Results 81 to 90 of about 152,103 (369)

Precipitation of niobic acid from potassium niobate in sulphuric acid solution: A route to niobium oxide

The Canadian Journal of Chemical Engineering, EarlyView.
Graphical abstract illustrating the niobic acid precipitation process applied and the product obtained. Abstract This study investigates the precipitation of niobic acid (Nb2O5.nH2O) from potassium niobate solution with addition of sulphuric acid, and its subsequent thermal conversion into niobium oxide (Nb2O5). Thermodynamic modelling with PHREEQC and
Cássia R. Souza, Gabriela C. Silva, Isabel P. Silva, Frederico M. Penha, Sônia D. F. Rocha   +4 more
wiley   +1 more source

Virtual Sensing of Nitrite: A Novel Control for Safe Denitrification in Recirculating Aquaculture Systems (RASs)

Fishes
Recirculating aquaculture system (RAS) technology is seen worldwide as a solution for sustainable fish production. However, there are still deficiencies in the process technology imperiling consistent operation and thus economic results.
Anneliese Ernst, Christian Steinbach, Kai Wagner, Uwe Waller   +3 more
doaj   +1 more source

Increased Denitrification Rates Associated with Shifts in Prokaryotic Community Composition Caused by Varying Hydrologic Connectivity

Frontiers in Microbiology, 2017
While modern developments in agriculture have allowed for increases in crop yields and rapid human population growth, they have also drastically altered biogeochemical cycles, including the biotransformation of nitrogen.
Abigail Tomasek, Abigail Tomasek, Christopher Staley, Ping Wang, Thomas Kaiser, Nicole Lurndahl, Jessica L. Kozarek, Miki Hondzo, Miki Hondzo, Michael J. Sadowsky, Michael J. Sadowsky   +10 more
doaj   +1 more source

A model of nitrous oxide evolution from soil driven by rainfall events: 1. Model structure and sensitivity [PDF]

, 1992
This paper describes a rain-event driven, process-oriented simulation model, DNDC, for the evolution of nitrous oxide (N2O), carbon dioxide (CO2), and dinitrogen (N2) from agricultural soils.
Frolking, Steve, Frolking, Tod A, Li, Changsheng   +2 more
core   +2 more sources

MESMO global model output for glacial simulations with dynamic C:N:P ratios [PDF]

, 2020
Dataset: MESMO glacial CNPModel outputs archived have a complete suite of biogeochemical state variables in the 3D global ocean domain. They include temperature, salinity, nutrients (PO4, NO3, Fe, Si), carbon pools and their isotopes (DIC, DOC, POC, 13C ...
Matsumoto, Katsumi
core   +1 more source

Effects of Drying-Rewetting Cycles on Ferrous Iron-Involved Denitrification in Paddy Soils [PDF]

, 2021
Yu-shuai Zhang, Baokun Xu, Jiangpei Han, Liangsheng Shi   +3 more
openalex   +1 more source

Global patterns of marine nitrogen fixation and denitrification

Oceanographic Literature Review, 1997
A new quasi‐conservative tracer N*, defined as a linear combination of nitrate and phosphate, is proposed to investigate the distribution of nitrogen fixation and denitrification in the world oceans. Spatial patterns of N* are determined in the different
N. Gruber, J. Sarmiento
semanticscholar   +1 more source

Evaluation of ammonium removal from sludge return liquor using a pilot‐scale microbial electrolysis cell

Journal of Chemical Technology &Biotechnology, EarlyView.
Abstract BACKGROUND Microbial electrochemical technologies (METs) enable separation of ammonium from nutrient‐rich waste streams, such as sludge return liquors, using bioanodes that consume organic matter to generate electrical current. Quantification of ammonia recovery performance in pilot scale METs treating real wastes under industrially relevant ...
Samuel David Settle, Richard Law, Elizabeth Susan Heidrich   +2 more
wiley   +1 more source

The nitrogen removal characterization and ecological risk assessment of Bacillus sp. isolated from mariculture systems in China with spatiotemporal difference.

PLoS ONE
The accumulation of nitrogen compounds may worsen the aquatic environment and cause serious economic losses in the aquaculture industry. In this study, the denitrification performance and ecological safety of 120 Bacillus sp.
Qian Zhang, Yingeng Wang, Zheng Zhang, Yongxiang Yu, Chunyuan Wang, Meijie Liao, Xiaojun Rong, Zhiqi Zhang, Bin Li, Jianlong Ge, Jinjin Wang   +10 more
doaj   +1 more source

Intermittent flooding of organic‐rich soil promotes the formation of denitrification hot moments and hot spots

Ecosphere, 2019
Anthropogenic activities have altered the nitrogen cycle, necessitating management on the landscape level. Isolated time periods and areas, termed hot moments and hot spots, respectively, frequently account for a large percentage of nitrate removal in ...
Abigail A. Tomasek, Miki Hondzo, Jessica L. Kozarek, Christopher Staley, Ping Wang, Nicole Lurndahl, Michael J. Sadowsky   +6 more
doaj   +1 more source