STABILITY OF METAL OXIDE SUSPENSION IN THE CATIONIC POLYACRYLAMIDE PRESENCE
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Keywords:metal oxide, cationic polyacrylamide, electrokinetic properties, suspension stability, polymer adsorption
The stability of metal oxide aqueous suspension in the cationic polyacrylamide (PAM) presence was examined. For this purpose the turbidimetry method was applied. Chromium(III) oxide, zirconium(IV) oxide and aluminium(III) oxide were selected for experiments. The ionic polyacrylamide with molecular weight 7 000 000 Da and containing 50% of cationic groups was applied as an adsorbate. To explain the obtained changes in the stability parameters of metal oxide suspensions in the polymer presence the spectrophotometric and electrokinetic measurements were performed. They enable determination of PAM adsorbed amount, as well as surface charge density and zeta potential of solid particles without and covered with polymeric layers. The analysis of these data led to the description of the most probable stability mechanism of solid suspension containing cationic polyacrylamide
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