The use of low cost and ecofriendly adsorbent has been investigated as an alternative to the current expensive method of removing dyes from wastewater. Cow dung cakes were collected from the nearby village which was burnt in a muffle furnace at 500℃ to obtain the required ash. This paper deals with the removal of Reactive Blue 221, Acidoll Yellow 2GNL and Olive BGL which are mainly used in textile industry, from aqueous solution by cow dung ash without any pretreatment. The adsorption was achieved under different pH, adsorbate concentration and the applicability of Langmuir and Freundlich isotherms were examined.

• V.K. Rattan(Department of Chemical Engineering and Technology, Panjab University)
• Harminder Singh(Department of Chemical Engineering and Technology, Panjab University)
• Abhiti Purai(Department of Chemical Engineering and Technology, Panjab University)