...R. A. P. Thomas; M. J. Riding; J. D. F. Robinson; S. J. A. Brown; C. Taylor Abstract Ammonium is a common contaminant found in the soils and groundwater at former gasworks, associated with historical gas production and the storage and disposal of by-product. However, it can also be present...

...). The samples were degassed at 70°C for 12 h prior to analysis. 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...

... 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...

...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...

...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...

... 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...

...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...

... to trioctahedral vermiculites. Ammonium Illite Dioctahedral Vermiculite Early Diagenetic Illitization NH + 4 -fixation, Soil Illitization Fixation of NH 4 + by soil materials is a well-known phenomenon ( e.g. Douglas, 1989 and cited literature; Nieder et al., 2011 and cited...

... 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...

... 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...

...) 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 degradation...

... 2000 ; results for buddingtonite in Bebout and Sadofsky 2004 ). * E-mail: geb0@lehigh.edu Manuscript handled by Paul Tomascak Nitrogen cycling nitrogen isotopes ammonium microporous silicate isotope fractionation layer silicates cordierite Review article Invited Centennial...

... 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. Total nitrogen, total carbon, and organic-carbon concentrations (TN, TC and OC, respectively) were...

... 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...

... 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...

... 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...

... 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...

... forms in the near surface. A soil devoid of life would interact with ultraviolet light to produce N 2 gas, which would 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...