Toward the use of surface modified activated carbon in speciation: Selective preconcentration of selenite and selenate in environmental waters

Tsoi, Yeuk-Ki; Leung, Kelvin Sze-Yin

doi:10.1016/j.chroma.2011.02.016

Cited by 21 publications

(13 citation statements)

References 32 publications

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“…As described previously, 1.0 mL of 0.2 mol/L NaOH was enough to elute the analyte from the coated material. Thus, an enrichment factor of 100 was obtained with 100 mL of sample solution, which is higher than that of Tsoi et al and Zheng et al .…”

Section: Resultsmentioning

confidence: 59%

Speciation of inorganic selenium in environmental water samples by inductively coupled plasma optical emission spectrometry after preconcentration by using a mesoporous zirconia coating on coal cinder

Wei

Guo

et al. 2014

J. Sep. Science

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A simple, novel, and selective flow-injection solid-phase extraction with inductively coupled plasma optical emission spectrometry method was developed for the speciation of inorganic selenium in environmental water samples. A mesoporous zirconia film was simply introduced to coat coal cinder by means of the sol-gel technique, and the adsorptive performance of the coated material for Se(IV)/Se(VI) was investigated in different media. Both Se(IV) and Se(VI) can be retained quantitatively by the material in HCl/NaOH (pH 1.0-9.0) media, while only Se(IV) was adsorbed quantitatively in sodium acetate buffer (pH 3.5-6.0). Thus, the assay of Se(VI) is based on subtracting Se(IV) from total selenium by controlling different adsorptive media without employing any redox procedure. Under the optimum conditions, the detection limit of Se(IV) is 9.0 ng/L with an enrichment factor of 100, and the relative standard deviation is 3.6% (n = 9, C = 5.0 ng/mL). The developed method was successfully applied to the speciation of inorganic selenium in environmental water samples with satisfactory results. In order to further verify the accuracy of the developed method, it was applied to analysis of total selenium in GSBZ 50031-94 certified reference environmental water, and the determined values coincided with the certified values very well.

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Section: Resultsmentioning

confidence: 59%

Speciation of inorganic selenium in environmental water samples by inductively coupled plasma optical emission spectrometry after preconcentration by using a mesoporous zirconia coating on coal cinder

Wei

Guo

et al. 2014

J. Sep. Science

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“…Unfortunately, this interference problem cannot be solved with correction equations included in the ICP-Journal Pre-proof J o u r n a l P r e -p r o o f MS software, as the correction factor was not specified by the U.S. EPA Method 200.8 (Ralston et al, 2008). Therefore, in the perspective to lower the sensitivity and increase the detection limits, the use of reaction or collision cells or dynamic collision cells was recommended (Plant et al, 2014;Tsoi and Leung, 2011;Wallschläger and London, 2004). ICP-MS with Collision/Reaction Cell (CRC) Technology decreases Se detection limits and permits the determination of Se using 80 Se and/or 78 Se, while avoiding polyatomic interferences from sample constituents or Argon from the plasma (Yu et al, 2019).…”

Section: Recommendations For Se Monitoring In Mine Industrymentioning

confidence: 99%

Monitoring and analysis of selenium as an emerging contaminant in mining industry: A critical review

Etteieb

Magdouli

Zolfaghari

et al. 2020

Science of The Total Environment

150

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This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.

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“…The determination of trace amounts of Se utilizes high sorption capacity of solid materials such as non-polar (C-18) sorbent [57], nano-Al 2 O 3 [58], modified activated carbon [59], cetyltrimethylammonium bromide (CTAB)-modified alkyl silica [60], Dowex 1X2 resin [61], dithiocarbamate loaded polyurethane foam [62], or dithizone sorbent [63]. Sitko et al proposed, the preconcentration of Se using multiwalled carbon nanotubes (MWCNTs) and APDC as a chelating agent in dispersive solid-phase microextraction (DSPME) [51].…”

Section: Before Spementioning

confidence: 99%

Sorption of Heavy Metal Ions of Chromium, Manganese, Selenium, Nickel, Cobalt, Iron from Aqueous Acidic Solutions in Batch and Dynamic Conditions on Natural and Synthetic Aluminosilicate Sorbents

et al. 2020

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Zeolites are materials with known sorption properties. The sorption is thought to progress mainly by ion exchange with Na+, K+, Mg2+, Ca2+ or H+ from the zeolite exchange sites. The aim of the study was to compare the sorption properties of natural and synthetic zeolites on the example of the removal of selected metals from aqueous acidic solutions. Uptake experiments for selected ions of chromium, manganese, selenium, nickel, cobalt, and iron were performed using the batch and kinetic column methods. The sorption of the individual metal ions in mg per 1g of sorbent was determined for each sorbent. The relative affinity sequence of the examined cations toward the various sorbent was presented. The Langmuir model was used to model the adsorption equilibrium. Vermiculite under 1 mm of diameter (SF), Na-X, and Na-A were proved to be the most suitable for the individual uptake of studied metal ions. It was observed that the behavior of selenium ions differed from the remaining ones which was interpreted that selenium undergoes adsorption in the anionic form. The fixed-bed column studies were performed using Na-A, ensuring the sorption of selenium in the presence of iron(III) ions. The experiments were conducted using Na-X zeolite pre-loaded by Fe(III) as well as unmodified sorbent eluted by an equimolar mixture containing 100 ppm of Fe and Se. Obtained results prove that selenium sorption improves if other metal ions such as iron appear in the acidic solution. That efficient selenium sorption conditions can be applied to remove selenium which was recognized as toxic at higher levels.

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Toward the use of surface modified activated carbon in speciation: Selective preconcentration of selenite and selenate in environmental waters

Cited by 21 publications

References 32 publications

Speciation of inorganic selenium in environmental water samples by inductively coupled plasma optical emission spectrometry after preconcentration by using a mesoporous zirconia coating on coal cinder

Speciation of inorganic selenium in environmental water samples by inductively coupled plasma optical emission spectrometry after preconcentration by using a mesoporous zirconia coating on coal cinder

Monitoring and analysis of selenium as an emerging contaminant in mining industry: A critical review

Sorption of Heavy Metal Ions of Chromium, Manganese, Selenium, Nickel, Cobalt, Iron from Aqueous Acidic Solutions in Batch and Dynamic Conditions on Natural and Synthetic Aluminosilicate Sorbents

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