A series of amino/imino-carboxyl resins was synthesized in aqueous phase by a solid-phase synthesis method. The blown-up parameter confirms the feasibility for industrialization. Having exchange property with acid and base together, the resins modified by amino-carboxyl could be used as a polymer pH buffer in order to increase the impact of acid and base resistant. Except the well adsorption of heavy metals, they had ability to adsorb some organic pollutants. Concurrence sorption for inorganic and organic, this type resin can be used widely in the treatment of wastewater. Meanwhile, holding a number of functional groups, larger surface area, good cost effectiveness, as well as synthesizing in aqueous and moderate conditions, the resulting resins show good properties for the removal and even recovery of heavy-metal ions from their aqueous solutions or wastewater. (C) 2010 Elsevier B.V. All rights reserved.