Utility of Crosslinking a Lignocellulosic Waste Polymer for Fast and Efficient Adsorption of Bimacid Red ETL dye

Abstract

A novel quaternized cross-linked lignocellulosic waste-sebacoyle-trietanolamine (QSB) polymer with excellent adsorption performance for Bimacid Red ETL dye was synthesized by a one-step reaction. Kinetic, thermodynamic, and adsorption isotherm studies were conducted to evaluate the sorption process of Bimacid Red ETL dye on the synthesized material. The experiments have demonstrated that the adsorbent/adsorbate system studied followed very fast kinetics so that the equilibrium is reached after 20 minutes of contact time. In addition, the process is controlled by the pseudo-second-order model, and the isotherm is satisfactorily described by the Langmuir mathematical model. Furthermore, the thermodynamic study revealed that the adsorption process is spontaneous and exothermic. Under ideal conditions, the as-prepared material showed a maximum dye removal capacity of 200 mg/g for the Bimacid Red ETL dye. The present work contributes to the development of chemically functionalized lignocellulosic waste materials for application in environmental protection.