1,4,8,11-Tetraazacyclotetradecane bound to poly(p-chloromethylstyrene–ethylene glycol dimethacrylate) microbeads for selective gold uptake

Kavaklı, Pınar Akkaş; Özvatan, Nilgün; Tuncel, S. Ali; Salih, Bekir

doi:10.1016/s0003-2670(02)00484-1

Cited by 31 publications

(15 citation statements)

References 33 publications

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“…20 -26 However, little was reported on the dependence of metal ion adsorption on chelating-functional group density, pH value, and temperature and the cyclic adsorption-desorption process for their reuse. 25,28,29 In many studies, reactive monomers such as AA, 17 GMA, [21][22][23] and styrene 20,24 were copolymerized with hydrophobic monomers in the presence of a bifunctional crosslinker to prepare water-insoluble membranes and beads, and then the chelate-forming functional groups were introduced to the resultant membranes and beads. On the other hand, we aimed at preparing the practically reusable chelating membranes from the generally used polymers.…”

Section: Introductionmentioning

confidence: 99%

Adsorption and desorption properties of the chelating membranes prepared from the PE films

Yamada

Nagano

Hirata

2005

J of Applied Polymer Sci

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ABSTRACT:The chelating membranes for adsorption of metal ions were prepared by the photografting of glycidyl methacrylate (GMA) onto a polyethylene (PE) film and the subsequent modification of the resultant GMA-grafted PE (PE-g-PGMA) films with disodium iminodiacetate in an aqueous solution of 55% DMSO at 80°C. The adsorption and desorption properties of the iminodiacetate (IDA) groupappended PE-g-PGMA (IDA-(PE-g-PGMA)) films to Cu ions were almost the same in each cyclic process of adsorption in a CuCl 2 buffer at pH 5.0 and desorption in an aqueous 1.0M HCl solution. These results indicate that the IDA-(PE-g-PGMA) films can be applied to a repeatedly generative chelating membrane for adsorption and desorption of metal ions.

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Section: Introductionmentioning

confidence: 99%

Adsorption and desorption properties of the chelating membranes prepared from the PE films

Yamada

Nagano

Hirata

2005

J of Applied Polymer Sci

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“…Also, it could be very toxic for human, animal and plants and account as a pollutant, because of its inhibiting effect upon the activity of many enzymes and its preventing effect upon the DNA separation [2]. Numerous methods such as, spectrometric methods [1], UV-Vis spectrophotometry [2,3], electrothermal atomic absorption spectrometry [4], inductively coupled plasma combined with optical emission spectrometry [5,6] or mass spectrometry [7] and flame atomic absorption spectrometry (FAAS) have been proposed for the determination of gold in different environmental samples. However, most of aforementioned methods except to FAAS involve a greater cost and increased instrumentation complexity, limiting its widespread application to routine analytical works.…”

Section: Introductionmentioning

confidence: 99%

Ultrasound-Assisted Emulsification Dispersive Liquid-Liquid Microextraction Based on Solidification of Floating Organic Droplet for Separation of Trace Gold Prior to Flame Atomic Absorption Spectroscopy Determination

Mohammadi¹,

Karimi²,

Shiebani³

et al. 2011

AJAC

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In the present work, a ultrasound-assisted emulsification dispersive liquid-liquid microextraction based on solidification of floating organic droplet method has been developed as a sample preparation method prior to flame atomic absorption spectrometry determination of trace amounts of gold in the standard, wastewater and river water samples. In the proposed method, 1-dodecanol and 5-(4-dimethylamino-benzylidene) were used as extraction solvent and chelating agent, respectively. Several factors that may be affected on the extraction process, such as type and volume of the extraction solvent, ionic strength, pH of the aqueous solution, extraction temperature and extraction time were studied and optimized. Under the best experimental conditions, the calibration curve exhibited linearity over the range of 8.0 ng·mL −1 -3.0 µg·mL −1 with a correlation coefficient of 0.9978 and detection limit based on three times the standard deviation of the blank signal was 1.5 ng·mL −1 . Eight replicate determinations of 0.2 and 1.0 g·mL −1 of gold gave a mean absorbance of 0.051 and 0.253 with relative standard deviations of ±2.3% and ±1.5%, respectively. Finally, the developed method was successfully applied to the extraction and determination of gold ions in a silica ore, wastewater, river water and standard samples and satisfactory results were obtained.

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“…It could be also very toxic for human and animal organism and plants and account as the pollutant, because of its inhibiting effect upon the activity of many enzymes and its preventing effect upon the DNA separation. 2 Numerous methods for gold determination are known: spectrometric methods, 1 UV-Vis spectrophotometry, 2,3 electrothermal atomic absorption spectrometry (ETAAS), 4 inductively coupled plasma combined with optical emission spectrometry (ICP-OES) 5,6 or mass spectrometry (ICP-MS) 7 were applied for a variety of samples in the analysis of gold.…”

Section: Introductionmentioning

confidence: 99%

Separation and preconcentration trace amounts of gold by using modified organo nanoclay closite 15A

2010

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Recebido em 7/10/09; aceito em 14/3/10; publicado na web em 20/7/10The application of organo nanoclay 5-(4-dimethylamino-benzylidene) rhodanine-immobilized as a new, easily prepared, and stable solid sorbent for preconcentration trace amounts of Au(III) ions in aqueous solution is presented. The sorption of Au(III) ions was quantitative in the pH range of 2-4, and quantitative desorption occurred instantaneously with 10.0 mL of a mixture containing 0.5 mol L -1 Na 2 S 2 O 3 and KSCN. Various parameters, such as the effect of pH, breakthrough volume, extraction time, and interference of a large number of anions and cations have been studied. The proposed method has been applied for determination of trace amount of gold in water samples.

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1,4,8,11-Tetraazacyclotetradecane bound to poly(p-chloromethylstyrene–ethylene glycol dimethacrylate) microbeads for selective gold uptake

Cited by 31 publications

References 33 publications

Adsorption and desorption properties of the chelating membranes prepared from the PE films

Adsorption and desorption properties of the chelating membranes prepared from the PE films

Ultrasound-Assisted Emulsification Dispersive Liquid-Liquid Microextraction Based on Solidification of Floating Organic Droplet for Separation of Trace Gold Prior to Flame Atomic Absorption Spectroscopy Determination

Separation and preconcentration trace amounts of gold by using modified organo nanoclay closite 15A

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