@proceedings {26014, title = {Selective recovery of metal values from electroplating sludges: a numerical and modeling approach}, journal = {Energy and Electrochemical Processing for a Cleaner Environment}, volume = {97}, number = {28}, year = {1998}, pages = {323-329}, publisher = { Electrochemical society }, address = {Paris, France}, abstract = { Calculations and computations are applied to find the optimal conditionts (pH, [NH3], ...) of a selective recovery of metal values from the electroplating sludges. This study compares a classical and approximate method, based on the superposition of solubility-pH-complex diagrams, and our rigorous approach, The studied example is the selective recovery of Ni++ and Cu++ from their hydroxide sludges by an ammoniacal leaching. We introduce also a direct relation between the solubility and the total concentration of NH3, [NH3]T }, author = {Kamel-Eddine Bouhidel and Ramdane Salhi} }