Exploring Isotherm Models for the Efficient Adsorption of Remazol Yellow on Polymer-Based Adsorbents

Abstract

Remazol yellow is type of azo dyes that is widely used in the textile industry. This dye contains a benzene group which is toxic and carcinogenic, besides this type of dye can also cloud and inhibit the process of photosynthesis in waters. The need for dye waste treatment before being discharged into the environment. This study aims to determine the isothermal approach that occurs in the adsorption of remazol yellow on quaternary ammonium polymers with a variation of time 10-60 minutes, temperature of 25-70 ° C, and initial concentration of 10-50 ppm. The filtrate from the adsorption will be calculated using a UV-Vis Spectrophotometer instrument, and the residue will be characterized by Scanning Electron Microscope  (SEM). An analysis of the Freundlich, Langmuir, Temkin and Dubinin-Radushkevich isothermal model approaches was carried out. Based on the calculation results, the adsorption process is carried out according to the Langmuir adsorption isotherm with a linearity value of 1. The macropore size at optimum time and optimum temperature is 0.34-1.35 µm, and 0.33-1.43 µm, respectively. The union size at optimum time and optimum temperature is 0.48-1.14 µm, and 0.45-1.18 µm, respectively