![Sample our Physical Sciences journals, sign in here to start your FREE access for 14 days]({"type":"image" , "src" : "/sda/110819/TOC-Subject-Sample-2021-Physical-Sciences.jpg"})
Abstract
The frothers introduced into flotation systems to stabilize the mineralized froth formed by the aeration process are surface active, or adsorb at the air/water interface. However, they are often active at other interfaces in the system and this may be either beneficial or deleterious to the flotation process
This study examines the surface activity of a selection of nonionic surfactants that are commonly used in coal flotation. The surface activity, as a function of concentration in the aqueous phase, was measured at the air/water and at several solid/aqueous solution interfaces. Contact angle studies were used to elicit information about the combined adsorption at the solution/air, solution/solid and solid/air interfaces
The relationship between froth stability and bubble size with surfactant concentration, adsorption at the solution/air interface and film stability was examined in further detail.
