ceutical and many other industries .The loss of Azo dyes during their application may vary from 2% for basic dyes to as high as 50% for reactive dyes, resulting in the generation of a great quantity of azo dye wastewater. Besides the aesthetic concems caused by azo dyes entering into natural water bodies, many azo dyes and their breakdown derivatives have been considered to be mutagenic and carcinogenic. Moreover, high concentrations (40-100g/L) of salt (NaCl,Na2SO4) were generally applied in dye baths to reach miximal fixation of dyes to fibers in textile industry . Therefore, as high as 15%-20% salt concentrations has een observed in dye-stuff industry wastewaters