟基和磷酸基与 U(VI)具有很强的螯合作用，因此 PA-C-RBC 具有极佳的吸附选择性。这些发现凸显了 PA-C-RBC 从水溶液中去除铀(VI)的巨大潜力。

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Incorporation of phytic acid into reed straw-derived hydrochar for highly efficient and selective adsorption of uranium(VI)

An innovative phytic acid modified reed straw-derived hydrochar composite (PA-C-RBC) was prepared by using inexpensive reed straw and non-toxic phytic acid for the removal of uranium(VI) from aqueous environment. Several characterization results showed that PA-C-RBC was rough and porous with a large number of hydroxyl, carboxyl, and phosphate groups. The uranium(VI) adsorption process by PA-C-RBC conformed to pseudo-second-order kinetic and Langmuir models, and the theoretical maximal adsorption capacity could attain 418.78 mg/g at pH 5.0. PA-C-RBC had 72.66 % of selectivity and 6772.99 mL/g of distribution coefficient for U(VI). Due to the strong chelating between the hydroxyl and phosphate groups on PA-C-RBC and U(VI), PA-C-RBC had excellent adsorption selectivity. These finding highlighted a high potential for removing U(VI) from aqueous solutions.

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来源期刊

Radiochimica Acta 化学-核科学技术

CiteScore

2.90

自引率

16.70%

发文量

审稿时长

6 months

期刊介绍： Radiochimica Acta publishes manuscripts encompassing chemical aspects of nuclear science and technology.