Glycine modified graphene oxide as a novel sorbent for preconcentration of chromium, copper, and zinc ions from water samples prior to energy dispersive X-ray fluorescence spectrometric determination

Pytlakowska, Katarzyna; Kozik, Violetta; Matussek, Marek; Pilch, M.; Hachuła, Barbara; Kocot, Karina

doi:10.1039/c6ra03662g

Cited by 37 publications

(14 citation statements)

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“…The improvement of their selectivity can be realized by application of surfactant [ 15 – 17 ], suitable chelating agent [ 18 , 19 ], or through chemical functionalization, e.g. via silanization [ 20 – 22 ] or creation of ester or amide bonds [ 23 , 24 ]. In case of Cr(VI), the amino-functionalized GO seems to be the appropriate adsorbent because the protonated amino groups provide a positive surface charge that is suitable for the adsorption of Cr(VI) anions [ 25 ].…”

Section: Introductionmentioning

confidence: 99%

Selective adsorption and determination of hexavalent chromium ions using graphene oxide modified with amino silanes

et al. 2018

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Novel adsorbents are described for the preconcentration of chromium(VI). Graphene oxide (GO) was modified with various amino silanes containing one, two, or three nitrogen atoms in the molecule. These include 3-aminopropyltriethoxysilane (APTES), N-(3-trimethoxysilylpropyl)ethylenediamine (TMSPEDA), and N1-(3-trimethoxysilylpropyl)diethylenetriamine (TMSPDETA). The resulting GO derivatives were characterized by scanning electron microscopy, X-ray photoelectron spectroscopy, and energy-dispersive X-ray fluorescence spectrometry (EDXRF). Adsorption studies show that these GO based sorbents are highly selective for Cr(VI) in the presence of Cr(III) at pH 3.5. Although the amino silanes applied in modification of GO contain different numbers of nitrogen atoms, the maximum adsorption capacities of GO derivatives are very similar (13.3–15.1 mg·g−1). Such results are in accordance with spectroscopy studies which show that the amount of amino silanes attached to GO decreases in the order of APTES > TMSPEDA > TMSPDETA. The APTES-modified GO was applied to selective and sensitive extraction of Cr(VI) ions prior to quantitation by low-power EDXRF using the Cr Kα line. The Cr(VI) ions need not be eluted from the solid adsorbent. The method has a 0.17 ng·mL−1 detection limit, and the recovery is 99.7 ± 2.2% at a spiking level of 10 ng·mL−1. The method was successfully applied to the determination of Cr(VI) in water samples. Graphical abstractGraphene oxide adsorbents modified with various amino silanes are described for the preconcentration and speciation of trace and ultratrace levels of chromium ions. Electronic supplementary materialThe online version of this article (10.1007/s00604-017-2640-2) contains supplementary material, which is available to authorized users.

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Section: Introductionmentioning

confidence: 99%

Selective adsorption and determination of hexavalent chromium ions using graphene oxide modified with amino silanes

et al. 2018

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“…In this way, the precision and sensitivity of XRF spectrometry are effectively improved. So far, the solid adsorbents used in the solid phase extraction preconcentration method mainly include activated carbon [14], carbon nanotube [15], graphene [16][17][18][19] and resin [20][21][22]. For activated carbon, carbon nanotube and graphene, in order to improve the adsorption capability for heavy metals, they usually need to be functionally modified by combining with some organic macromolecules before use.…”

Section: Introductionmentioning

confidence: 99%

Preconcentration with Chlorella vulgaris combined with energy dispersive X-ray fluorescence spectrometry for rapid determination of Cd in water

et al. 2020

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Freshwater green algae Chlorella vulgaris was selected as an adsorbent, and a simple, rapid, economical and environmentally friendly method for the detection of heavy metal Cd in water samples based on preconcentration with C. vulgaris combined with energy dispersive X-ray fluorescence (EDXRF) spectrometry was proposed. Chlorella vulgaris could directly and rapidly adsorb Cd 2+ without any pretreatment, and the maximum adsorption efficiency could be obtained when the contact time was 1 min with an optimal pH of 10. The obtained Cd-enriched thin samples after preconcentration with C. vulgaris by suction filtration of reaction solution had very good uniformity, which could be directly measured by EDXRF spectrometry, and the net integral fluorescence intensity of Cd K α characteristic peak had a very good linear relationship with the initial concentration of Cd in the range of 0.703–74.957 µg ml −1 with a correlation coefficient of 0.9979. When the Cd thin samples with a Cd-enriched region of 15.1 mm in diameter were formed by the developed preconcentration method with suction filtration of 10 ml reaction solution, the detection limit of this method was 0.0654 µg ml −1 , which was lower than the maximum allowable discharge concentration of Cd in various industrial wastewaters. The proposed method was simple to operate, and could effectively remove the influence of matrix effect of water samples and effectively improve the sensitivity and stability of EDXRF spectrometry directly detecting heavy metals in water samples, which was successfully applied to detect Cd in real water samples with satisfactory results, and the recoveries ranged from 94.80% to 116.94%. Moreover, this method can be applied to the rapid detection and early warning of excessive Cd in discharged industrial wastewaters. This work will provide a methodological basis for the development of rapid and online monitoring technology and instrument of heavy metal pollutants in water.

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“…Thus, TXRF is a suitable method for determining uranium in liquid samples by using U L X‐ray lines when uranium is separated from rubidium. Recently, graphene‐based materials, which are new carbon‐based materials that are of interest in separation science, are used in solid phase extraction to measure trace metal ions . Graphene has extraordinary properties, including nanosize, high surface area, thermal and chemical stability, and excellent adsorption affinity to metal ions.…”

Section: Introductionmentioning

confidence: 99%

Trace determination of uranium preconcentrated using graphene oxide by total reflection X‐ray fluorescence spectrometry

Takahashi¹,

Izumoto

Matsuyama

et al. 2019

X-Ray Spectrometry

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A new method based on dispersive microsolid phase extraction using graphene oxide (GO) as a solid adsorbent and total reflection X‐ray fluorescence (TXRF) spectrometry is proposed for trace determination of uranium. In the developed methodology, a suspension of GO was injected into uranium‐spiked multielement solutions including rubidium; after filtration, the membrane filter with collected GO was placed in a small volume of internal standard acid solution and the eluent containing uranium was deposited onto a fluorine resin‐coated slide glass, which is a disposable sample stage. Using GO was effective for removal of rubidium from the measurement solution to avoid interference between Rb Kα peak and U Lα peak. The high enrichment factor of 150 enables obtaining uranium detection limits of 0.042, 0.087, and 0.12 μg L−1 for ionic strength of 0.01, 0.1, and 1 mol L−1, respectively. Such low detection limits were obtained by using a benchtop TXRF spectrometer with 5‐min measurement. The proposed method is suitable for trace uranium determination in water, including high salinity samples.

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Glycine modified graphene oxide as a novel sorbent for preconcentration of chromium, copper, and zinc ions from water samples prior to energy dispersive X-ray fluorescence spectrometric determination

Abstract: A novel and selective sorbent for micro-solid phase extraction was synthesized by chemical functionalization of graphene oxide with glycine.

Cited by 37 publications

References 48 publications

Selective adsorption and determination of hexavalent chromium ions using graphene oxide modified with amino silanes

Selective adsorption and determination of hexavalent chromium ions using graphene oxide modified with amino silanes

Preconcentration with Chlorella vulgaris combined with energy dispersive X-ray fluorescence spectrometry for rapid determination of Cd in water

Trace determination of uranium preconcentrated using graphene oxide by total reflection X‐ray fluorescence spectrometry

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