Solid Phase Extraction of Ni and Cd by Chelating Cellulose Functionalized with Thiolactic Acid

Andoh Takumi, Tsukinoki Satoshi, Itoh Osamu, Akama Yoshifumi

doi:10.2116/bunsekikagaku.57.1027

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チオ乳酸を化学修飾したキレート繊維によるニッケル，カドミウムの固相抽出
チオニュウサンオカガクシュウショクシタキレートセンイニヨルニッケルカドミウムノコソウチュウシュツ

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Abstract

A chelating cellulose (TLA) functionalized with thiolactic acid was synthesized, and its sorption properties were investigated for the preconcentration of Ni²⁺ and Cd²⁺ in aqueous samples. The analyte ions were quantitatively retained on the new sorbent at pH>6.0. The adsorption of one mole of Ni²⁺ or Cd²⁺ was accompanied by the release of two moles of H⁺, as given by pH-log K_d plots. The effects of the flow rate of the sample solution through a column were studied over the range of 4∼26 mL/min. For up to 26 mL/min, the retention of both metals on the adsorbent was not affected by the flow rate of the sample solution. The effects of common metal ions on the sorption of analyte ions were also examined. The adsorbent was chemically stable and the adsorption-desorption cycles could be repeated at least 20 times. The maximum sorption capacities were found to be 0.38 mmol/g for Cd and 0.40 mmol/g for Ni, respectively. The proposed method could be successfully applied to the determination of Ni and Cd in aqueous samples.

Journal

BUNSEKI KAGAKU

BUNSEKI KAGAKU 57 (12), 1027-1032, 2008

The Japan Society for Analytical Chemistry

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