Microwave-assisted synthesis of carbon nanotubes for the removal of toxic cationic dyes from textile wastewater

•Microwave-assisted synthesis of CNTs is considered as a clean technique.•The effect of process parameters on crystal violet removal percentage.•Batch column adsorption studies conducted.•Non-linear analysis is conducted to evaluate isotherm and kinetic parameters.•The optimized removal of crystal violet dye was found to be 81%.