Highly effective adsorption of cationic and anionic dyes on magnetic Fe/Ni nanoparticles doped bimodal mesoporous carbon

Journal of Colloid and Interface Science
Yuanyuan LiuYan He

Abstract

Magnetic Fe/Ni nanoparticles doped bimodal mesoporous carbon (MBMC) was prepared for highly effective adsorption of cationic dye methylene blue (MB) and anionic dye methyl orange (MO). Structure characterization demonstrated that Fe/Ni nanoparticles were embedded into the interior of the mesoprous carbon, and MBMC maintained ordered and bimodal mesopores. The effects of several parameters such as contact time, pH, temperature, ionic strength and dye molecular structure on the adsorption were investigated. Alkaline pH was better for MB adsorption, while acidic pH was more favorable for MO uptake. The adsorption capacity was slightly enhanced when existing ion concentrations increased. Adsorption on MBMC was affected by the molecular structures of different dyes, and both primary and secondary pores of MBMC were involved in dye adsorption. The adsorption kinetics fitted well with pseudo-second-order model and exhibited 3-stage intraparticle diffusion mode. Equilibrium data were best described by Langmuir model, and the estimated maximum adsorption capacity for MB and MO was 959.5mg/g and 849.3mg/g, respectively. Thermodynamic studies indicated that the adsorption process was spontaneous and endothermic. Moreover, the adsorbent co...Continue Reading

References

Apr 26, 2005·Journal of Colloid and Interface Science·V Vadivelan, K Vasanth Kumar
Dec 17, 2008·Journal of Hazardous Materials·C Noubactep
Apr 5, 2011·Journal of Colloid and Interface Science·Susan R SandemanSergey V Mikhalovsky
Jul 30, 2011·Journal of Colloid and Interface Science·Nourali MohammadiShilpi Agarwal
Sep 20, 2011·Journal of Colloid and Interface Science·Nancy V Perez-AguilarJose R Rangel-Mendez
Mar 7, 2012·The Science of the Total Environment·Piao XuZhi Feng Liu
Mar 20, 2013·Journal of Colloid and Interface Science·Wojciech KonickiUrszula Narkiewicz
Aug 29, 2013·Journal of Colloid and Interface Science·Mariana P TavlievaLyubomir T Vlaev

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Citations

Jun 27, 2018·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Yixi WangXuhong Guo
Feb 14, 2020·Nanomaterials·Shahin Homaeigohar

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