A magnetic Schiff’s base chitosan-glutaraldehyde/Fe₃O₄ composite (CHT-GLA/ZnO/Fe₃O₄) was developed by incorporating zinc oxide (ZnO) nanoparticles into its structure to prepare an efficient adsorbent for the removal of remazol brilliant blue R (RBBR) dye. The CHT-GLA/ZnO/Fe₃O₄ was characterized by the following methods: CHN, BET, FTIR, XRD, SEM–EDX, pHpzc, and potentiometric titrations. Box-Behnken design based on response surface methodology was used to optimize the effects of the A: ZnO nanoparticles loading (0–50%), B: dose (0.02–0.1 g), C: pH (4–10), D: temperature (30–60 °C), and time E: (10–60 min) on the synthesis of the magnetic adsorbent and the RBBR dye adsorption. The experimental data of kinetics followed the pseudo-second order model, while isotherms showed better fit to Freundlich and Temkin models. The maximum adsorption capacity of the target nanocomposite (CHT-GLA/Fe₃O₄ containing 25% ZnO or CHT-GLA/ZnO/Fe₃O₄-25) was reached of 176.6 mg/g at 60 °C. The adsorption mechanism of RBBR onto CHT-GLA/ZnO/Fe₃O₄ nanocomposite can be attributed to multi-interactions including electrostatic attractions, hydrogen bonding, Yoshida H-bonding, and n-π interactions. This study offers a promising hybrid nanobiomaterial adsorbent in environmental nanotechnology to separate and remove the contaminants such as organic dyes from wastewater.

通过将氧化锌（ZnO）纳米粒子掺入其结构中，开发了磁性席夫碱壳聚糖-戊二醛/ Fe ₃ O ₄复合材料（CHT-GLA / ZnO / Fe ₃ O ₄），从而制备了一种高效吸附剂，用于去除甲磺酸酚醛蓝R（RBBR）染料。CHT-GLA / ZnO / Fe ₃ O ₄用以下方法表征：CHN，BET，FTIR，XRD，SEM-EDX，pHpzc和电位滴定法。基于响应表面方法的Box-Behnken设计用于优化以下影响：A：ZnO纳米颗粒负载量（0–50％），B：剂量（0.02–0.1 g），C：pH（4-10），D：温度（30–60°C）和时间E：（10–60分钟）合成磁性吸附剂和RBBR染料。动力学实验数据遵循伪二级模型，而等温线显示更适合Freundlich和Temkin模型。目标纳米复合材料（含有25％ZnO的CHT-GLA / Fe ₃ O ₄或CHT-GLA / ZnO / Fe ₃ O ₄的最大吸附容量-25）在60°C下达到176.6 mg / g。RBBR在CHT-GLA / ZnO / Fe ₃ O ₄纳米复合材料上的吸附机理可归因于多种相互作用，包括静电吸引，氢键，吉田H键和n-π相互作用。这项研究为环境纳米技术提供了一种有前途的混合纳米生物材料吸附剂，可以从废水中分离和去除污染物，例如有机染料。