The adsorption behavior of Hydrilla Verticillata for Cu2+ and Ni2+ in wastewater was studied. The effects of pH value of the wastewater, initial con-centration of metal ions, dosage of the biosorbent, contact time and interference ions on the adsorption behavior were studied. It was found that Hydrilla Verticillata was able to adsorb the two kinds of heavy metal ions, and the adsorption reached balance 30 min later. The suitable pH value for adsorption was 5.0, and mixed-metal ions had a larger effect on the adsorption behavior of Hydrilla Verticillata for Ni2+ than for Cu2+. Moreover, the ad-sorption behavior of Hydrilla Verticillata for Ni2+ and Cu2+ could be fitted by using Langmiur, Freundlich and D-R equations. The order of adsorption capacity was ranked as Cu2+ > Ni2+.
wastewater treatmentHydrilla VerticillataCu2+Ni2+isothermal adsorption model