Polymeric chelating resin for removal of toxic metals from various water sources and electroplating liquors

POLY 522

Lutfor Md Rahman, lutfor73@gmail.com and Jahimin R Asik, lutrinl@hotmail.com. School of Science and Technology, University Malaysia Sabah, Locked Bag No. 2073, Sabah, Kota Kinabalu, 88999, Malaysia
The future role of polymeric chelating resins in water treatment for human consumption and industrial uses and as well as environmental protection is of prime importance. Thus, a polymeric chelating ion exchange resin containing hydroxamic acid and amidoxime functional groups were prepared from poly(methyl acrylate-co-acrylonitrile) grafted sago starch (PMA-co-PAN). Therefore, PMA-co-PAN grafted sago starch was prepared by free radical initiating process and the ester and nitrile groups of the PMA-co-PAN were converted into the hydroxamic acid and amidoxime groups with hydroxylamine in alkaline solution. The chelating behavior of the prepared resin towards a series of metal ions was investigated and the binding capacities of some transition metal ions were high as copper, iron, zinc, chromium and nickel were 3.60, 2.83, 2.54, 2.38 and 2.31 mmol/g respectively at pH 6. The rate of exchange of copper ion was very fast (t1/2< 6 min). Several liquors obtained from electroplating plants, which containing Cr, Ni and Zn were used to the column packet with the prepared resin and it was found that the metals recovery were highly efficient i.e. about 96% metals could removed at the range of 3.0 ppm metals containing electroplating liquors. Therefore, the proposed polymeric chelating ligands could be used to the removal of several metal ions from industrial waste water and as well as effective ligands for environment protection.