Foam stability of local surfactant on the presence of contaminant Cd ions, coffee, and oil in solution

Abstract

The foam stability of the local product of surfactant was studied. The effect on the presence of contaminants: cadmium ions, coffee, and oil in surfactant solution were investigated. The foam of local surfactant at different concentrations in the presence of contaminant was generated by using a foam generator. After the foam capacity has reached a constant value, the foam then flows to column stability until a certain height of foam volume. The stability was then measured based on the decreasing height against the increasing time. In the presence of contaminant Cd ions in the solution, it could increase slightly the stabilization of the foam, especially at 0.5x cmc. For coffee particles and oil,it has the ability to decrease the foam stability of all surfactant variation concentrations. The stability of 2.0x cmc was slightly better than 1.0xcmc and 0.5xcmc for all contaminants. The ability of coffee colloidal particles was tending to decrease the foam stability of local surfactant then by oil and Cd ion. Coffee with colloidal particles may have stronger interaction with local surfactant and thus reduce the formation of the foam. Oil also has the ability to decrease foam stability.