Does cationic polyacrylamide have effective flocculant behaviour?

They concluded that cationic and anionic polyacrylamide showed effective flocculant behaviour at pH 6 and pH 11 respectively. Leet and Somasundaran studied adsorption of neutral polyacrylamide (MW 700 kg/mol) on a series of mineral oxides including Fe 2 O 3, Cr 2 O 3, Al 2 O 3, TiO 2, SnO 2 and SiO 2 (Leet and Somasundaran, 1989).

Does anionic polyacrylamide adsorb more strongly to iron oxide at low pH?

Anionic polyacrylamide adsorbed more strongly to iron oxide at low pH. Anionic polyacrylamide adsorption exceeded that of neutral polyacrylamide at low pH. Acrylamide-based polymers such as polyacrylamide (PAM) and their derivatives are widely used as additives to enhance solid-liquid separation in the mineral processing industry.

What are high-molecular-weight polymers based on anionic polyacrylamides?

High-molecular-weight polymers based on anionic polyacrylamides (PAMs) are used as tailing flocculants in mineral processing plants. The recirculation of water recovered from the tailing thickeners to the flotation process introduces residual PAMs, which can impact the flotation of important copper sulfides like chalcopyrite, bornite, and enargite.

Does polyacrylamide behave at oxide-aqueous solution interfaces?

Acrylamide-based polymers such as polyacrylamide (PAM) and their derivatives are widely used as additives to enhance solid-liquid separation in the mineral processing industry. Thus, an investigation of polyacrylamide behaviour at oxide-aqueous solution interfaces is of vital importance.

Is polyacrylamide adsorption on iron oxide selective?

Polyacrylamide adsorption on iron oxide is selective over silica as a function of pH. The adsorption of polyacrylamide on magnetite and hematite was compared. Anionic polyacrylamide adsorbed more strongly to iron oxide at low pH. Anionic polyacrylamide adsorption exceeded that of neutral polyacrylamide at low pH.

Does an anionic polyacrylamide depress the flotation of chalcopyrite and enargite?

This issue has been rarely studied. In this work, results on the effect of an anionic polyacrylamide (PAM) of medium–low anionicity on the flotation of chalcopyrite, enargite, and bornite are reported and analyzed. The results show that PAM molecules depress the flotation of chalcopyrite, enargite, and bornite under a wide range of pH values.