Adsorption study on removal of reactive blue 21 and reactive red 180 from aqueous medium using polyaniline cucl2 in the presence of uv light

Abstract

The kinetics and isotherm studies of dye–adsorbent system are processed in this work with PANI-CuCl2 as adsorbent material for the treatment of Reactive Red 180 and Reactive Blue 21 from model dye solution. Influence of quantity of dye in solution, the weight of PANI-CuCl2 composite, temperature, pH and stirring speed were surveyed by batch experiments to identify the efficiency of the adsorbent. The ability of the adsorbent is scrutinized using desorption and recyclability experiments. The obtained results are analyzed with two isotherm models and the best fit is found to be Langmuir isotherm model. This adsorption process follows the pseudo-second-order kinetics model. The thermochemical quantities like ΔG°, ΔH° and ΔS° were evaluated. Furthermore, the adsorption of dyes onto PANI-CuCl2 composite is established by conductivity study, FTIR and SEM.