| Abstract: | The performance of continuous cross-flow micellar enhanced ultrafiltration (MEUF) is evaluated for the selective separation of nickel (Ni2+) and cobalt (Co2+) from the aqueous stream using anionic surfactant sodiumdodecyl sulfate (SDS) and the mixture of the anionic and nonionic surfactant (SDS+TritonX-100) with the addition of iminodiacetic acid (IDA) as a chelating agent. Operating parameters like operating time (upto 100 min), cross flow rate (100–175 mL/min.), pH of the feed solution (3-6
Cheryan , M. ( 1998 ) Process Design in Ultrafiltration and Microfiltration Handbook ; Technomic Publishing Co. Inc : USA .
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Baek , K. ;
Yang , J.W. ( 2004 ) Cross flow micellar-enhanced ultrafiltration for removal of nitrate and chromate: competitive binding . J. Hazard. Mater. , B108 : 119 – 123 .
Yurlova , L. ;
Kryvoruchko , A. ;
Kornilovich , B. ( 2002 ) Removal of Ni (II) ions from waste- water by micellar-enhanced ultrafiltration . Desal. , 144 : 255 – 260 . ), molar concentration ratio of the chelating agent to metals (C/M ratio, 0.5–2.5), and molar concentration ratio of the surfactant to metals (S/M ratio, 5–9) were studied to investigate the effectiveness of the process on selective separation. For the single surfactant system at all empirically selected parameters, 92% Ni2+ in the permeate and 94% Co2+ in the retentate was achieved whereas for the mixed surfactant system 93% Ni2+ in permeate and 84% Co2+ in retentate was achieved. Flux variation for single and mixed surfactant system was studied. Flux observed for the single surfactant system was 36 L/m2.h and for the mixed surfactant system was 31.5 L/m2.h. Flux measurement also indicates insignificant fouling of the membrane. |
