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Enhanced extraction of Fe (Ⅲ), Mg (Ⅱ) and Ca (Ⅱ) and mass transfer characteristics in planar mesh-segmented microchannel
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  • Jianhong Luo,
  • Yong Suo,
  • Zini Guo,
  • Shan Wang,
  • Run Liu,
  • Quanwu Guo
Jianhong Luo
Sichuan University School of Chemical Engineering

Corresponding Author:[email protected]

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Yong Suo
Sichuan University School of Chemical Engineering
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Zini Guo
Sichuan University School of Chemical Engineering
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Shan Wang
Sichuan University School of Chemical Engineering
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Run Liu
Sichuan University School of Chemical Engineering
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Quanwu Guo
Sichuan University School of Chemical Engineering
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Abstract

Inspired by the effect of mesh segmentation, a novel planar mesh segmentation microchannel device (PMSM) was developed to investigate the extraction efficiency of Mg (Ⅱ) from liquid-liquid and gas-liquid-liquid extraction by utilizing the segmented flow and segmentation effect of metal mesh, as well as the continuous and multi-stage process. When O/A = 1 and total flow rate Q = 4 mL/min, the extraction equilibrium value was reached in only 79.5 s, while conventional stirred extraction required 300 s. When aqueous phase residence time was kept constant and Q g = 2.5 mL/min, the maximum extraction efficiency of 31.04% was achieved in only 26.5s, which exceeded the equilibrium value of the conventional one-stage extraction. In addition, the flow patterns, total volume mass transfer coefficient (K La), extraction kinetics and the correlation diagram of We aq-We o-g-E were used to further reveal the mechanism of mass transfer enhancement.