...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...

... + and NH 4 + in a manner similar to trioctahedral vermiculites. * E-mail address 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...

... 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...

... ammonium from wastewater. Effect of various parameters . Surface Engineering and Applied Electrochemistry , 48 , 276 – 283 . Eurostat ( 2015 ) Environmental Data Centre on Waste. Municipal waste statistics. http://ec.europa.eu/eurostat/web/waste . Farmer V.C. & Mortland M.M...

..., whereas the element analyzer technique appeared to produce minor N fractionation arising from incomplete yields that were obtained. Ammonium concentrations in micas and feldspar have also been measured using IR spectroscopy, as demonstrated by Boyd (1997) and Busigny et al. (2004) . This method appears...

... (collected on the first multi-corer 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...

... System. © 2013 by the Mineralogical Society of America 2013 nitrogen isotope ammonium biogeochemical cycling biosphere extraterrestrial life metamorphism In this issue, Fogel and Steele ( 2013 ) provide an overview of the work on nitrogen in extraterrestrial materials that could...

...-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 are present as bioavailable forms of nitrogen in the oceanic reservoir (referred to as “fixed” nitrogen) and are linked...

... nitrogen reservoirs. © 2013 by the Mineralogical Society of America 2013 nitrogen speciation nitrogen cycling continental and oceanic crust ammonium fractionation factors mantle composition Nitrogen (N) is generally regarded as a volatile element with a behavior similar...

... recycling of surface sediments into the deep mantle. © 2013 by the Mineralogical Society of America 2013 nitrogen ammonium chemical geodynamics degassing recycling Owing to its strong triple covalent bond, atmospheric di-nitrogen (N 2 ) has often been described as an inert molecule...

... 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 (e.g. gypsum or phyllosilicate-bearing rock...

... population values even in calcareous bentonites (Dohrmann et al. , 2012a , b ): ammonium (method 1) and Cu(II)–triethylentetramin (methods 2 and 3). In this joint project, the ammonium chloride method was used in the Swedish laboratory, whereas the other methods were used in the German laboratory...