아미노-실란이 도입된 리그닌 유도체 합성 및 양이온성 염료 흡착제로서의 응용

In this study, we evaluated the possibility of the application of amino-silane as a cationic dye adsorbent via chemical modification using lignin. Amino-silane modified lignins (ALs) have been synthesized via amine-silanization. The ALs have high accessibility to pollut ants and stability in aqueous solutions owing to their high zeta-potential and specific surface area. Adsorption experiments showed that the ALs exhibited excellent cationic dye removal under neutral and basic conditions. Because ALs contain abundant amine groups, having a lone pair of electrons confers excellent accessibility via electrostatic attraction with cationic dyes. The maximum adsorption amount of the cationic dye reached 197.44 mg·g-1. All adsorption processes followed the pseudo-second-order kinetics, Langmuir and Temkin isotherm models, and spontaneous processes. Therefore, this study contrib utes to the development of a low-cost and sustainable lignin-based adsorbent