A study on acid reclamation and copper recovery using low pressure nanofiltration membrane |
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| Authors: | Abdul Latif Ahmad Boon Seng Ooi |
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| Affiliation: | 1. Center for Membrane Separation and Water Science & Technology, Ocean College, Zhejiang University of Technology, 310014 Hangzhou, China;2. Zhejiang University of Water Resources and Electric Power, 310018 Hangzhou, China;3. Department of Chemical and Environmental Technology, Rey Juan Carlos University, 28933 Mostoles, Madrid, Spain;1. Center for Clean Water and Clean Energy, Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139-4307, USA;2. School of Civil and Environmental Engineering, Nanyang Technological University, Singapore 639798, Singapore;3. Singapore Membrane Technology Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University, Singapore 637141, Singapore;1. UNESCO Centre for Membrane Science and Technology, School of Chemical Engineering, The University of New South Wales, Sydney, NSW 2052, Australia;2. Ghent University, Faculty of Bioscience Engineering, Department of Applied Analytical and Physical Chemistry, Particle and Interfacial Technology Group (PaInT), Coupure Links 653, B-9000 Gent, Belgium;3. Ghent University, Faculty of Veterinary Medicine, Department of Veterinary Public Health and Food Safety, Laboratory of Chemical Analysis, Salisburylaan 133, B-9820 Merelbeke, Belgium;1. State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China;2. Environmental Engineering Programs, The Pennsylvania State University, Middletown, PA 17057, USA |
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| Abstract: | In this study, nanofiltration membrane is used to separate proton (H+) and copper ions from a ternary ions mixture (H+, Cu2+, SO42?). The performance of membrane in separating Cu2+ 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 CuSO4 concentration. In terms of H+ rejection, there is a continuous drop in rejection from 0.1 mM CuSO4 to 10 mM CuSO4 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. |
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