Abstract
Poly urea formaldehyde –Bentonite (PUF-Bentonite) composite was tested as new adsorbentfor removal of mefenamic acid (MA) from simulated wastewater in batch adsorption procedure. Developed a method for preparing poly urea formaldehyde gel in basic media byusing condensation polymerization. Adsorption experiments were carried out as a function ofwater pH, temperature, contact time, adsorbent dose and initial MA concentration .Effect ofsharing surface with other analgesic pharmaceuticals at different pH also studied. Theadsorption of MA was found to be strongly dependent to pH. The Freundlich isotherm modelshowed a good fit to the equilibrium adsorption data. From Dubinin–Radushkevich model themean free energy (E) was calculated and the value of 5 KJ/mole indicated that the mainmechanism governing the adsorption of MA on PUF-Bentonite composite was physical innature. The kinetics of adsorption tested for first order, pseudo second order models andElovich’s equation, results showed the adsorption followed the pseudo-second-order model.
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