Solvent extraction of mercury(II) from nitric and hydrochloric acid solutions by dihexyl sulfide.

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  • ジヘキシルスルフィドによる硝酸及び塩酸溶液からの水銀（ＩＩ）の溶媒抽出
  • ジヘキシルスルフィド ニ ヨル ショウサン オヨビ エンサン ヨウエキ カラ ノ スイギン 2 ノ ヨウバイ チュウシュツ

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Abstract

The solvent extraction of mercury(II) from nitric acid and hydrochloric acid solutions by dihexyl sulphide (DHS, R2S) in benzene has been investigated under different conditions. The organic extracts were examined by infrared and Raman spectroscopies. As a result, the following equilibrium equations are proposed for the extraction of mercury(II) by DHS: from nitric acid solutions, Hg(NO3)2(a) + mHNO3(a) + 2R2S(o) →← (R2S)2Hg(NO3)2(HNO3)m(o), where m = 0 and 1 are satisfied at [HNO3] < 4 mol dm-3 and ≥ 4 mol dm-3, respectively, in which (a) and (o) represent the aqueous and organic phases, respectively. The equilibrium equation, Hg(NO3)2(a) + mHNO3(a) + R2S(o) →← R2S · Hg(NO3)2(HNO3)m(o), is expected at a higher loading of mercury; from hydrochloric acid solutions, HgCl2(a) + 2R2S(o) →← (R2S)2HgCl2(o), and when mercury loading increases, HgCl2(a) + R2S(o) →← R2S · HgCl2(o).

Journal

  • BUNSEKI KAGAKU

    BUNSEKI KAGAKU 50 (2), 107-112, 2001

    The Japan Society for Analytical Chemistry

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