An Amidoxime-functionalized chitosan dual-network hydrogel: Enhanced uranium-water separation capacity

IF 7.7 1区 化学 Q1 BIOCHEMISTRY & MOLECULAR BIOLOGY
Nijuan Liu , Duoqiang Wang , Nana Wang , Fupeng Jin , Yuanzhuo Li , Ruijuan Wang , Hongping Zhang , Hao Liang , Ruibin Guo , Zunli Mo
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Abstract

The source and after treatment of uranium, a key aspect of its use as a nuclear fuel, had been a topic of intense debate among developers. Therefore, a novel antimicrobial amidoxime-functionalized chitosan/polyacrylamide dual network hydrogel (CP-AO) had been developed utilizing a straightforward methodology. The results demonstrated excellent adsorption capacity and selectivity for uranium extraction under varying conditions, the U(VI) removal was above 94 % when pH was 4. Batch adsorption experiments revealed that CP-AO attained a maximum uranium adsorption capacity of 886.73 mg/g at 298 K, which was higher than most reported adsorbents. The kinetic and thermodynamic studies presented that adsorption process for CP-AO conformed to spontaneous monolayer chem-adsorption, and it can reach equilibrium quickly within 120 min. In addition, the adsorption mechanism revealed that the chemical-interaction between CP-AO hydrogel and U(VI) was attributed to -OH, -NH2 and amidoxime group. Notably, the hydrogel showed optimistic anti-biosludge performance against three common bacteria (E. coli, S. aureus and B. subtilis) owing to effects of chitosan. CP-AO also especially was susceptible to be recycled, its adsorption capacity was 2.8 mg/g and 38.67 mg/g in simulated and actual seawater, respectively. Hence, this work provides a promising material for the extraction of uranium resources and new insights.

Abstract Image

偕胺肟功能化壳聚糖双网水凝胶:增强铀水分离能力。
铀的来源和后续处理是其用作核燃料的一个关键方面,一直是开发人员激烈争论的话题。因此,一种新型的抗菌脒肟功能化壳聚糖/聚丙烯酰胺双网络水凝胶(CP-AO)利用一种简单的方法被开发出来。批量吸附实验表明,CP-AO 在 298 K 时的最大铀吸附量为 886.73 mg/g,高于大多数已报道的吸附剂。动力学和热力学研究表明,CP-AO 的吸附过程符合自发单层化学吸附,可在 120 分钟内迅速达到平衡。此外,吸附机理还表明,CP-AO 水凝胶与 U(VI)之间的化学反应归因于 -OH、-NH2 和脒基。值得注意的是,由于壳聚糖的作用,该水凝胶对三种常见细菌(大肠杆菌、金黄色葡萄球菌和枯草杆菌)具有良好的抗生物污泥性能。CP-AO 还特别容易回收利用,其在模拟海水和实际海水中的吸附容量分别为 2.8 毫克/克和 38.67 毫克/克。因此,这项工作为铀资源的提取提供了一种前景广阔的材料和新的见解。
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来源期刊
International Journal of Biological Macromolecules
International Journal of Biological Macromolecules 生物-生化与分子生物学
CiteScore
13.70
自引率
9.80%
发文量
2728
审稿时长
64 days
期刊介绍: The International Journal of Biological Macromolecules is a well-established international journal dedicated to research on the chemical and biological aspects of natural macromolecules. Focusing on proteins, macromolecular carbohydrates, glycoproteins, proteoglycans, lignins, biological poly-acids, and nucleic acids, the journal presents the latest findings in molecular structure, properties, biological activities, interactions, modifications, and functional properties. Papers must offer new and novel insights, encompassing related model systems, structural conformational studies, theoretical developments, and analytical techniques. Each paper is required to primarily focus on at least one named biological macromolecule, reflected in the title, abstract, and text.
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