Adsorption and Stability Properties of Aqueous Suspension of Chromium (III) Oxide in the Presence of Synthetic and Natural Polymers: Possibilities of Solid Removal

The effects of type and content of polymer functional groups on the adsorption mechanism on the chromium (III) oxide surface were studied. Both synthetic [poly(acrylic acid) (PAA), anionic polyacrylamide (PAM), poly(aspartic acid) (ASP), block co-polymer of ASP with poly(ethylene glycol) (ASP-b-PEG)] and natural [bovine serum albumin, ovalbumin, human serum albumin, bacterial polysaccharide (exopolysaccharide EPS)] polymers were applied. For this purpose, adsorption, surface charge, zeta potential and stability measurements were carried out. The largest adsorption was found for the ASP-b-PEG (synthetic polymer) and EPS (natural polymer). The most effective destabilizers for Cr 2 O 3 removal from the aqueous suspension were PAA 240,000 and ASP 6800

Study of the Influence of Poly(acrylic acid) and Polyacrylamide on the Electrochemical Properties of the ZrO/Solution Interface

The influence of themolecular weight of poly(acrylic acid) (PAA)and polyacrylamide (PAM) on theelectrical properties of the ZrO/polymer solution interface was examined. Themain factors responsible for the observed zetapotential and surface charge changes of zr02 were defined. Changes in the ionicstructure of the Stem layer depend on the number and distribution of -COOH groups in polymer macromolecules. These groups areresponsible forthepolymer chain conformation at the surface and have an influence on theamount of polyelectrolyte adsorbed. The thicknesses of theadsorption layers and thefree energy of adsorption of the polymers examined were calculated