Intermittent partition walls promote solvent extraction of metal ions in a microfluidic device

Tatsuo Maruyama, Tomoaki Kaji, Tomohiro Ohkawa, Ken Ichiro Sotowa, Hironari Matsushita, Fukiko Kubota, Noriho Kamiya, Katsuki Kusakabe, Masahiro Goto

Research output: Contribution to journalArticle

48 Citations (Scopus)

Abstract

Liquid-liquid extraction of metal ions was carried out in a microfluidic device which had intermittent partition walls in the center of the confluent microchannel 100 μm wide, 20 μm deep and 3 cm long. The intermittent partition walls (50 μm long) stabilized a two-phase (n-heptane-water) flow and allowed clear phase separation at the end-junction of the microchannel. Using this two-phase flow in the microchannel, yttrium ions were successfully extracted in a complex form with an extractant PC-88A (2-ethylhexyl phosphonic acid mono-2-ethylhexyl ester) from a feed aqueous phase to a n-heptane phase within a contact time of 1.5 s. Although the apparent interfacial area in the microchannel was reduced by introducing the partition walls, the presence of the partition walls improved the extraction efficiency 2-3 fold at a contact time of 0.12-0.24 s. Flow analyses using fluorescent beads and a computational fluidic dynamics simulation revealed that the partition walls induced a slight turbulence in the two-phase flow in the microchannel. This slight turbulence would result in the mixing of the aqueous phase and promote the transport of yttrium ions from the aqueous feed phase to the organic extractant phase.

Original languageEnglish
Pages (from-to)1008-1013
Number of pages6
JournalAnalyst
Volume129
Issue number11
DOIs
Publication statusPublished - Nov 1 2004

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Lab-On-A-Chip Devices
Yttrium
Solvent extraction
Microchannels
Microfluidics
Metal ions
Metals
Ions
Liquid-Liquid Extraction
ion
metal
Ion Transport
yttrium
two phase flow
Heptane
Two phase flow
Turbulence
turbulence
Water
liquid

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry
  • Biochemistry
  • Environmental Chemistry
  • Spectroscopy
  • Electrochemistry

Cite this

Intermittent partition walls promote solvent extraction of metal ions in a microfluidic device. / Maruyama, Tatsuo; Kaji, Tomoaki; Ohkawa, Tomohiro; Sotowa, Ken Ichiro; Matsushita, Hironari; Kubota, Fukiko; Kamiya, Noriho; Kusakabe, Katsuki; Goto, Masahiro.

In: Analyst, Vol. 129, No. 11, 01.11.2004, p. 1008-1013.

Research output: Contribution to journalArticle

Maruyama, T, Kaji, T, Ohkawa, T, Sotowa, KI, Matsushita, H, Kubota, F, Kamiya, N, Kusakabe, K & Goto, M 2004, 'Intermittent partition walls promote solvent extraction of metal ions in a microfluidic device', Analyst, vol. 129, no. 11, pp. 1008-1013. https://doi.org/10.1039/b411630p
Maruyama, Tatsuo ; Kaji, Tomoaki ; Ohkawa, Tomohiro ; Sotowa, Ken Ichiro ; Matsushita, Hironari ; Kubota, Fukiko ; Kamiya, Noriho ; Kusakabe, Katsuki ; Goto, Masahiro. / Intermittent partition walls promote solvent extraction of metal ions in a microfluidic device. In: Analyst. 2004 ; Vol. 129, No. 11. pp. 1008-1013.
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