Quaternary branched polyethylenimine-based nanocomposite for removal of NO3− ions from aqueous solutions

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2024-05-02 DOI:10.1002/jccs.202400027

Maryam Khademian, Yaghoub Sarrafi, Mahmood Tajbakhsh, Vahid Hasantabar

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Abstract

This study synthesized a nanocomposite based on quaternary branched polyethyleneimine containing sodium alginate and graphene oxide and characterized by FE-SEM, EDX-MAP, XRD, FT-IR, and TGA and used as an efficient sorbent for the removal of nitrate ions. The maximum ion exchange in optimized conditions was discovered to be 75%. The experimental studies showed that nitrate removal follows the pseudo-first-order model due to more consonance. Also, Weber–Morris and Boyd models suggested that the nitrate ions adsorption on the surface of nanocomposite is not controlled only by the intraparticle diffusion step. Moreover, Langmuir, Redlich–Peterson, and Hill models exhibited high regression coefficients of 0.991, 0.993, and 0.992, respectively. Thermodynamic studies confirmed the adsorption system was spontaneous and exothermic. Recovery assay showed that more than 98% of the nitrate ion exchanged by the nanocomposite was regenerated and nanocomposite could be reused seven cycles without efficacy reducing significantly. The nanocomposite showed excellent antibacterial activity against Staphylococcus aureus and Escherichia coli cells, with minimum inhibitory concentrations of 62.5 and 125 μg mL⁻¹, and zone of growth inhibition of 17.5 ± 0.5 and 10.5 ± 0.5 mm, respectively. The results represented that the introduced nanocomposite is a useful material for the removal of nitrate ions from aqueous solution and has antibacterial properties.

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用于去除水溶液中 NO3 离子的季支化聚乙烯亚胺基纳米复合材料

本研究合成了一种基于含有海藻酸钠和氧化石墨烯的季支化聚乙烯亚胺的纳米复合材料，并通过 FE-SEM、EDX-MAP、XRD、FT-IR 和 TGA 对其进行了表征，将其用作去除硝酸根离子的高效吸附剂。优化条件下的最大离子交换率为 75%。实验研究表明，硝酸盐的去除遵循伪一阶模型，因为该模型具有更高的一致性。此外，Weber-Morris 和 Boyd 模型也表明，硝酸根离子在纳米复合材料表面的吸附不仅仅受控于颗粒内扩散步骤。此外，Langmuir、Redlich-Peterson 和 Hill 模型的回归系数也很高，分别为 0.991、0.993 和 0.992。热力学研究证实，吸附系统是自发的、放热的。回收率测定表明，纳米复合材料交换的硝酸根离子有 98% 以上被再生，纳米复合材料可重复使用 7 次而功效不会显著降低。该纳米复合材料对金黄色葡萄球菌和大肠杆菌具有良好的抗菌活性，最低抑菌浓度分别为 62.5 和 125 μg mL-1，生长抑制区分别为 17.5 ± 0.5 和 10.5 ± 0.5 mm。结果表明，所引入的纳米复合材料是一种从水溶液中去除硝酸根离子的有用材料，并具有抗菌特性。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.