Handbook of ion exchange resins: their application to inorganic analytical chemistry

Korkisch, J.; Worsfold, Paul J.

doi:10.1016/s0003-2670(00)83364-4

Cited by 126 publications

(139 citation statements)

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“…Because the diameter of the column is around 10 times larger than that of the adsorbent particles, the wall effect is negligible (Korkisch, 1989). To one end of the bed, a small wooden glass was inserted, an aliquot of the fresh adsorbent was put into the bed.…”

Section: Experimental Partmentioning

confidence: 99%

Adsorption of Nickel (II) Ions From Aqueous Solutions Using Alumina

Dimitrovski

Bozinovski²,

Lisickov

et al. 2011

QOL

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Abstract:The paper presents the results achieved during the process of nickel removal from aqueous solutions by adsorption on alumina (Aluminum oxide) in continuous conditions. The continuing experiments were conducted in a glass column with diameter of 16 mm and fi xed bed of adsorbent with quantity ranging from 30 to 115 g, adsorbent grains size from 1.0 to 2.0 mm, and retention time of 0.5 to 12 minutes. The quantity of nickel in the aqueous solutions was changed within the range of 0.045 up to 0.12 mg/l Ni. The analysis of the obtained experimental data defi ned the mutual affection of the retention time, the initial nickel concentration in the water, and the adsorbent quantity, i.e. the content of the adsorbent in the treated solution to the adsorbent capacity.According to the achieved results, logarithmic mathematical model showed best correlation between experimental and calculated values, also maximum nickel ions adsorption uptake onto the alumina were determined as 400 mg/g.

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Section: Experimental Partmentioning

confidence: 99%

Adsorption of Nickel (II) Ions From Aqueous Solutions Using Alumina

Dimitrovski

Bozinovski²,

Lisickov

et al. 2011

QOL

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“…It is mainly the strongly basic anion exchangers that have acquired particular importance for the removal of mercury, which in chloride-containing solutions is present in the form of complex chloromercurate ions, i.e. HgCl 3-and HgCl 4 2- [19]. Ion exchangers are capable of absorbing not only dissolved substances but also gases.…”

Section: Introductionmentioning

confidence: 99%

Oxidised mercury determination from combustion gases using an ionic exchanger

Fuente-Cuesta¹,

Dı́az-Somoano²,

López-Antón³

et al. 2014

Fuel

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Mercury displays a different reactivity and behaviour depending on its speciation.Determination of the mercury species present in combustion flue gases is important for proposing effective control technologies. The Ontario Hydro (OH) method is accepted as the only wet-chemical method suitable for measuring total and speciated mercury in flue gases. However, the continuous development of combustion technologies has the effect of modifying the operational variables and the composition of the resulting flue gases, leading to measurement biases in mercury determination. In this work, an alternative method based on the use of an ionic exchanger resin is proposed for the determination of gaseous oxidised mercury. The results show that for sampling flue gases containing reactive gases over long periods of time, the use of this resin is a suitable method for determining gaseous elemental and oxidized mercury, even in the presence of large amounts SO 2 or NO 2 . Application of the OH method when elevated amounts of SO 2 or NO 2 are present in the gas composition leads to an overestimation of the amount of oxidised mercury due to the oxidation of the mercury in the KCl impinger solution.

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“…Gas chromatography [19][20][21] 17,26,27 Thiourea, L-cysteine, SnCl 2 and NaBH 4 can be used for elution of Hg from the resin. 16,17,27 In this work we propose a new approach to speciation of Hg inorg and Hg org , using a sequential and selective retention of chlorocomplexes of Hg inorg by anion-exchange resin and amalgamation of Hg org . NaBH 4 is used to remove the Hg from the anion-exchange resin (in a column), while the amalgamated Hg org (in an Au/Pt gauze) is removed by heating.…”

Section: Introductionmentioning

confidence: 99%

“…17,18,[25][26][27] Stable complexes of Hg are produced by reaction of Hg inorg with anions, such as SCN -, CH 3 COO -, I -, Br -and Cl -. The anionic complexes of Hg produced are strongly held by anion exchange resin, while Hg org species typically produce neutral compounds in the presence of these anions and are not retained.…”

