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ammonium

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Journal Article
Journal: Clay Minerals
Published: 02 July 2021
Clay Minerals (2021) 56 (2): 87–98.
... 31 08 2020 17 06 2021 Copyright © The Author(s), 2021. Published by Cambridge University Press on behalf of The Mineralogical Society of Great Britain and Ireland 2021 The Author(s) activation temperature interlayer spacing quaternary ammonium salt sericite mica silane...
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Journal Article
Journal: Geology
Published: 08 April 2021
Geology (2021) 49 (7): 822–826.
... nutrient recycling under anoxic conditions. Here, we show how hydrothermal fluids acted as a recycling mechanism for ammonium (NH 4 + ) in the Archean ocean. We present elemental and stable isotope data for carbon, nitrogen, and sulfur from shales and hydrothermally altered volcanic rocks from the 3.24 Ga...
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Journal Article
Published: 15 July 2020
Geochemistry: Exploration, Environment, Analysis (2020) 20 (4): 451–460.
...Keiko Hattori; Anna Fonseca; Tabetha Sheppard Abstract Rhyolitic rocks hosting the El Zapote epithermal Ag deposit are pervasively altered and contain ammonium ranging from 290 to 1750 ppm. High ammonium values are found in samples containing abundant fine-grained illite. This fine-grained illite...
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Journal Article
Published: 01 December 2018
Clays and Clay Minerals (2018) 66 (6): 485–492.
...Uri Shuali; Shlomo Nir Abstract The present report is a review of uses of quaternary ammonium cations (QACs) as free monomers or immobilized in micelle-clay complexes in bacteria removal from water. The removal of bacteria from water by filtration through a bed of a granulated QAC-clay micelle...
Journal Article
Journal: Clay Minerals
Published: 01 September 2018
Clay Minerals (2018) 53 (3): 487–496.
... drastically on zeolite. The cesium desorption from the layered minerals was promoted by the addition of ammonium ions, namely trioctylmethylammonium chloride and zephiramine. These ammonium ions desorb cesium from the interlayers of the minerals without destroying the mineral structure. The cesium desorption...
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Journal Article
Journal: Clay Minerals
Published: 01 June 2018
Clay Minerals (2018) 53 (2): 105–116.
...Blanca Bauluz; Fernando Nieto ABSTRACT The present study examines the micro- and nano-texture and composition of ammonium-bearing and potassium micas in very-low grade metamorphic black Silurian shales from the SE Iberian Range (NE Spain). Two organic-rich shales were studied by X-ray diffraction...
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Journal Article
Published: 01 February 2018
Clays and Clay Minerals (2018) 66 (1): 74–85.
... of corresponding author: michal.skiba@uj.edu.pl 16 05 2017 19 31 2017 Copyright © 2018, The Clay Minerals Society 2018 The Clay Minerals Society Ammonium Illite Dioctahedral Vermiculite Early Diagenetic Illitization NH + 4 -fixation, Soil Illitization Fixation of NH 4...
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Journal Article
Published: 01 December 2017
Clays and Clay Minerals (2017) 65 (6): 378–386.
... existed between bilayer and pseudo-trimolecular layer states from C 11 to C 14 . The ammonium groups had two locations: most ammonium groups were located over the six-member rings (~90%), and the rest above the substitution sites (~10%). The ammonium groups interacted with the vermiculite surface through...
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Journal Article
Published: 01 June 2017
Italian Journal of Geosciences (2017) 136 (2): 145–156.
... compounds in groundwater in the Sagittario River basin, central Italy. The detrimental effect of the groundwater ammonium on the meiofaunal organisms is also evaluated in the hyporheic zone, where N-NH 4 + concentrations reach a maximum value of 0.6 mg L −1 . The main source of the nitrogen contamination...
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Journal Article
Journal: Clay Minerals
Published: 01 March 2017
Clay Minerals (2017) 52 (1): 143–158.
... (>10 y) is identified by stabilized basic leachates (7.5 < pH < 9) ( Ghayaza et al. , 2011 ). Leachates are rich in cations, organic matter, inorganic salts, adsorbable halogenated organic compounds and heavy metals. Among the cations, ammonium (NH 4 + ), which is produced mainly by bacterial...
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Journal Article
Published: 01 January 2016
American Mineralogist (2016) 101 (1): 7–24.
... important pathways for N cycling in the solid Earth. * E-mail: geb0@lehigh.edu Manuscript handled by Paul Tomascak 23 3 2015 16 6 2015 © 2016 Mineralogical Society of America 2016 Nitrogen cycling nitrogen isotopes ammonium microporous silicate isotope fractionation...
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Journal Article
Journal: Elements
Published: 01 December 2015
Elements (2015) 11 (6): 395–401.
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Journal Article
Published: 01 July 2014
Journal of Foraminiferal Research (2014) 44 (3): 281–299.
... deployment) was used for oxygen microprofiles. A third core was assessed for pore-water extraction (e.g., nitrate, ammonium) and solid phase treatment, and the last core from each station was processed for foraminiferal investigation. Bottom seawater was collected in Niskin bottles installed on a rosette...
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Journal Article
Published: 01 January 2014
Reviews in Mineralogy and Geochemistry (2014) 78 (1): 399–446.
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Journal Article
Journal: Elements
Published: 01 October 2013
Elements (2013) 9 (5): 333–338.
... System. © 2013 by the Mineralogical Society of America 2013 nitrogen isotope ammonium biogeochemical cycling biosphere extraterrestrial life metamorphism Aquamarine (beryl) and muscovite crystals; these minerals store organic-sourced nitrogen as molecular nitrogen and ammonium...
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Journal Article
Journal: Elements
Published: 01 October 2013
Elements (2013) 9 (5): 345–351.
... and iron, can be a biolimiting nutrient in the environment. On the modern Earth, nitrogen is present in the atmospheric reservoir as di-nitrogen (N 2 ) and is by far the most abundant gas in the atmosphere. Nitrite (NO 2 − ), nitrate (NO 3 − ), ammonium (NH 4 + ), and particulate and dissolved organic...
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Journal Article
Journal: Elements
Published: 01 October 2013
Elements (2013) 9 (5): 353–358.
... nitrogen reservoirs. © 2013 by the Mineralogical Society of America 2013 nitrogen speciation nitrogen cycling continental and oceanic crust ammonium fractionation factors mantle composition Ammonium-bearing micas in metasedimentary rock Nitrogen (N) is generally regarded...
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Journal Article
Journal: Elements
Published: 01 October 2013
Elements (2013) 9 (5): 359–366.
... recycling of surface sediments into the deep mantle. © 2013 by the Mineralogical Society of America 2013 nitrogen ammonium chemical geodynamics degassing recycling Nitrogen is the main diamond impurity. Studying diamond gives access to deep mantle nitrogen (150 to > 800 km). I mage : F...
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Journal Article
Journal: Elements
Published: 01 October 2013
Elements (2013) 9 (5): 367–372.
... eventually be lost to space. For Mars, this picture would change if the surface were wet because nitrate and ammonium could then leach into deeper strata and sediments and avoid destruction by UV processes. In this case, we would expect that N concentrations and isotopic compositions be related to rock type...
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Journal Article
Journal: Clay Minerals
Published: 01 May 2013
Clay Minerals (2013) 48 (2): 215–233.
... atmosphere. Accordingly no glove box was used in the laboratory, and possible exchangeable Fe(II) could not be determined. CEC; exchangeable cation population; bentonite buffer; Cu-trien 5 × calcite ethanolic ammonium chloride solution alteration. URL Bentonites are candidate materials...
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