Evaluation of Iron Element Efficiency in on Azo dye of Industrial Effluent

Azo as a member of chromo-gen group has different efficiency in different industries such as mutation potential and carcinogenesis. Some kinds of chromo-gen are known in primary studies. Azo chromo-gen can cause undesirable color to water and also these colors have mutation and carcinogenesis potential in human and can produce poisonous side product in environmental water. The aim of this investigation is usage of iron, element to subject an effective method to remove azo dye acid yellow 36 of water solution. This experiment fulfills in the scale of laboratory. In this experiment synthetic solution made from color and efficiency of iron powder is considered in removing the yellow 36 acid color of water solution and effects of different parameters during the contact time. Effect of iron powder is considered in efficiency of removal by iron powder. Results of experiments show that PH solution is more effective in access to more removal. From the results of the experiment it can be concluded that the time of contact of Iron in the acidy solution as an important factor through access to more color is more effective. Increasing the contact time of iron powder in the solution, decreases the time of discoloration. Results of experiments show that pH have more important role on efficient color removing and Slight pH can be more efficient to remove the color. Increasing pH from 3 to 11 with iron powder 3.33 g/l and contact time of 100 minute, removal time is decreased from about 94.84% to 16.94%. This method is recommended to remove Azo dyes from environmental water as it is simple and efficient.