Thiol containing sulfonamide based polymeric sorbent for mercury extraction

Yavuz, Erdem; Barim, Gamze; Şenkal, Bahire Filiz

doi:10.1002/app.30808

Cited by 11 publications

(11 citation statements)

References 31 publications

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“…After adsorption, they are converted to oxides in the case of Ag@citrate and sulfides 38 in the case of Ag@MSA. These conversions were investigated by XPS.…”

mentioning

confidence: 99%

Uptake of Toxic Metal Ions from Water by Naked and Monolayer Protected Silver Nanoparticles: An X-ray Photoelectron Spectroscopic Investigation

Bootharaju

Pradeep

2010

J. Phys. Chem. C

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We have studied the chemical interaction of heavy metal ions such as Hg(II), Hg(I), Pb(II), and Cd(II) of various concentrations with naked and protected silver nanoparticles (Ag@citrate and Ag@MSA, respectively, where MSA is mercaptosuccinic acid). The particles were of 30 and 8 nm diameter, respectively. We observed that the metal ions interact with both the core of the nanoparticles and the functional groups of the capping agents. We study the effects of interaction using spectroscopic and microscopic techniques such as ultraviolet-visible spectroscopy (UV-vis), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), dynamic light scattering (DLS), and in detail by X-ray photoelectron spectroscopy (XPS). The Hg(II) and Hg(I) ions were reduced to metallic mercury by both of the nanoparticles, because of the feasibility of the redox reaction, whereas no reduction was observed for Cd(II) and Pb(II). The reduction of Hg(I) and Hg(II) ions was due to electrons supplied by the core silver atoms of the nanoparticles, at lower metal ion concentrations. At higher concentrations, the metal ions were chemically bonded to the carboxylate groups of the citrate and MSA. These heavy metal ions form stable sulfides. The presence of different sulfur species, such as oxidized sulfur, disulfides, and metal sulfides, was confirmed by XPS.

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“…After adsorption, they are converted to oxides in the case of Ag@citrate and sulfides 38 in the case of Ag@MSA. These conversions were investigated by XPS.…”

mentioning

confidence: 99%

Uptake of Toxic Metal Ions from Water by Naked and Monolayer Protected Silver Nanoparticles: An X-ray Photoelectron Spectroscopic Investigation

Bootharaju

Pradeep

2010

J. Phys. Chem. C

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“…These studies reveal that the observed response for mercury ion at modified interface is due to the presence of MBT modifier molecule and can be due to the effective interaction or complexing ability of the modifier molecule with mercury ion. At the proposed electrochemical interface, the modifier molecules contains thiol group, sulphur and nitrogen atoms as potential donar atoms and are known to show potential affinity toward the mercury ion due to soft-soft interaction according to HSAB concept [24]. Since the working pH is 8, the covalently modified MBT interface is in deprotonated form that is the exocyclic thiol group dissociated into thiolate ion and the lone pair of electrons present on sulphur and nitrogen atoms are set free [15].…”

Section: Electrochemical Behavior Of Hg 2+ At Modified Interfacementioning

confidence: 99%

Diazonium functionalized exfoliated graphitic carbon as a binderless and covalently modified electrochemical interface for mercury sensing

Kempegowda

Malingappa

2013

Sensors and Actuators B: Chemical

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a b s t r a c tA sensitive and selective electrochemical sensing platform for mercury quantification at picomolar level has been described. The interface was constructed using exfoliated graphitic carbon covalently functionalized with mercaptobenzothiozole (MBT) as a selective indicator species in mercury determination. It was characterized using Fourier transform infrared spectroscopy (FTIR), cyclic voltammetry (CV) techniques and subsequently used in the fabrication of surface renewable binderless bulk modified robust pellet electrode. The fabricated electrode was used in the measurement of mercury in alkaline medium using differential pulse anodic stripping voltammetry (DPASV). The developed interface showed linearity in the concentration range 1-20 pM with a detection limit of 1 pM. The analytical utility of the proposed interface has been validated by determining the mercury levels from various water and industrial effluent samples with least interference from commonly encountered cations and anions that are generally present in industrial effluents. The storage stability of the proposed interface has been studied over a period of 6 months and the results were found to be highly reproducible with a relative standard deviation of ±6%.

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“…The polymer beads were chlorosulfonated using chlorosulfonic acid as described elsewhere for mercury extraction [29]. The chlorosulfonated beads (10 g) were added portion wise to a stirred solution of thioaniline (6.2 g, 49.6 mmol) in 2-methyl pyrrolidone (50 mL) at 08C.…”

Section: Preparation Of the Thiol-containing Resinmentioning

confidence: 99%

“…Particularly, the developing adsorbent resin without needing of any complexing reagent has the advantage of rapidity and simplicity in preconcentration step. The use of polymer-bonded ligands in preconcentration of metals has been the subject of many research articles [24,29]. Finally, slotted tube atom trap (STAT) is usefully used to improve sensitivity of FAAS as online [17,[30][31][32][33][34].…”

Section: Introductionmentioning

confidence: 99%

Novel Polymeric Resin for Solid Phase Extraction and Determination of Lead in Waters

Karaaslan

Şenkal

Cengiz

et al. 2010

CLEAN Soil Air Water

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Interest in preconcentration techniques for the determination of metals at ultratrace levels still continues increasingly because of some disadvantages of flameless atomic absorption spectrometry and the high costs of other sensitive methods in compared to flame atomic absorption spectrometry (FAAS). Among preconcentration techniques, solid-phase extraction is the most popular because of a number of advantages. In this work, thiol-containing sulfonamide resin was synthesized, characterized, and applied as a new sorption material for solid phase extraction and determination of lead in natural water samples. The optimization of experimental conditions was performed using the parameters including pH, contact time, and volumes of initial and elution solutions. After preconcentration procedure, FAAS was used for determinations. The synthesized resin exhibits the superiority in compared to the other adsorption reagents because of the fact that there is no necessity of any complexing reagent as well as high sorption capacity. Consequently, 280-fold improvement in the sensitivity of analytical scheme was achieved by combining the slotted tube atom trap-atomic absorption spectrometry (STAT-FAAS) and the developed preconcentration method. The limit of detection was found to be 0.15 ng mL À1 . The Pb 2þ concentrations in the studied water samples were found to be in the range of 0.9-6.7 ng mL À1 .

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Thiol containing sulfonamide based polymeric sorbent for mercury extraction

Cited by 11 publications

References 31 publications

Uptake of Toxic Metal Ions from Water by Naked and Monolayer Protected Silver Nanoparticles: An X-ray Photoelectron Spectroscopic Investigation

Uptake of Toxic Metal Ions from Water by Naked and Monolayer Protected Silver Nanoparticles: An X-ray Photoelectron Spectroscopic Investigation

Diazonium functionalized exfoliated graphitic carbon as a binderless and covalently modified electrochemical interface for mercury sensing

Novel Polymeric Resin for Solid Phase Extraction and Determination of Lead in Waters

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