Chemical speciation and recovery of gold(I, III) from wastewater and silver by liquid–liquid extraction with the ion-pair reagent amiloride mono hydrochloride and AAS determination

El-Shahawi, M.S.; Bashammakh, Abdulaziz S.; Bahaffi, Saleh O.

doi:10.1016/j.talanta.2007.01.057

Cited by 73 publications

(32 citation statements)

References 24 publications

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“…Thus, preconcentration and separation techniques using liquid-liquid and liquid-solid are frequently required to improve the detection capability and the selectivity of these techniques. [10][11][12][13][14][15] A novel and low-cost liquid-liquid extraction procedure for the separation of gold(III) at a trace level from an aqueous medium of pH 5 -9 has been developed by El-Shahawi et al 10 The influence of different parameters on the sorption profiles of trace and ultra traces of gold(I) species from an aqueous cyanide media onto the solid sorbents ion-exchange polyurethane foams (IEPUFs) and commercial unloaded polyurethane foams (PUFs) based polyether type has been investigated. 11 The membrane structure and the available surface area of the polyurethane foams make it a very suitable stationary phase, and column filling material.…”

Section: Introductionmentioning

confidence: 99%

Development of an Analytical Method for Trace Gold in Aqueous Solution Using Polyurethane Foam Sorbents: Kinetic and Thermodynamic Characteristic of Gold(III) Sorption

et al. 2009

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The kinetic parameters of gold(III) sorption by unloaded polyurethane foams (PUFs) and PUFs impregnated with some onium cations e.g. tetramethylammonium perchlorate (TMA + ClO4 -), tetrabutylammonium iodide (TBA + I -), and tetraheptylammonium bromide (THA + Br -), have been determined. The retention steps were found to be fast, reached equilibrium in a few minutes and followed a first-order rate equation with an overall rate constant, k, of 0.0076 and 0.007 min -1 , respectively. The thermodynamic characteristics of gold(III) retention by the unloaded PUFs and THA + Brimmobilized PUFs have been critically studied. The negative values of DH and DS are interpreted as the exothermic and spontaneous reaction of gold(III) sorption onto unloaded PUFs and foams impregnated with THA + Br -. The cellular structure of the PUFs sorbent offer unique advantages over conventional bulk-type sorbents in the rapid, versatile effective separation and/or preconcentration of gold ions.

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Section: Introductionmentioning

confidence: 99%

Development of an Analytical Method for Trace Gold in Aqueous Solution Using Polyurethane Foam Sorbents: Kinetic and Thermodynamic Characteristic of Gold(III) Sorption

et al. 2009

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“…There are several methods for the removal of gold(III) from aqueous solutions, such as solvent extraction [5][6] and adsorption [1]. The last method seems to be the most suitable for the recovery of gold(III) in the case of low concentration due to low cost and high efficiency.…”

Section: Introductionmentioning

confidence: 99%

L-Arginine-Modified Silica for Adsorption of Gold(III)

Hastuti¹,

Nuryono²,

Kuncaka³

2015

Indones. J. Chem.

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In this research, L-arginine-modified silica (SiO 2 -Arg) with 3-glycidoxypropyl-trimethoxysilane (GPTMS) as the linking agent has been synthesized through sol gel process for adsorption of Au (III) -Arg material as an effective adsorbent for metal ions particularly gold(III). Keywords: silica; modification; L-arginine; adsorption; gold(III) ABSTRAK Dalam penelitian ini, silika termodifikasi L-arginin (SiO 2 -Arg) dengan 3-glisidoksipropil-trimetoksisilan (GPTMS) sebagai penggandeng telah disintesis melalui proses sol gel untuk adsorpsi Au(III) dalam larutan air. Tetraetil ortosilikat (TEOS) sebagai prekursor sumber silika, larutan L-arginin 0,9 M dengan berbagai perbandingan volume dan zat penggandeng dicampur bersama-sama untuk membentuk gel. SiO 2 -Arg dikarakterisasi menggunakan spektropotometer Infra Merah, analisis termogravimetri, dan analisis unsur. Adsorpsi dilakukan dalam sistem batch pada berbagai kondisi termasuk waktu kontak dan konsentrasi awal ion logam Au(III). Selektivitas adsorben terhadap Au(III) diuji dengan hadirnya ion logam Cu(II),

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“…17 DLLME papers related to metal ions report the use of chelating ligands, ion-pair reagents and ligandless-dispersive liquid-liquid microextraction. The ion-pair-DLLME (IP-DLLME) has been employed for gold following the formation of an ion pair complex between the AuCl 4 -complex and different counter ions such as amiloride mono hydrochloride, 18 victoria blue R, 19 dicyclohexylamine, 6 and benzyldimethyltetradecyl-ammoniumchloride 20 . For many years, it has been well-known that gold is determined using a spectrophotometric method based on the reaction of AuCl 4 -with the cationic form of Rhodamine B to give a violet ion pair complex.…”

Section: Introductionmentioning

confidence: 99%

Ion Pair-Dispersive Liquid-Liquid Microextraction Coupled to Microsample Injection System-Flame Atomic Absorption Spectrometry For Determination of Gold at Trace Level in Real Samples

Höl

Kartal²,

Akdoğan³

et al. 2015

ACSi

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A novel ion pair-dispersive liquid-liquid microextraction (IP-DLLME) of gold followed by its determination with microsample injection system -flame atomic absorption spectrometry (MIS-FAAS) was developed. The extraction method was based on the reaction of anionic tetrachloro gold(III) complex with the cationic form of Rhodamine B to give a violet ion pair complex, which is extracted from 1.0 mol L -1 HCl solution of 8.0 mL to fine droplets of chloroform of 500 μL. A Plackett-Burman experimental design of MINITAB statistical program was employed to optimize the influence of main parameters to be controlled in DLLME. After optimizing the extraction conditions, gold was quantitatively recovered by preconcentration factor 40, limit of detection (LOD) 1.8 μg L -1 and relative standard deviation less than 6.8%. The proposed method was successfully applied to the preconcentration and determination of gold in some samples such as tap water, waste water, copper electrolysis solution and copper wire coated with nickel.

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Chemical speciation and recovery of gold(I, III) from wastewater and silver by liquid–liquid extraction with the ion-pair reagent amiloride mono hydrochloride and AAS determination

Cited by 73 publications

References 24 publications

Development of an Analytical Method for Trace Gold in Aqueous Solution Using Polyurethane Foam Sorbents: Kinetic and Thermodynamic Characteristic of Gold(III) Sorption

Development of an Analytical Method for Trace Gold in Aqueous Solution Using Polyurethane Foam Sorbents: Kinetic and Thermodynamic Characteristic of Gold(III) Sorption

L-Arginine-Modified Silica for Adsorption of Gold(III)

Ion Pair-Dispersive Liquid-Liquid Microextraction Coupled to Microsample Injection System-Flame Atomic Absorption Spectrometry For Determination of Gold at Trace Level in Real Samples

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