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J Adv Res. 2013 Nov;4(6):479-84. doi: 10.1016/j.jare.2012.08.005. Epub 2012 Oct 24.

Beneficial role of ZnO photocatalyst supported with porous activated carbon for the mineralization of alizarin cyanin green dye in aqueous solution.

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Centre for Research and Post-Graduate Studies in Chemistry, Ayya Nadar Janaki Ammal College, Sivakasi 626 124, Tamil Nadu, India.


The present investigation depicts the development of a simple and low cost method for the removal of color from textile dyeing and printing wastewater using ZnO as photocatalyst supported with porous activated carbon (AC). Photocatalytic degradation studies were carried out for water soluble toxic alizarin cyanin green (ACG) dye in aqueous suspension along with activated carbon (AC) as co-adsorbent. Different parameters like concentration of ACG dye, irradiation time, catalyst concentration and pH have also been studied. The pseudo first order kinetic equation was found to be applicable in the present dye-catalyst systems. It was observed that photocatalytic degradation by ZnO along with AC was a more effective and faster mode of removing ACG from aqueous solutions than the ZnO alone.


Activated carbon; Alizarin cyanin green dye; Photocatalytic degradation; Synergistic effect; ZnO

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