Application of a novel plasma-induced CD/MWCNT/iron oxide composite in zinc decontamination

► A novel CD/MWCNT/iron oxide composite was synthesized by plasma-induced technique. ► CD/MWCNT/iron oxide exhibited high magnetic property and good dispersity in aqueous solution. ► The grafted β-CD enhanced the sorption capacity of CD/MWCNT/iron oxide composite toward Zn(II). ► CD/MWCNT/iron oxide could be easily separated from aqueous solution with an external magnetic field. ► CD/MWCNT/iron oxide can be repeatedly used for cost-effective disposal of wastewater.