Enhanced U(VI) biomineralization by Kocuria rosea via phytate hydrolysis

IF 1.5 3区化学 Q3 CHEMISTRY, ANALYTICAL Journal of Radioanalytical and Nuclear Chemistry Pub Date : 2024-09-09 DOI:10.1007/s10967-024-09741-x

Jiarui Qu, Xuegang Wang, Xueqin Zhou, Shuo Sun, Chao Liu, Jian Wang, Xiaoxia Yu, Zhongkui Zhou, Yadan Guo

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Abstract

In this study, the mechanism by which Kocuria rosea immobilizes U(VI) ions in water via phytate hydrolysis was investigated. The results showed that the optimal initial pH value is 6.0 for uranium removal by K. rosea in the presence of phytate, SEM showed that phytate addition to the test system enhanced the particle sizes of uranium-containing crystalline products, XRD and XPS analyses revealed that in the presence of phytate, K. rosea precipitated uranium primarily as H₂(UO₂)₂(PO₄)₂·8H₂O, CaU(PO₄)₂ and Na(UO₂)(PO₄)·3H₂O. FT-IR spectroscopy also indicated that phytate hydrolysis resulted in the release of more phosphorus groups, thus enhanced the interaction between uranium and K. rosea. Taken together, phytate enhanced biomineralization while reducing the restoration cycle of uranium and increasing the size of uranium-containing crystalline particles in the products.

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Kocuria rosea 通过植酸盐水解作用提高铀(VI)的生物矿化能力

本研究调查了 Kocuria rosea 通过植酸盐水解作用固定水中铀(VI)离子的机制。XRD 和 XPS 分析表明，在植酸存在的情况下，K. rosea 主要以 H2(UO2)2(PO4)2-8H2O、CaU(PO4)2 和 Na(UO2)(PO4)-3H2O 的形式沉淀铀。傅立叶变换红外光谱也表明，植酸盐水解导致释放出更多的磷基团，从而增强了铀和 K. rosea 之间的相互作用。综上所述，植酸盐增强了生物矿化，同时减少了铀的还原周期，并增加了产物中含铀结晶颗粒的大小。

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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.