Abstract
The effects of solution pH and degree of polymer hydrolysis on the adsorption mechanism of anionic polyacrylamide (PAM) on the alumina surface were investigated. The spectrophotometry, potentiometric titration, microelectrophoresis and thermogravimetry were applied to determine polymer adsorbed amount, surface charge density and zeta potential of solid particles in the presence and absence of PVA, as well as thermal characteristics of Al2O3 surface with the adsorbed polymer, respectively. The obtained results indicate that adsorption of PAM decreases with the increasing pH. Additionally, the polymer adsorption level depends on its degree of hydrolysis (which is equivalent to the content of carboxyl groups).
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