Efficient removal of methylene blue from aqueous solutions using magnetic graphene oxide modified zeolite

• Published in: Journal of colloid and interface science Vol. 543; pp. 43 - 51
• Main Authors: Huang, Tiantian, Yan, Ming, He, Kai, Huang, Zhenzhen, Zeng, Guangming, Chen, Anwei, Peng, Min, Li, Hui, Yuan, Lei, Chen, Guiqiu
• Format: Journal Article
• Language: English
• Published: United States Elsevier Inc 01.05.2019
• Subjects: adsorbents; Adsorption; aqueous solutions; endothermy; Fourier transform infrared spectroscopy; Graphene oxide; magnetism; Methylene blue; MnFe2O4; pollutants; pollution control; scanning electron microscopy; sorption isotherms; thermodynamics; wastewater; X-ray diffraction; X-ray photoelectron spectroscopy; Zeolite; zeolites; MnFe2O4; Graphene oxide; Zeolite; Adsorption; Methylene blue; MnFeO
• ISSN: 0021-9797; 1095-7103; 1095-7103
• DOI: 10.1016/j.jcis.2019.02.030

[Display omitted] In this study, magnetic graphene oxide modified zeolite (Cu-Z-GO-M) composites with two different ratios of GO to zeolite (named Cu-Z-GO-M 1:2 and Cu-Z-GO-M 1:1) were synthesized by solid-state dispersion (SSD) method. The properties of zeolite-based composites were characterized by SEM, XRD, FTIR, XPS, and magnetization curves. In order to understand the pollutant removal performance of the as-prepared composites, methylene blue (MB) was used as the target pollutant in adsorption experiments. The removal efficiency of MB onto Cu-Z-GO-M composite was enhanced obviously with pH > 9. The adsorption capacities of MB onto Cu-Z-GO-M 1:1 were 82.147, 89.315, 97.346 mg/g at 298, 308, and 318 K, respectively. The removal ability of MB increased with the increase of GO content in modified composites. The adsorption behavior can be well described using a pseudo-second-order kinetic and Freundlich isotherm model. The thermodynamic analysis indicated the MB adsorption by Cu-Z-GO-M was a spontaneous and endothermic reaction. The results showed that the prepared Cu-Z-GO-M composite could be a promising adsorbent with good adsorption capacity and reusability for MB removal from wastewater.