Ultra-Fast Removal of CBB from Wastewater by Imidazolium Ionic Liquids-Modified Nano-Silica

Mengyue Zhang; Fan Yang; Nan Wang; Jifu Du; Juntao Yan; Ya Sun; Manman Zhang; Long Zhao

doi:10.3390/molecules30010024

Ultra-Fast Removal of CBB from Wastewater by Imidazolium Ionic Liquids-Modified Nano-Silica

Molecules. 2024 Dec 25;30(1):24. doi: 10.3390/molecules30010024.

Authors

Mengyue Zhang¹, Fan Yang¹, Nan Wang², Jifu Du³, Juntao Yan¹, Ya Sun¹, Manman Zhang¹, Long Zhao²

Affiliations

¹ School of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan 430040, China.
² State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
³ School of Nuclear Technology and Chemistry & Biology, Hubei University of Science and Technology, Xianning 437100, China.

Abstract

The efficient removal of dyes is of significant importance for environmental purification and human health. In this study, a novel material (Si-MPTS-IL) has been synthesized by the immobilization of imidazole ionic liquids (ILs) onto nano-silica using the radiation grafting technique. The adsorption performance of Si-MPTS-IL for Coomassie Brilliant Blue (CBB) removal is studied by a series of static adsorption experiments. It is found that Si-MPTS-IL has ultra-fast adsorption kinetics, reaching equilibrium within 2 min. The adsorption process for CBB conforms to the Langmuir model. In addition, Si-MPTS-IL exhibits a negligible impact on the adsorption efficiency of CBB with the increase in salt concentration. After six cycles of adsorption-desorption, the adsorption efficiency of Si-MPTS-IL remained above 80%, indicating excellent regenerative properties and a promising candidate for the treatment of wastewater containing CBB. A study of the mechanism indicates that the CBB capture by Si-MPTS-IL can be attributed to the synergistic effects of electrostatic interactions and pore filling.

Keywords: Coomassie brilliant blue; dye; ionic liquids; nano-silica.

Grants and funding

This work was supported by the Educational Commission of Hubei Province (B2023050) and Research Funding of Wuhan Polytechnic University (NO. 2024RZ035).