Adsorption performances of the reusable ionic liquid–iron coordination complex (ILICC) adsorbent to remove reactive dyes

Abstract

In this paper, the reusable ionic liquid–iron coordination complex (ILICC) adsorbents were synthesized and applied to adsorb reactive dye. Adsorption performances of ILICC as solid-phase adsorbents to remove reactive dye were investigated. The percent of dye removal was 7.0% when 4.0 ml of 0.005 g L⁻¹ reactive red B-3BD was directly adsorbed in the neutral condition by 0.02 g of ILICC. The percent of dye removal for the regenerated ILICC was 91.5% when ILICC was reused 10 times. Investigation of adsorption mechanism indicated that the adsorption force was electrostatic interaction between ILICC and reactive red B-3BD dye, and the mode of adsorption was Langmuir adsorption.

Keywords:

• Ionic liquid–iron coordination complex
• Reuse
• Adsorption
• Reactive dye

Acknowledgements

This work was supported by Programs of the Natural Science Foundation of China (No. 51343002), Liaoning Key Laboratory of Functional Textile Materials, Liaoning BaiQianWan Talents Program, Technology Foundation of Liaoning (No. 201202081) and Liaoning Excellent Talents in University and Science.