The paper deals with the application of multiwall carbon nanotubes (CNTs) to the adsorption
of dyes from wastewater. Textile dyes are dangerous and diffused pollutant in wastewater,
and the paper results confirmed the good adsorption ability of CNTs, with respect to classic
active carbon, even for different dye types. The effect of surface treatments of CNTs was
primarily investigated, revealing that neither the presence of residual catalyst nor common
surface treatment (oxidation) affects the CNT's performances. Therefore less expensive non …