Pyrohydrolysis for the rapid determination of chlorine traces in silicate and non-silicate minerals and rocks

Farzaneh, Abbas; Troll, Georg

doi:10.1007/bf00493699

Cited by 13 publications

(2 citation statements)

References 9 publications

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“…The acid digestion left a residue of fine-grained quartz (and minor feldspar) fragments. The concentration of Cl was also determined on this digest after Hg(SCN)2 had been added to form HgCl2 and release SCN, which was then measured as the red Fe(SCN)3 complex by UV/VIS spectrometry (17).…”

Section: Methodsmentioning

confidence: 99%

Trace Metal Adsorption onto an Acid Mine Drainage Iron(III) Oxy Hydroxy Sulfate

Webster

Swedlund

Webster

1998

Environ. Sci. Technol.

309

149

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The adsorption properties of Fe-rich precipitates in acid mine drainage (AMD) systems differ from those of pure hydrous iron(III) oxides, and this can lead to inaccurate predictions of trace metal adsorption and attenuation. Adsorption edges for Cu, Pb, Zn and Cd adsorption onto a poorly ordered, goethite-bearing iron(III) oxy hydroxy sulfate, precipitated in an AMD system in New Zealand, have been compared to those for adsorption onto synthetic schwertmannite and two-line ferrihydrite. Adsorption of Cu and Zn onto the AMD iron(III) oxy hydroxy sulfate was greater than onto synthetic schwertmannite, which was in turn greater than onto two-line ferrihydrite. The two factors considered most likely to enhance Cu and Zn adsorption on the AMD iron(III) oxy hydroxy sulfate were (i) the formation of ternary complexes between the oxide surface, adsorbed SO 4 and the metal ion and (ii) bacterially mediated formation of the AMD precipitate. Cd adsorption was similarly enhanced on AMD iron(III) oxy hydroxy sulfate but unaffected by SO 4 , which did not adsorb at the relatively high pH conditions required for Cd adsorption. Although Pb did appear to form ternary complexes with SO 4 , Pb adsorption onto both AMD iron(III) oxy hydroxy sulfate and synthetic schwertmannite was less than adsorption onto two-line ferrihydrite.

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Section: Methodsmentioning

confidence: 99%

Trace Metal Adsorption onto an Acid Mine Drainage Iron(III) Oxy Hydroxy Sulfate

Webster

Swedlund

Webster

1998

Environ. Sci. Technol.

309

149

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“…Pyrohydrolysis [6][7][8][9][10] has been used for the determination of Cl and other halogens in rocks. The technique is fast and simple.…”

Section: Introductionmentioning

confidence: 99%

Determination of 36Cl in biological shield concrete using pyrohydrolysis and liquid scintillation counting

Itoh

Watanabe

Hatakeyama

et al. 2002

Analyst

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A method for the determination of 36Cl in biological shield concrete of nuclear reactors was developed. Cl in the concrete sample was extracted quantitatively by pyrohydrolysis at 900 degrees C and recovered in Na2CO3 solution for subsequent measurement of 36Cl by liquid scintillation counting. WO3 was used as an accelerator in the pyrohydrolysis. The Cl extraction procedure was optimized by investigating experimental conditions with the use of ion chromatography and its recovery was evaluated by the analysis of the geochemical reference samples. The detection limit of 36Cl was 0.02 Bq g(-1) for a sample weight of 2 g. The relative standard deviation was 3-7% for the samples containing 0.5 Bq g(-1) levels of 36Cl. The method was applied to determine 36Cl in biological shield concrete of the Japan Power Demonstration Reactor.

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Ion-selective electrodes

Potts

1987

A Handbook of Silicate Rock Analysis

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Pyrohydrolysis for the rapid determination of chlorine traces in silicate and non-silicate minerals and rocks

Cited by 13 publications

References 9 publications

Trace Metal Adsorption onto an Acid Mine Drainage Iron(III) Oxy Hydroxy Sulfate

Trace Metal Adsorption onto an Acid Mine Drainage Iron(III) Oxy Hydroxy Sulfate

Determination of 36Cl in biological shield concrete using pyrohydrolysis and liquid scintillation counting

Ion-selective electrodes

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