Dendrimers PAMAM-OH / titania composites can be used as the metal chelate compound to process the waste water containing metal ions, especially in industrial plating wastewater treatment, it has a promising application. For different metal, optimum pH of ions of electroplating wastewater treatment is different, Cu2+ and Cr3+ optimum treatment at pH7, the metal ion removal rate are 96.6%, 99.9%, and Ni2+ optimum processing at pH9, remove rate is 99.8%.Weihai CY Dendrimer Technology Co. Ltd forwards from “Remediation of Cu(II), Ni(II), and Cr(III) ions from simulated wastewater by dendrimer/titania composites”.