Volume No. 2 Issue No.: 2 Page No.: 217-225 October-December 200

 

FOAM SEPARATION OF COPPER (II) FROM AQUEOUS SOLUTIONS

 

M. Arulmozhi*1 K.M.Meera Sherifa Begum and N.Anantharaman2

1. Department of Petrochemical Technology, Anna Uiversity, Trichy (INDIA)

 

Received on : July 5, 2007

 

ABSTRACT

 

Many methods are available for the separation of liquid mixtures and metal ions. Among them, foam separation technique holds great promise especially when the concentrations involved is very low. The basis for the separation is the surface adsorption phenomena. The success of this technique depends on the stability and characteristics of foam. The operation is simple with less maintenance as there are no moving parts. A fundamental study about the selective foam fractionation of Cu(II) metal ion was carried out with sodium lauryl sulphate (SLS) as foaming agent using synthetic aqueous solutions. The effect of air flow rate, liquid pool height, pH and concentration of feed solution were varied to study the performance on enrichment factor in foam separation and the enrichment ratio. The experiments were carried out to optimize the various parameters for effective separation of Cu (II) ions. From these studies it has been observed that as the height of the liquid pool increases, the separation factor also increases which is due to the fact that the residence time of bubble in the liquid pool is more. As the concentration of the bulk solution is reduced, the surface tension increases and in turn the separation factor increases. As the flow rate of air increases from 1.0 to 2.0 LPM, the separation factor decreases. The enrichment ratio is observed to be high when ever the foam is dry.

 

Keywords : Foam fractionation, Copper (II), Enrichment ratio, Foaming agent, Sodium lauryl sulphate.

 

 

BACK