Extraction rates of amino acids by an emulsion liquid membrane with tri-n-octylmethylammonium chloride
✍ Scribed by Michiaki Matsumoto; Takaaki Ohtake; Makoto Hirata; Tadashi Hano
- Publisher
- Wiley (John Wiley & Sons)
- Year
- 1998
- Tongue
- English
- Weight
- 222 KB
- Volume
- 73
- Category
- Article
- ISSN
- 0268-2575
No coin nor oath required. For personal study only.
✦ Synopsis
The extraction rates of amino acids from alkaline aqueous solution into an emulsion liquid membrane containing tri-n-octylmethylammonium chloride as a carrier and Paranox 100 as an emulsiÐer were measured using a stirred transfer cell. The e †ects of agitation speed (0É33È0É66 rev s~1), amino acid concentrations (0É5È50 mol m~3) and temperature (10È45¡C) on the extraction rates were examined. The results were analyzed by a double-Ðlm model. The mass transfer coefficients of amino acids (0É26È1É58 ] 10~5 m s~1) and their complexes (0É60È1É72 ] 10~5 m s~1) were found to correlate well with the hydrophobicities of the amino acids. It was found that the surfactant layer inÑuenced the mass transfer processes of both amino acids in the aqueous Ðlm and their complexes in the organic Ðlm. The permeation of amino acids with a large hydrophobicity through the emulsion liquid membrane was promoted by both high distribution and larger mass transfer rates.