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

IF 1.6 4区 化学 Q3 CHEMISTRY, MULTIDISCIPLINARY
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.

Abstract Image

Abstract Image

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
CiteScore
3.40
自引率
11.10%
发文量
216
审稿时长
7.5 months
期刊介绍: The Journal of the Chinese Chemical Society was founded by The Chemical Society Located in Taipei in 1954, and is the oldest general chemistry journal in Taiwan. It is strictly peer-reviewed and welcomes review articles, full papers, notes and communications written in English. The scope of the Journal of the Chinese Chemical Society covers all major areas of chemistry: organic chemistry, inorganic chemistry, analytical chemistry, biochemistry, physical chemistry, and materials science.
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