Optimal analysis for leaching of lead from processed anode slime

triethanolamine (TEA) was investigated by using full factorial and
orthogonal design techniques. The effects of TEA concentration,
solid/liquid ratio, temperature, and contact time on the leaching
process were evaluated to determine the interactions between the
parameters. The major factors for the system were found to be TEA
concentration and reaction temperature. The highest recovery is
obtained at process conditions of 3.5 M TEA concentration, reaction
time of 150 min, solid/liquid ratio of 1/10, and a temperature of 313
K. A polynomial model between the important parameters and
response was deduced using variance analysis at 95 % confidence
level. The analytical performance for measurement at the point of
optimum by this technique was found to be superior and more
proper than that of one variable at a time.