Dyes treatment in wastewater using adsorption processes

Abstract

Dyes contaminated in wastewater come from many sources. These dyes are difficult to decompose and also carcinogenic. Contamination of dyes in water reduces primary production due to decrease in light penetration. Moreover, it is not desirable and causes scenery impact. Therefore, it is very important to treat the wastewater before disposal. Adsorption has been preferred because of its effectiveness. This review describes the treatment of dyes in wastewater using adsorption processes on various types of dyes, the use of activated carbon and agricultural and industrial solid wastes as adsorbent to remove dyes, adsorption factors, column adsorption and adsorption isotherms.