Mass transfer resistance analysis of L-tryptophan extraction in an emulsion liquid membrane system

doi:10.1081/SS-100102364

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	Mass transfer resistance analysis of L-tryptophan extraction in an emulsion liquid membrane system
	Liu, XR; Liu, DS; Liu, XR (reprint author), Lanzhou Med Coll, Inst Environm Med, Lanzhou 730000, Peoples R China.
刊名	SEPARATION SCIENCE AND TECHNOLOGY
	2000
卷号	35 期号:16 页码:2707-2724
关键词	emulsion liquid membrane permeation L-trp fractional resistance rate-controlling step
ISSN号	0149-6395
DOI	10.1081/SS-100102364
文献子类	Article
英文摘要	The extraction of L-tryptophan with an emulsion liquid membrane containing di-2-ethylhexy phosphoric acid as a carrier, Span 80 as a surfactant, kerosene as a solvent, and hydrochloric acid solution as an internal phase stripping reagent, was studied. The effects of external phase pH, carrier concentration, internal stripping reagent concentration, and external initial solute concentration on the mass transfer flux were examined. The fractional resistances of external phase diffusion and emulsion globule diffusion to the overall process were defined and calculated by the proposed model. Thus, the rate-controlling steps for the overall process were quantitatively identified. For higher external phase pH and/or higher carrier concentration as well as lower external initial solute concentration, the overall process is mainly determined by the external phase diffusion. On the other hand, for lower external pH and/or lower carrier concentration, the emulsion diffusion is a rate-controlling step. However, in the majority of cases, the overall process is governed by the combined effects of both the external phase diffusion and the emulsion globule diffusion. Compared with the external phase pH and carrier concentration, the concentrations of internal stripping reagent and external initial solute are unimportant factors determining the overall process.
学科主题	Chemistry ; Engineering
出版地	NEW YORK
语种	英语
WOS记录号	WOS:000166182600009
内容类型	期刊论文
源URL	[http://ir.lzu.edu.cn/handle/262010/121767]
专题	公共卫生学院_期刊论文
通讯作者	Liu, XR (reprint author), Lanzhou Med Coll, Inst Environm Med, Lanzhou 730000, Peoples R China.
推荐引用方式 GB/T 7714	Liu, XR,Liu, DS,Liu, XR . Mass transfer resistance analysis of L-tryptophan extraction in an emulsion liquid membrane system[J]. SEPARATION SCIENCE AND TECHNOLOGY,2000,35(16):2707-2724.
APA	Liu, XR,Liu, DS,&Liu, XR .(2000).Mass transfer resistance analysis of L-tryptophan extraction in an emulsion liquid membrane system.SEPARATION SCIENCE AND TECHNOLOGY,35(16),2707-2724.
MLA	Liu, XR,et al."Mass transfer resistance analysis of L-tryptophan extraction in an emulsion liquid membrane system".SEPARATION SCIENCE AND TECHNOLOGY 35.16(2000):2707-2724.