Abstract

Anusha Dhanagopal, Lingeswari Dheenathayalan and Vimala Thiyagarajan

DOI : http://dx.doi.org/10.13005/ojc/350621

The metal salt doped polyaniline has been used as adsorbent for the removal of synthetic dye. The influence of experimental parameters like association time, adsorbent dosage, agitating speed, pH and electrical conductivity on adsorption of Acid Red 88 was systematically investigated. More than 95% of Acid Red 88 was removed after 55 minutes of adsorbent/adsorbate contact time for 0.3g/L of PANI-CuCl2. Calculations have been carried out to analyse the impact of weight of PANI-CuCl2 composite and concentration of Acid Red 88 on the percentage of decolourisation. Kinetics and isotherm analysis were also carried out to describe the adsorption process. Electrical conductivity, SEM and FTIR technique were used to characterize the adsorbent before and after adsorption. The thermodynamic parameters like changes in free energy, enthalpy and entropy were also evolved to predict the nature of adsorption. The adsorbent is stable, easy to prepare and suitable to remove Acid Red 88 from effluent.

Polyaniline; Synthetic Dye; Adsorption; Isotherms; Kinetics and Thermodynamics

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