Results 21 to 30 of about 77,524 (304)

Physico-chemical technologies for nitrogen removal from wastewaters: a review

open access: yesRevista Ambiente & Água, 2015
The paper examines the main physico-chemical processes for nitrogen removal from wastewaters, considering both those that have been long known and still widely applied at the industrial scale, and those that are still at the research level.
Andrea G. Capodaglio   +2 more
doaj   +1 more source

Study on NO formation characteristics and ammonia-nitrogen conversion behavior during ammonia-coal co-firing

open access: yes能源环境保护, 2023
Experiments were conducted on a laboratory drop tube furnace for the single-firing of ammonia and coal, as well as co-firing, combined with numerical simulations to investigate the NO formation characteristics, intermediate reaction processes and ammonia-
WANG Huakun   +4 more
doaj   +1 more source

Long-Term Effects of Trace NO2 Addition on the Performance of CANON SBR [PDF]

open access: yesE3S Web of Conferences, 2021
Two parallel CANON Sequencing Bach reactors were started, and 67ppm NO2 was added into Sequencing Bach Reactor 2 while nothing was added to Sequencing Bach Reactor 1.
Qing Cai, Jiajia Ding
doaj   +1 more source

Photoinhibition of comammox reaction in Nitrospira inopinata in a dose- and wavelength-dependent manner

open access: yesFrontiers in Microbiology, 2022
Apparent contribution of complete ammonia-oxidizing organisms (comammox) to the global nitrogen cycle highlights the necessity for understanding niche differentiation of comammox bacteria among other ammonia oxidizers. While the high affinity for ammonia
Ekaterina Y. Gottshall   +5 more
doaj   +1 more source

Oxidation of Ammonia with Molecular Complexes

open access: yesJournal of the American Chemical Society, 2020
Oxidation of ammonia by molecular complexes is a burgeoning area of research, with critical scientific challenges that must be addressed. A fundamental understanding of individual reaction steps is needed, particularly for cleavage of N-H bonds and formation of N-N bonds.
Peter L. Dunn   +4 more
openaire   +3 more sources

Situation and prospects of treatment technologies for mine water containing ammonia nitrogen

open access: yes能源环境保护, 2023
As the discharge standards for mine water treatment become more stringent, the requirements for effective removal of ammonia nitrogen from mine water are strongly needed.
LI Fuqin*   +4 more
doaj   +1 more source

Ammonia-oxidizing archaea have more important role than ammonia-oxidizing bacteria in ammonia oxidation of strongly acidic soils [PDF]

open access: yesThe ISME Journal, 2011
Abstract Increasing evidence demonstrated the involvement of ammonia-oxidizing archaea (AOA) in the global nitrogen cycle, but the relative contributions of AOA and ammonia-oxidizing bacteria (AOB) to ammonia oxidation are still in debate. Previous studies suggest that AOA would be more adapted to ammonia-limited oligotrophic conditions,
Li-Mei, Zhang   +3 more
openaire   +2 more sources

Electrocatalytic Ammonia Oxidation by a Low Coordinate Copper Complex

open access: yes, 2022
Molecular catalysts for ammonia oxidation to dinitrogen represent enabling components to utilize ammonia as a fuel and/or source of hydrogen. Ammonia oxidation requires not only the breaking of multiple strong N-H bonds, but also controlled N-N bond ...
Mahdi, Raghibi Boroujeni   +6 more
core   +1 more source

DNA- and RNA-SIP Reveal Nitrospira spp. as Key Drivers of Nitrification in Groundwater-Fed Biofilters

open access: yesmBio, 2019
Nitrification, the oxidative process converting ammonia to nitrite and nitrate, is driven by microbes and plays a central role in the global nitrogen cycle.
Arda Gülay   +7 more
doaj   +1 more source

Manganese-Catalyzed Ammonia Oxidation into Dinitrogen

open access: yes, 2020
Base metal-catalyzed oxidative conversion of ammonia into dinitrogen is a promising process to utilize ammonia as an energy carrier. In this study, we report the manganese-catalyzed ammonia oxidation under chemical and electrochemical conditions ...
Ken, Sakata   +3 more
core   +1 more source

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