The use of cost effective, easily available, efficient and eco-friendly adsorbent has been investigated as an
alternative to the current expensive methods of removing dyes from waste water. This study investigates the
potential use of Sulphuric Acid Treated Material (SATM) prepared from Polyalthia longifolia (PL) seeds for the
removal of methylene blue from aqueous solution. The effect of variables viz. adsorbent dose, initial
concentration, temperature and pH on dye removal were investigated. The observed equilibrium data have
been analyzed using Freundlich and Langmuir models. The Langmuir isotherm model was well fitted and
maximum adsorption capacity was found to be 56.49 mg/g at 298 K. The characterization of the adsorbent was
done using IR and SEM analysis. It should be kept in mind that use of biosorbent is economical in addition;
employing environment friendly methods for treatment is emphasized much more these days.