Navid Nasirizadeha - Department of Textile Engineering, Yazd Branch, Islamic Azad University, Yazd, Iran
Hamed Dehghanizadeha - aDepartment of Textile Engineering, Yazd Branch, Islamic Azad University, Yazd, Iran
M. reza ahmadzadeh - aDepartment of Textile Engineering, Yazd Branch, Islamic Azad University, Yazd, Iran

Textile wastewater is in first place among industrial wastewater and causes serious environmental problems to destroy aquatic life and consume dissolved oxygen due to its strong color, high COD concentration, a large amount of suspended solids, highly fluctuating pH and high temperature. Recently a revival interest in the use of natural dyes in textile coloration has been growing. Flavonoids have the most important biological roles in plant pigmentation, possess anti-cancer, anti–viral and anti–inflammatory properties. Rutin is a flavonoid of widespread occurrence in nature. In this work, dyeing condition of wool fibers with rutin as natural dye without metal mordant which are environmental pollutant has been studied. A class of Central Composite Designs with a sub-experiment was proposed for optimization of variance condition. The optimized factors were 5.0 for the dye bath pH, 75.0 ºC for the dyeing temperature, 1.50 g for the salt quantity of dye bath and 100.0 min for the dyeing time as the independent variable.

Exhaustion, Single Component, Central Composite Design, Wool Dyeing, Rutin