利用碳基吸附剂去除工业双氧水中的杂质

IF 2.8 4区生物学 Q3 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Journal of chemical technology and biotechnology Pub Date : 2024-10-17 DOI:10.1002/jctb.7765

Neda Hamzehzad Yoneslouei, Seyyed Salar Meshkat, Alireza Behroozsarand, Arash Afghan

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引用次数: 0

摘要

背景吸附法是一种广泛应用于各行各业的杂质分离技术。这种方法在设计和操作上具有灵活性，可生产出高质量的净化废水。本实验研究调查了石墨烯、氧化石墨烯和碳点等碳基吸附剂通过吸附去除杂质和提高过氧化氢浓度的效果。结果采用了多种表征技术来研究每种吸附剂的化学性质和表面形态，包括傅立叶变换红外光谱、X 射线衍射、场发射扫描电子显微镜、透射电子显微镜和布鲁瑙尔-艾美特-泰勒分析。根据规定条件下的吸附测试，合成的石墨烯去除过氧化氢中杂质的效率最高，纯度达到 45%。与氧化石墨烯和碳点样品相比，石墨烯的效率更高，纯度分别为 36% 和 32%。在实验的不同阶段，对时间、温度和吸附剂用量等各种因素进行了研究。结果表明，杂质在碳基吸附剂上的吸附是一个放热过程。结论研究表明，石墨烯结构的吸附容量高达 147.06 mg g-1，与氧化石墨烯和碳点吸附剂相比，吸附容量提高了 45%。为了获得更深入的了解，对过氧化氢的吸附进行了等温和动力学实验。结果表明，该吸附剂符合 Freundlich 等温线，表明其具有多层吸附和伪秒阶动力学特性。© 2024 化学工业学会（SCI）。

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Removal of impurities from industrial hydrogen peroxide using carbon-based adsorbents

BACKGROUND

Adsorption is a widely used technique for separating impurities in various industries. This method offers flexibility in design and operation and results in the production of high-quality purified wastewater. This experimental research investigates the effectiveness of carbon-based adsorbents, such as graphene, graphene oxide and carbon dots, in removing impurities and increasing hydrogen peroxide concentration through adsorption.

RESULTS

Various characterization techniques were used to investigate each adsorbent's chemical properties and surface morphology, including Fourier transform infrared spectroscopy, X-ray diffraction, field emission scanning electron microscopy, transmission electron microscopy and Brunauer–Emmett–Teller analysis. According to adsorption tests under the defined conditions, the synthesized graphene showed the highest efficiency in impurities removal from hydrogen peroxide, with purity level of 45%. Graphene showed higher efficiency than graphene oxide and carbon dot samples, with a purity of 36% and 32%, respectively. Various factors, such as time, temperature and adsorbent dosage, were investigated at different stages of the experiments. The results show that the adsorption of impurities on carbon-based adsorbents is an exothermic process.

CONCLUSION

It was shown that graphene structure results in an adsorption capacity of up to 147.06 mg g⁻¹, which was increased by 45% in comparison to graphene oxide and carbon dot as adsorbents. To gain further insights, isothermal and kinetic experiments on the adsorption of hydrogen peroxide were performed. The results indicate compliance with the Freundlich isotherm, suggesting multilayer adsorption and pseudo-second-order kinetics. © 2024 Society of Chemical Industry (SCI).

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来源期刊

Journal of chemical technology and biotechnology 工程技术-工程：化工

CiteScore

7.00

自引率

5.90%

发文量

268

审稿时长

1.7 months

期刊介绍： Journal of Chemical Technology and Biotechnology(JCTB) is an international, inter-disciplinary peer-reviewed journal concerned with the application of scientific discoveries and advancements in chemical and biological technology that aim towards economically and environmentally sustainable industrial processes.