EFFICIENCY EVALUATION OF TEXTILE BASIC DYE REMOVAL FROM WATER BY NANOFILTRATION

nanofiltration, widely developed over the past decade, is a promising technology for the treatment oforganic and inorganic pollutants in surface and groundwater resources. the aim of the present researchwas to study the efficiency of textile dyes removal by a commercial nanofilter nf90 (dow-film tec).dye rejection was studied using basic dye (basic chrysoidine cryst yellow gold 0.4%) with its relevantadditive. experiments were continued until the fouling time of the membrane. each experiment wasrepeated after washing to evaluate the efficiency of the washing process. results showed that the valuesof color removal were 97.98 % for the simulated textile wastewater containing basic dye. the membranewas sensitive to fouling since most of dyes were used for polyamide textile dyeing. washing themembrane with a solution including naoh (ph=12) and hcl (ph=2) showed its efficiency to solve thefouling problem. the filtration process was efficient and promising for reusing wastewater in thisindustry.