Othman Jameelah Alhadi Salih, Ngadi Norzita, Ilyas R A, Nordin Abu Hassan, Alkbir M F M, Norrrahim Mohd Nor Faiz, Knight Victor Feizal, Alzahrani Khalid A, Khan Anish, Mondal Pijush K
Faculty of Chemical and Energy Engineering, University Technology Malaysia (UTM), Skudai, Johor, 81310, Malaysia.
Faculty of Science and Arts, University Zintan, Badr, Libya.
Bioresour Bioprocess. 2025 Aug 8;12(1):86. doi: 10.1186/s40643-025-00928-y.
The adsorption of reactive black 5 (RB5) onto bamboo nanocellulose modified with polyethyleneimine (PEI) and magnetic nanoparticles (MNPs), referred to as MNCPEI (FeO, ~ 10–20 nm), were incorporated via direct dispersion during the synthesis process without surface pre-functionalization was systematically examined in aqueous solution. The efficiency of dye removal increased proportionally with the amount of MNCPEI in the modified adsorbents. Characterization studies revealed that the MNCPEI modification significantly enhanced the surface chemistry of the adsorbents while providing slight improvements in their textural properties. High removal efficiencies for the anionic dyes were consistently achieved, demonstrating the superior performance of the MNCPEI adsorbents. Optimal adsorption conditions were observed at a nanocellulose-to-PEI ratio of 1:2 and an MNP dosage of 0.3 g. The findings indicated that the adsorption of RB5 was governed by monolayer adsorption, with chemical adsorption identified as the rate-limiting step. The adsorbent exhibited a high maximum adsorption capacity (99%) for RB5, attributed to the increased availability of functional groups facilitating interaction with the dye molecules. Key parameters affecting the adsorption process, including contact time (0–180 min), adsorbent dosage (0.05–2.0 g), initial dye concentration (0.025–0.3 g/L), pH (2–9), and temperature (25–70 °C), were investigated. This study underscores the potential of bamboo-derived MNCPEI adsorbents for effective textile wastewater treatment.
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The online version contains supplementary material available at 10.1186/s40643-025-00928-y.
将通过聚乙烯亚胺（PEI）和磁性纳米颗粒（MNP）改性的竹纳米纤维素（称为MNCPEI，FeO，~10-20nm）在合成过程中通过直接分散法引入，无需表面预功能化，系统研究了其在水溶液中对活性黑5（RB5）的吸附。改性吸附剂中染料去除效率随MNCPEI用量成比例增加。表征研究表明，MNCPEI改性显著增强了吸附剂的表面化学性质，同时其结构性质略有改善。对阴离子染料始终实现了高去除效率，证明了MNCPEI吸附剂的优异性能。在纳米纤维素与PEI比例为1:2且MNP用量为0.3g时观察到最佳吸附条件。研究结果表明，RB5的吸附受单层吸附控制，化学吸附被确定为限速步骤。该吸附剂对RB5表现出高最大吸附容量（99%），这归因于促进与染料分子相互作用的官能团可用性增加。研究了影响吸附过程的关键参数，包括接触时间（0-180分钟）、吸附剂用量（0.05-2.0g）、初始染料浓度（0.025-0.3g/L）、pH值（2-9）和温度（25-70°C）。本研究强调了竹源MNCPEI吸附剂在有效处理纺织废水方面的潜力。
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在线版本包含可在10.1186/s40643-025-00928-y获取的补充材料。
