This study aimed to prepare an efficient, cost-effective, and separable magnetic zeolite/chitosan composite (MZFA/CS) adsorbent from solid waste to deal with the water pollution of Cr(VI). The MZFA/CS was characterized by X-ray fluorescence (XRF), Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), and vibrating sample magnetometer (VSM) techniques. Then, the effect of pH, temperature, initial concentration of Cr(VI) ions, and contact time was considered in the study. For a sorbent dose of 0.1 g in 50 mL of a Cr(VI) solution, at a contact time of 30 min, temperature of 30°C, and a pH of 3, an adsorption capacity (q_e) of 16.96 mg g⁻¹ was achieved. Adsorption kinetics and isotherm data obtained for all adsorption systems were well-fitted by pseudo-second-order and Langmuir models, respectively. The thermodynamic study suggested that the adsorption process is spontaneous and endothermic in nature. In summary, the adsorbent with better separability (Ms = 16.83 emu g⁻¹) and adsorbability was successfully fabricated.

中文翻译：

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以硅烷为改性剂从水溶液中吸附六价铬的磁性沸石/壳聚糖复合材料的制备

本研究旨在从固体废物中制备一种高效、经济且可分离的磁性沸石/壳聚糖复合材料 (MZFA/CS) 吸附剂，以处理 Cr(VI) 的水污染。MZFA/CS 通过 X 射线荧光 (XRF)、傅里叶变换红外 (FTIR) 光谱、X 射线衍射 (XRD) 和振动样品磁强计 (VSM) 技术进行表征。然后，在研究中考虑了 pH 值、温度、Cr(VI) 离子的初始浓度和接触时间的影响。对于在 50 mL Cr(VI) 溶液中 0.1 g 的吸附剂剂量，在 30 分钟的接触时间、30°C 的温度和 3 的 pH 值下，吸附容量 ( q _e ) 为 16.96 mg g ^{- 1}已实现。为所有吸附系统获得的吸附动力学和等温线数据分别适合伪二级和朗缪尔模型。热力学研究表明吸附过程是自发吸热的。综上所述，成功制备了具有更好分离性（Ms  = 16.83 emu g ^-1）和吸附性的吸附剂。