Kinetic study of Ni(II) and Zn(II) complexation with a pyridylazo extractant by a centrifugal liquid membrane method

Yoki Yulizar; Akira Ohashi; Hirohisa Nagatani; Hitoshi Watarai

doi:10.1016/S0003-2670(00)00970-3

Kinetic study of Ni(II) and Zn(II) complexation with a pyridylazo extractant by a centrifugal liquid membrane method

Yoki Yulizar, Akira Ohashi, Hirohisa Nagatani, Hitoshi Watarai

Department of Chemistry

Research output: Contribution to journal › Article › peer-review

25 Citations (Scopus)

Abstract

The centrifugal liquid membrane method, which provides an ultra-thin two phase liquid membrane system in a rotating glass cell, was successfully applied for the kinetic study of the liquid-liquid extraction of nickel(II) and zinc(II) with 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol (5-Br-PADAP) in toluene. The initial extraction rate of the metal(II) complexes depended upon the concentrations of the metal(II) ion and ligand. The rate determining step was revealed as 1:1 chelate formation of Ni(II) or Zn(II) with 5-Br-PADAP adsorbed at the liquid-liquid interface. The interfacial complexation rate constants of Ni(II)-5-Br-PADAP and Zn(II)-5-Br-PADAP were determined as (4.1 ± 0.1) x 10 and (2.4 ± 0.6) x 10³ M^-1 s^-1 at pH 6.50 ± 0.02, respectively. (C) 2000 Elsevier Science B.V.

Original language	English
Pages (from-to)	107-114
Number of pages	8
Journal	Analytica Chimica Acta
Volume	419
Issue number	1
DOIs	https://doi.org/10.1016/S0003-2670(00)00970-3
Publication status	Published - 15 Aug 2000

Keywords

5-Br-PADAP
Centrifugal liquid membrane method
Extraction kinetics
Interfacial complexation
Liquid-liquid extraction

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10.1016/S0003-2670(00)00970-3

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title = "Kinetic study of Ni(II) and Zn(II) complexation with a pyridylazo extractant by a centrifugal liquid membrane method",

abstract = "The centrifugal liquid membrane method, which provides an ultra-thin two phase liquid membrane system in a rotating glass cell, was successfully applied for the kinetic study of the liquid-liquid extraction of nickel(II) and zinc(II) with 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol (5-Br-PADAP) in toluene. The initial extraction rate of the metal(II) complexes depended upon the concentrations of the metal(II) ion and ligand. The rate determining step was revealed as 1:1 chelate formation of Ni(II) or Zn(II) with 5-Br-PADAP adsorbed at the liquid-liquid interface. The interfacial complexation rate constants of Ni(II)-5-Br-PADAP and Zn(II)-5-Br-PADAP were determined as (4.1 ± 0.1) x 10 and (2.4 ± 0.6) x 103 M-1 s-1 at pH 6.50 ± 0.02, respectively. (C) 2000 Elsevier Science B.V.",

keywords = "5-Br-PADAP, Centrifugal liquid membrane method, Extraction kinetics, Interfacial complexation, Liquid-liquid extraction",

author = "Yoki Yulizar and Akira Ohashi and Hirohisa Nagatani and Hitoshi Watarai",

note = "Funding Information: This study was financially supported by a grant-in-aid for Scientific Research (B) from the Ministry of Education, Science, Sports and Culture, Japan (No. 10440222) and for JSPS Fellows (2308).",

year = "2000",

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T1 - Kinetic study of Ni(II) and Zn(II) complexation with a pyridylazo extractant by a centrifugal liquid membrane method

AU - Yulizar, Yoki

AU - Ohashi, Akira

AU - Nagatani, Hirohisa

AU - Watarai, Hitoshi

N1 - Funding Information: This study was financially supported by a grant-in-aid for Scientific Research (B) from the Ministry of Education, Science, Sports and Culture, Japan (No. 10440222) and for JSPS Fellows (2308).

PY - 2000/8/15

Y1 - 2000/8/15

N2 - The centrifugal liquid membrane method, which provides an ultra-thin two phase liquid membrane system in a rotating glass cell, was successfully applied for the kinetic study of the liquid-liquid extraction of nickel(II) and zinc(II) with 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol (5-Br-PADAP) in toluene. The initial extraction rate of the metal(II) complexes depended upon the concentrations of the metal(II) ion and ligand. The rate determining step was revealed as 1:1 chelate formation of Ni(II) or Zn(II) with 5-Br-PADAP adsorbed at the liquid-liquid interface. The interfacial complexation rate constants of Ni(II)-5-Br-PADAP and Zn(II)-5-Br-PADAP were determined as (4.1 ± 0.1) x 10 and (2.4 ± 0.6) x 103 M-1 s-1 at pH 6.50 ± 0.02, respectively. (C) 2000 Elsevier Science B.V.

AB - The centrifugal liquid membrane method, which provides an ultra-thin two phase liquid membrane system in a rotating glass cell, was successfully applied for the kinetic study of the liquid-liquid extraction of nickel(II) and zinc(II) with 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol (5-Br-PADAP) in toluene. The initial extraction rate of the metal(II) complexes depended upon the concentrations of the metal(II) ion and ligand. The rate determining step was revealed as 1:1 chelate formation of Ni(II) or Zn(II) with 5-Br-PADAP adsorbed at the liquid-liquid interface. The interfacial complexation rate constants of Ni(II)-5-Br-PADAP and Zn(II)-5-Br-PADAP were determined as (4.1 ± 0.1) x 10 and (2.4 ± 0.6) x 103 M-1 s-1 at pH 6.50 ± 0.02, respectively. (C) 2000 Elsevier Science B.V.

KW - 5-Br-PADAP

KW - Centrifugal liquid membrane method

KW - Extraction kinetics

KW - Interfacial complexation

KW - Liquid-liquid extraction

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DO - 10.1016/S0003-2670(00)00970-3

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ER -

Kinetic study of Ni(II) and Zn(II) complexation with a pyridylazo extractant by a centrifugal liquid membrane method

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