Results 11 to 20 of about 814,146 (346)

Interannual variation of reactive nitrogen emissions and their impacts on PM2.5 air pollution in China during 2005–2015

open access: yesEnvironmental Research Letters, 2021
Emissions of reactive nitrogen as ammonia (NH _3 ) and nitrogen oxides (NO _x ), together with sulfur dioxide (SO _2 ), contribute to formation of secondary PM _2.5 in the atmosphere. Satellite observations of atmospheric NH _3 , NO _2 , and SO _2 levels
Youfan Chen   +10 more
doaj   +1 more source

Radical Chemistry in a Femtosecond Laser Plasma: Photochemical Reduction of Ag+ in Liquid Ammonia Solution [PDF]

open access: yes, 2018
Plasmas with dense concentrations of reactive species such as hydrated electrons and hydroxyl radicals are generated from focusing intense femtosecond laser pulses into aqueous media. These radical species can reduce metal ions such as Au3+ to form metal
Ahsan, Syeda   +4 more
core   +3 more sources

Determination of Trace Silver in Geological Samples by Inductively Coupled Plasma-Mass Spectrometry with Acid Decomposition and Internal Standard Calibration

open access: yesYankuang ceshi, 2021
BACKGROUND Inductively coupled plasma-mass spectrometry (ICP-MS) is used for the determination of trace silver in geological samples. Hydroxides and oxides of Zr, Nb, Mo cause serious overlapping interference on the two mass numbers of 107Ag and 109Ag ...
LIU Hai-ming, WU Ming-li, CHENG Jing-te
doaj   +1 more source

Experimental study on nitrification in a submerged aerated biofilter [PDF]

open access: yes, 2004
The aim of the present work was to evaluate the performance of a semi-pilot scale BAF in order to obtain a highly polished effluent in terms of removal of organic matter, suspended solids and ammonia and to observe the influence of temperature, pH and ...
Chiavola, Agostina   +3 more
core   +2 more sources

Removal of ammonia from anaerobic co-digestion effluent of organic fraction of food waste and domestic wastewater using air stripping process

open access: yesVietnam Journal of Science, Technology and Engineering, 2022
In this study, a continuous ammonium stripping lab-scale model of anaerobic co-digestion effluent from an organic fraction of food waste and domestic wastewater was used to investigate ammonium removal efficiency by air stripping.
Lan Huong Nguyen   +2 more
doaj   +1 more source

Electrochemical Ammonia Synthesis and Ammonia Fuel Cells

open access: yesAdvanced Materials, 2018
AbstractAmmonia is a promising platform molecule for the future renewable energy infrastructure owing to its high energy density (when liquefied) and carbon‐free nature. In particular, the interconversion between the chemical and electrical energies leveraging the nitrogen cycle could be an effective approach in mitigating the intermittency of ...
Feng Jiao, Bingjun Xu
openaire   +3 more sources

Recent progress towards the electrosynthesis of ammonia from sustainable resources [PDF]

open access: yes, 2017
Ammonia (NH3) is a key commodity chemical of vital importance for fertilisers. It is made on an industrial scale via the Haber Bosch process, which requires significant infrastructure to be in place such that ammonia is generally made in large ...
Shipman, Michael A., Symes, Mark D.
core   +1 more source

Direct Numerical Simulation of a Reacting Turbulent Hydrogen/Ammonia/Nitrogen Jet in an Air Crossflow at 5 Bar

open access: yesEnergies, 2023
The article aims to analyze the fluid dynamics and combustion characteristics of a non-premixed flame burning a fuel mixture derived from ammonia partial decomposition injected in an air crossflow.
Eugenio Giacomazzi   +3 more
doaj   +1 more source

Influence of Structural Parameters of Tesla Valve Flow Field on Performance of Fuel Cells

open access: yesEnergies
The optimization of flow channel structures significantly impacts the performance enhancement of proton exchange membrane fuel cells (PEMFCs). In this paper, the influences of the loop radius, inclination angle, and presence of the island in the Tesla ...
Hui Guo   +6 more
doaj   +1 more source

Selective low concentration ammonia sensing in a microfluidic lab-on-a-chip [PDF]

open access: yes, 2006
In the medical community, there is a considerable interest in a diagnostic breath analyzer for ammonia that is selectively enough to measure in exhaled air and small enough for the small volumes available in such an application.
Berg, Albert van den   +4 more
core   +3 more sources

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