Synthesis of functionalized terpolymer based on melamine-formaldehyde copolymer grafted by polyanilin for heavy metal removing from wastewaters

Water pollution, especially heavy metal ion pollution, is currently one of the most serious environmental problems.1,2 Heavy metal ions such as lead, copper, cadmium, zinc, nickel, and others are the most common pollutants found in industrial effluents.3 The EDTA dianhydride (EDTAD), a ramification of EDTA containing two anhydride groups per molecule, can react with hydroxyl and amino groups of other materials. The use of EDTAD to treat baker’s yeast biomass for producing biosorbents with high adsorption capacity of Pb2+ and Cu2+ ions has been reported in the literature.4 In this work, melamine- paraformaldehyde copolymer was synthesized with excess ratio of melamine to form a water soluble copolymer with –NH2 end groups. Then the aniline was graft polymerized on MF by oxidation polymerization in presence of amonium peroxy disulphate (APS). The prepared copolymer was functionalized by EDTA anhydride. The synthesized functional copolymer has a good capability for removing the heavy metal ions from wastewater. Atomic absorption spectroscopy was used in order to determine the amount of removed ion percentage. The requirements for the highest absorption were investigated and determined.

کلیدواژه ها:

Polymeric adsorbent ، Heavy metal ، Wastewaters ، Polymeric adsorbent ، Nanocomposite.