Micellar-enhanced ultrafiltration for the removal of cadmium and zinc: Use of response surface methodology to improve understanding of process performance and optimisation.
作者： Junkal Landaburu-Aguirre , Eva Pongrácz , Paavo Perämäki , Riitta L. Keiski
DOI: 10.1016/J.JHAZMAT.2010.04.066
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摘要: Abstract In this study, removal of cadmium and zinc from their respective water samples was conducted by micellar-enhanced ultrafiltration (MEUF), using sodium dodecyl sulfate (SDS) as the surfactant. Response surface methodology (RSM) used for modelling optimising process, to gain a better understanding process performance. Face Centred Composite (CCF) Design experimental design. The factors studied were pressure (P), nominal molecular weight limit (NMWL), heavy metal feed concentration (CZn, CCd) SDS (CSDS). Using RSM retention metals maximized while surfactant ratio (S/M). plots improved effect on permeate flux. Concentration polarisation negligible therefore, high NMWL membranes with provided flux metals. optimal conditions CSDS = 13.9 mM, CZn = 0.5 mM, NMWL = 10 kDa P = 3.0 bar, CSDS = 14.2 mM, CCd = 0.5 mM, P = 3.0 bar. retentions achieved 98.0 ± 0.4% 99.0 ± 0.4% cadmium. To improve resource efficiency, reclaimed after use; 84% initial recovered precipitation.
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