Supported Liquid Membranes for Chromate Recovery. Experimental Study

Alonso, Arantza Pareja; Ortiz, Inmaculada; Irabien, Ángel

doi:10.1016/b978-0-444-88677-4.50072-6

Cited by 1 publication

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“…The use of supported liquid membranes (SLMs) for the removal of metals, including chromium, 1,[12][13][14][15][16][17][18][19] copper, 1,20-32 zinc, 1,24,29,33-41 strontium, 1,42-49 and cobalt 1,50 − 56 from aqueous solutions and waste waters has long been pursued by the scientific and industrial community. The use of SLMs for the recovery of benzylpenicillin, 57 penicillin G, [58][59][60] phenylalanine, 61-63 lactic acid, [64][65][66][67][68][69] citric acid, 67,70 − 72 propionic acid, 65,73 and butanoic acid 65,73 from aqueous solutions and fermentation broths has also long been pursued by the scientific and industrial community.…”

Section: Introductionmentioning

confidence: 99%

Removal and Recovery of Metals and Other Materials by Supported Liquid Membranes with Strip Dispersion

2003

Annals of the New York Academy of Sciences

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This paper reviews recent advances in supported liquid membranes (SLMs) with strip dispersion for removal and recovery of metals including chromium, copper, zinc, and strontium; it also discusses potential applications of SLMs for removal and recovery of other materials, including cobalt and penicillin G. The technology for chromium that we developed, not only removes the Cr(VI) from about 100-1,000 ppm to less than 0.05 ppm in the treated effluent allowable for discharge or recycle, but also recovers the chromium product at a high concentration of about 20% Cr(VI) (62.3% Na(2)CrO(4)) suitable for resale or reuse. In other words, we have achieved the goals of zero discharge and no sludge. The stability of the SLM is ensured by a modified SLM with strip dispersion, where the aqueous strip solution is dispersed in the organic membrane solution in a mixer. The strip dispersion formed is circulated from the mixer to the membrane module to provide a constant supply of the organic solution to the membrane pores. The copper SLM system that we have identified, not only removed the copper from 150 ppm in the inlet feed to less than 0.15 ppm in the treated feed, but also recovered the copper at a high concentration of greater than 10,000 ppm in the strip solution. For the zinc SLM system identified, zinc at an inlet feed concentration of 550 ppm was removed to less than 0.3 ppm in the treated feed, whereas a high zinc concentration of more than 17,000 ppm was recovered in the strip solution. For strontium removal, we synthesized a family of new extractants, alkyl phenylphosphonic acids. The SLM removed radioactive (90)Sr to the target of 8 pCi/L or lower from feed solutions of 300-1,000 pCi/L. The SLM removed cobalt from about 525 ppm to 0.7 ppm in the treated feed solution, concentrating it to at least 30,000 ppm in the aqueous strip solution. Concerning penicillin G recovery, the SLM removed penicillin G from a feed of 8,840 ppm and concentrated it to a high concentration of 41,011 ppm in the aqueous strip solution with a high recovery of about 93%.

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Section: Introductionmentioning

confidence: 99%

Removal and Recovery of Metals and Other Materials by Supported Liquid Membranes with Strip Dispersion

2003

Annals of the New York Academy of Sciences

View full text Add to dashboard Cite

show abstract

Supported Liquid Membranes for Chromate Recovery. Experimental Study

Cited by 1 publication

References 3 publications

Removal and Recovery of Metals and Other Materials by Supported Liquid Membranes with Strip Dispersion

Removal and Recovery of Metals and Other Materials by Supported Liquid Membranes with Strip Dispersion

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