A study on acid reclamation and copper recovery using low pressure nanofiltration membrane

作者：Ahmad Abdul Latif; Ooi Boon Seng^*

来源：Chemical Engineering Journal, 2010, 156(2): 257-263.

DOI：10.1016/j.cej.2009.10.014

• Copper
• Proton
• Sulfate
• Nanofiltration
• pH

In this study, nanofiltration membrane is used to separate proton (H(+)) and copper ions from a ternary ions mixture (H+, Cu(2+), SO(4)(2-)). The performance of membrane in separating Cu(2+) and H(+) was tested under the effect of pressure, concentration and different acid strength (pH). It was found that the H(+) rejection is independent of the applied pressure. Permeability of solution decreased linearly with the increase of CuSO(4) concentration. In terms of H(+) rejection, there is a continuous drop in rejection from 0.1 mM CuSO(4) to 10 mM CuSO(4) solution. H(+) was poorly retained and concentrated in the permeate stream in corresponding to the electro-neutrality requirements, on the other hand, the rejection of copper ion was almost constant with pH. In overall, optimum acid reclamation and copper recovery can be achieved at higher volume flux. A Three Parameters-Combined Film-Extended Nernst-Planck Equation (CF-ENP) model is successfully applied to predict the performance of nanofiltration membrane in separating the ternary ions.

• 出版日期2010-1-15