Nasser Modirshahla - Department of Physical Chemistry, Tabriz Branch, Islamic Azad University, Tabriz, Iran
Arezoo Ataei - Department of Physical Chemistry, Tabriz Branch, Islamic Azad University, Tabriz, Iran

The aim of this study was to study the removal of C.I. Basic Violet 2 from aqueous solutions by adsorption technique using walnut shell as an adsorbent. The effect of operational parameters including pH, temperature, pressure of oxygen, contact time and initial concentration, adsorbent dose and particle size was investigated in a batch mode reactor. The desired operational parameters was obtained as pH(5) , temperature (297K) , pressure of oxygen (3L/min) , contact time (60 min) , initial dye concentration (12 mg/L) , adsorbent dose (0.05 g) , and particle size (100 mesh ) . The results showed that the highest correlation coefficient was obtained for the pseudo-second order kinetic model.

Basic violet; Walnut shell; Dye removal; Adsorption;Kinetic modeling