Department of Chemistry, Science and Research Branch, Islamic Azad University, Tehran, Iran.
Young Researcher and Elite Club, Yadegar-e-Imam Khomeini (RAH) Shahre Rey Branch, Islamic Azad University, Tehran, Iran.
Int J Biol Macromol. 2021 Apr 15;176:342-351. doi: 10.1016/j.ijbiomac.2021.01.219. Epub 2021 Feb 2.
In this paper for the first time, a cost-effective reinforced zeolite with cellulose nanofibers and magnetic nanoparticles (MZeo/Cellulose nanofiber) was used for the elimination of reactive red 198 (RR198) dye. The fabricated sorbent was characterized by SEM, FTIR, and XRD. The effect of operational parameters, including pH, RR198 concentration, the mass ratios of zeolite to cellulose nanofiber and zeolite coated cellulose to FeO nanoparticles, contact time, agitation speed, sorbent dosage, and temperature were studied. The prepared sorbent exhibited the maximum removal efficiency of 99% for RR198 removal at 30 °C. The presence of other dyes along with the target dye did not negatively affect the adsorption process and RR198 removal efficiency from actual water samples seemed satisfactory and rational. Equilibrium studies confirmed that both Langmuir and Freundlich models described the RR198 adsorption on MZeo/Cellulose nanofiber indicating physical and chemical interactions between the sorbent and RR198 molecules. Kinetic studies demonstrated that pseudo-second-order fitted best with experimental data. Also, thermodynamic studies showed the endothermic nature of the adsorption process. Compared to zeolite, MZeo/Cellulose nanofiber represented a promising removal efficiency for the elimination of RR198 dye from contaminated water.
本文首次使用具有纤维素纳米纤维和磁性纳米粒子的经济高效增强沸石（MZeo/Cellulose 纳米纤维）来去除活性红 198（RR198）染料。所制备的吸附剂通过 SEM、FTIR 和 XRD 进行了表征。研究了操作参数的影响，包括 pH、RR198 浓度、沸石与纤维素纳米纤维的质量比、沸石涂覆纤维素与 FeO 纳米粒子的质量比、接触时间、搅拌速度、吸附剂用量和温度。在 30°C 下，制备的吸附剂对 RR198 的去除率最高可达 99%。其他染料的存在以及目标染料不会对吸附过程产生负面影响，并且从实际水样中去除 RR198 的效率似乎令人满意且合理。平衡研究证实，Langmuir 和 Freundlich 模型都描述了 RR198 在 MZeo/Cellulose 纳米纤维上的吸附，表明了吸附剂和 RR198 分子之间的物理和化学相互作用。动力学研究表明，准二级动力学模型最符合实验数据。此外，热力学研究表明吸附过程是吸热的。与沸石相比，MZeo/Cellulose 纳米纤维对 RR198 染料从受污染水中的去除具有更高的去除效率，具有广阔的应用前景。