Section: Introductionmentioning

confidence: 99%

Mercury speciation in urban landfill leachate by cold vapor generation atomic absorption spectrometry using ion exchange and amalgamation

Flores¹,

Paniz²,

Flores³

et al. 2009

J. Braz. Chem. Soc.

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Foi desenvolvido um sistema em linha para a especiação de Hg orgânico (Hg org ) e Hg inorgânico (Hg inorg ) em chorume. Clorocomplexos produzidos a partir do Hg inorg são separados em uma coluna trocadora de ânions. O Hg retido na coluna é eluído com NaBH 4 na presença de HCl. O Hg 0 produzido é medido por espectrometria de absorção atômica com geração de vapor frio (CV AAS). O Hg org , que não fica retido na coluna, é misturado com NaBH 4 produzindo espécies voláteis de Hg, as quais são amalgamadas numa rede de Au/Pt. O Hg é removido desta coluna por aquecimento a 600 °C e medido por CV AAS. Para a especiação de Hg inorg e Hg org em chorume, as amostras são centrifugadas, filtradas e tratadas com HCl. Os limites de detecção (3 s) são 9 e 12 ng L -1 de Hg para Hg inorg e Hg org , respectivamente. A freqüência de análise é 22 h -1 .This work deals with on line speciation of organic Hg (Hg org ) and inorganic Hg (Hg inorg ) in urban landfill leachate. Chlorocomplexes of Hg inorg are produced in HCl medium and retained on an anion exchange column. The retained Hg is eluted with NaBH 4 in presence of HCl. Hg 0 is produced and then measured by cold vapor atomic absorption spectrometry (CV AAS). Hg org does not interact with the resin and is mixed with NaBH 4 at the exit of the column producing volatile species of Hg that are then amalgamated by a gauze of Au/Pt. Mercury is removed from the gauze by heating to 600 °C and subsequently measured by CV AAS. For Hg inorg and Hg org speciation in urban landfill leachate, the samples are centrifuged, filtered and treated with HCl. The detection limits (3 s) of Hg inorg and Hg org are 9 and 12 ng L -1 of Hg, respectively. The analysis frequency is 22 h -1 .Keywords: mercury speciation, landfill leachate; flow analysis, ion exchange, amalgamation, CVG AAS IntroductionIn several countries, the urban waste is usually discarded in landfills, producing toxic leachate and toxic gases. The rainwater percolation through the residues and its inherent aqueous fraction comprise the leachate, which is characterized by high concentration of organic matter, salts, suspended particles and toxic elements. 1,2 Mercury is one of the elements often present in landfill leachate and become an environmental problem. 3 Inorganic Hg (Hg inorg ), mainly as Hg 0 and Hg 2+ , is generally disposed in urban landfills, 4 where it can associate to colloidal particles, complex with organic matter and/or bind to sulfides. 5 Under anaerobic conditions a significant fraction of Hg is transformed into more toxic species. Inorganic mercury may be transformed to other toxic species in landfill, such as methyl mercury, ethyl mercury and phenyl mercury. 6 However, the concentrations of ethyl mercury and phenyl mercury are very low and usually not detected by conventional techniques. Despite the possibility of formation of many organic and inorganic compounds of Hg in the environment, methyl mercury is usually the most abundant Hg org species found in environmental samples, [7][8][9] whereas Hg 2+ is the main Hg ino...

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Handbook of ion exchange resins: their application to inorganic analytical chemistry

Cited by 126 publications

References 0 publications

Adsorption of Nickel (II) Ions From Aqueous Solutions Using Alumina

Adsorption of Nickel (II) Ions From Aqueous Solutions Using Alumina

Oxidised mercury determination from combustion gases using an ionic exchanger

Mercury speciation in urban landfill leachate by cold vapor generation atomic absorption spectrometry using ion exchange and amalgamation

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