One-step facile synthesis of pomelo peel biochar activated by KOH under air atmosphere for adsorptive removal of methylene blue and oxytetracycline

IF 2.8 4区生物学 Q3 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Journal of chemical technology and biotechnology Pub Date : 2025-04-11 DOI:10.1002/jctb.7865

Mai Lien Tran, Chi Hieu Nguyen, Thi Tuong Van Tran, Ruey-Shin Juang

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引用次数: 0

Abstract

BACKGROUND

In this work, a biochar was synthesized from pomelo (Citrus maxima) peel (PBC) which is one of the popular biomass wastes, and enhanced in texture structure and surface-active functional groups via chemical activation with potassium hydroxide (KOH) under air environment. The optimal concentration of KOH solution and pyrolysis temperatures were determined. The morphology and physicochemical properties of the material were investigated by X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy and Brunauer–Emmett–Teller analysis. The activated biochar was applied to the removal of methylene blue (MB) and oxytetracycline (OTC) in water samples.

RESULTS

The adsorption of MB and OTC on the prepared biochar obeyed the Langmuir model (R² = 0.9598 and 0.9891, respectively), and the highest adsorption capacity for MB and OTC reached 268.0 and 95.6 mg g⁻¹, respectively. An isotherm study also indicated that MB followed monolayer adsorption while OTC underwent multilayer adsorption. The kinetic results suggest possible adsorption mechanisms involving electrostatic attraction, pore adsorption, hydrogen bonding and π–π interaction. High removal of MB and OTC could be obtained in solutions with a wide range of pH.

CONCLUSION

The present study revealed that PBC could be prepared under air environment with KOH activation and be an efficient adsorbent for the removal of organic pollutants from wastewater. © 2025 Society of Chemical Industry (SCI).

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空气环境下KOH活化柚皮生物炭一步法快速合成吸附去除亚甲基蓝和土环素

摘要以柚子皮（PBC）为原料，在空气环境下经氢氧化钾（KOH）的化学活化，制备了结构和表面活性官能团增强的生物炭。确定了KOH溶液的最佳浓度和热解温度。采用x射线衍射、傅里叶变换红外光谱、扫描电镜和布鲁诺尔-埃米特-泰勒分析对材料的形貌和理化性质进行了研究。采用活性炭对水样中的亚甲基蓝（MB）和土霉素（OTC）进行了脱除研究。结果制备的生物炭对MB和OTC的吸附符合Langmuir模型（R2分别为0.9598和0.9891），对MB和OTC的最高吸附量分别为268.0和95.6 mg g−1。等温线实验也表明，MB为单层吸附，OTC为多层吸附。动力学结果表明可能的吸附机制包括静电吸引、孔吸附、氢键和π -π相互作用。结论在KOH活化的空气环境下制备PBC是一种去除废水中有机污染物的高效吸附剂。©2025化学工业学会（SCI）。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.