Recovery of Cu(II), Zn(II) and Pb(II) by Successive Stripping after the Extraction of their Pyrrolidinedithiocarbamate Complexes in the Cationic Surfactant System.

Shoji, Tetsuo; Fujiwara, Isamu; Ochi, Kazuhiko; Murakami, Yoshiko; Sasaki, Yoshiyuki

doi:10.5985/jec.12.609

Cited by 3 publications

(4 citation statements)

References 9 publications

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“…A 1.02 ¥ 10 -2 mol dm -3 stock solution of gold(III) was prepared by dissolving weighed amounts of gold(III)chloride hydrochloric acid (Merck, Germany) in 2 cm 3 of concentrated hydrochloric acid, and then diluting to 250 cm 3 with deionized water. A 1.00 ¥ 10 -2 mol dm -3 stock solution of platinum(II) 10 was prepared by dissolving weighed amounts of potassium tetrachloroplatinate(II) (Kanto Chemicals) in 4 cm 3 of concentrated hydrochloric acid, and then diluting to 100 cm 3 Chemicals) in 4 cm 3 of concentrated hydrochloric acid, and then diluting to 100 cm 3 with deionized water. The 10% (w/v) SDBS (hard type; Tokyo Kasei, Tokyo) and 10% (w/v) SDS (Wako Pure Chemicals, Tokyo) solutions, acting as anionic surfactants, and a salting-out reagent of 20% (w/v) sodium chloride (Kanto Chemicals) solution were prepared by dissolving these reagents in deionized water.…”

Section: Methodsmentioning

confidence: 99%

“…The solution was gently heated and completely dissolved. After being left standing to cool, it was diluted with water to 1 dm 3 and filtered with No. 5 B filter paper (Toyo Roshi, Japan).…”

Section: Separation Of Lead and Tin In Soldermentioning

confidence: 99%

“…For this kind of method, phase separation due to changing the temperature and/or the addition of a saltingout reagent has been commonly used for the extraction, purification, and preconcentration of metals. [1][2][3][4][5] A micellar solution of anionic surfactants shows phase separation when the solution is cooled below the Krafft point temperature. These are the surfactant-depleted (aqueous phase) and surfactant-rich (surfactant phase) phases.…”

Section: Introductionmentioning

confidence: 99%

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Surfactant Gel Extraction of Gold(III), Palladium(II), Platinum(II), and Lead(II) as Thiourea-complexes

et al. 2009

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Anionic surfactant solutions of sodium dodecylbenzenesulfonate (SDBS) and sodium dodecylsulfate (SDS) separate into two phases through cooling of the solution and the addition of salts. Thiourea (TU) reacts with many metals to form cationic complexes of [M(TU)n] m+ ; some of them extract into the SDBS phase. The separation was examined for lead and tin in commercially purchased solders. More than 95% lead was extracted into the SDBS phase, while tin remained in the aqueous phase. An abnormal decrease in extractability was observed for the [M(TU)n] m+ of noble metal complexes at low metal concentrations. The surfactant phases of SDBS and SDS were confirmed as lamellar structures using small angle X-ray scattering (SAXS), and the stability and rigidity of this structure influenced the extractability of the [Au(TU)n] 3+ complex. The separation of gold(III) and palladium(II) was examined for the SDS system.

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Section: Methodsmentioning

confidence: 99%

“…The solution was gently heated and completely dissolved. After being left standing to cool, it was diluted with water to 1 dm 3 and filtered with No. 5 B filter paper (Toyo Roshi, Japan).…”

Section: Separation Of Lead and Tin In Soldermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Surfactant Gel Extraction of Gold(III), Palladium(II), Platinum(II), and Lead(II) as Thiourea-complexes

et al. 2009

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“…A pretreatment of the sample was carried out as follows. A 1.47 g sample of brass 19 (SMB electric clamp, Radiall, France) was decomposed in a small amount of concentrated nitric acid. The solution was heated and evaporated to dryness.…”

Section: Separation Of Copper and Zinc In Brass Alloymentioning

confidence: 99%

Ion-Pair Formation of a Copper(II)-Ammine Complex with an Anionic Surfactant and the Recovery of Copper(II) from Ammonia Medium by the Surfactant-Gel Extraction Method

et al. 2004

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The extraction and separation of copper(II), zinc(II), cobalt(II), and cadmium(II) were investigated. Both copper(II) and zinc(II) formed ammine-complexes, while cadmium(II) and cobalt(II) formed hydroxide precipitates in an ammonia medium. By the addition of sodium dodecylsulfate (SDS), a copper(II) complex formed an ion-pair (copper-ammine-DS), which was extracted into the SDS phase. However, a zinc(II) complex did not form an ion-pair, and was soluble in water. Copper(II) ion was recovered by stripping (back-extraction) after the addition of hydrochloric acid. This method was applied to the separation of copper(II) in a brass alloy.

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Recovery of chromium(VI) in chromium plating solution by using the cationic surfactant-gel adsorption method

et al. 2004

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The separation and recovery of chromium(VI) by using a cationic surfactant were investigated. Chromium(VI) reacted with cetylpyridinium chloride (CPC) to form a (HCr2O7)(CP) ion-pair under an acidic condition. This ion-pair was sparingly soluble in water, and was separated as a precipitate with CPC from aqueous solution by centrifugation. In order to desorb the chromium(VI) from CP , the reduction of chromium(VI) to chromium(III) having positive charge was performed by using sodium sulfite in the presence of sulfuric acid. Finally, chromium was then recovered as Cr(OH)3 under a basic condition. Optimization for the quantitative recovery of chromium(VI) was carried out. This method was applied to the recovery of chromium(VI) in chrome plating including Cr(III) (VI), Fe, Zn, Cu, Al, Mn and Sb.

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Recovery of Cu(II), Zn(II) and Pb(II) by Successive Stripping after the Extraction of their Pyrrolidinedithiocarbamate Complexes in the Cationic Surfactant System.

Cited by 3 publications

References 9 publications

Surfactant Gel Extraction of Gold(III), Palladium(II), Platinum(II), and Lead(II) as Thiourea-complexes

Surfactant Gel Extraction of Gold(III), Palladium(II), Platinum(II), and Lead(II) as Thiourea-complexes

Ion-Pair Formation of a Copper(II)-Ammine Complex with an Anionic Surfactant and the Recovery of Copper(II) from Ammonia Medium by the Surfactant-Gel Extraction Method

Recovery of chromium(VI) in chromium plating solution by using the cationic surfactant-gel adsorption method

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