Journal article

Cationic polymer and clay or metal oxide combinations for natural organic matter removal

B Bolto, D Dixon, R Eldridge, S King

WATER RESEARCH | PERGAMON-ELSEVIER SCIENCE LTD | Published : 2001

Abstract

The effect of adding suspended matter in the form of clay or metal oxide when a cationic polymer was employed as the primary coagulant was found to be beneficial. The solids provide both an adsorbent for natural organic matter (NOM) and a nucleating species for precipitating the NOM-polymer complex. Metal oxides in conjunction with a cationic polymer were more promising than clay, with effectiveness in the order Fe2O3 > Fe3O4 > Al2O3 > MnO2. Magnesium oxide at a much lower dose was nearly as effective as ferric oxide, but of course raised the pH level significantly. A simpler and more convenient way of having reactive solids present was to add alum to form flocs; for one of the waters studie..

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University of Melbourne Researchers