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In this paper, magnetic carbon nanotubes (MCNT; CNT-CoFe2O4) were synthesized and characterized. MCNT was used to remove cationic dyes from single and multicomponent (ternary) colored systems. Basic Blue 41 (BB41), Basic Red 18 (BR18) and Basic Violet 16 (BV16) were used as cationic dyes. The effects of operational parameters (MCNT dosage, dye concentration and salt) on dye removal were investigated...