Results 61 to 70 of about 54,041 (296)

Redefining the Nitrogen Cycle Through Electronic Configuration Driven Electrocatalysis for Low Carbon Energy

Carbon Energy, EarlyView.
This review reveals how electronic configuration engineering governs the entire electrocatalytic nitrogen cycle, providing structure‐informed insights into reaction selectivity, catalytic durability, and sustainable nitrogen utilization across energy and environmental systems. ABSTRACT The global nitrogen cycle is essential to food production, chemical
Jiamu Feng, Linai Zhou, Mincan Yang, Aoxiang Zhu, Zengfeng Wei, Weilin Xu, Jia Li, Jun Wan   +7 more
wiley   +1 more source

Study on nitrogen removal in mixotrophic denitrification system driven by composite filter materials

Gongye shui chuli
NH4+-N in refinery wastewater is completely converted into NO3--N after biochemical treatment, resulting in extremely low C/N ratio in the effluent. The traditional heterotrophic denitrification processes require external carbon sources, which leads to ...
CHENG Binbin, SONG Yanke, WANG Qinghong, SONG Haigang, CHEN Chunmao, LI Jin, LIU Zhichang   +6 more
doaj   +1 more source

Rates and Pathways of N2 Production in a Persistently Anoxic Fjord: Saanich Inlet, British Columbia

Frontiers in Marine Science, 2019
Marine oxygen minimum zones (OMZs) support 30–50% of global fixed-nitrogen (N) loss but comprise only 7% of total ocean volume. This N-loss is driven by canonical denitrification and anaerobic ammonium oxidation (anammox), and the distribution and ...
Céline C. Michiels, Céline C. Michiels, Julia A. Huggins, Julia A. Huggins, Karina E. Giesbrecht, Jenifer S. Spence, Jenifer S. Spence, Rachel L. Simister, Rachel L. Simister, Diana E. Varela, Steven J. Hallam, Steven J. Hallam, Steven J. Hallam, Steven J. Hallam, Steven J. Hallam, Sean A. Crowe, Sean A. Crowe, Sean A. Crowe   +17 more
doaj   +1 more source

Design of a Novel CeW/Fe‐TiO2 Catalyst With High Oxygen Vacancy for Enhancing the Reactivity and SO2 Resistance in Low‐Temperature NH3‐SCR Reaction

EcoEnergy, EarlyView.
Fe3+ was introduced into the TiO2 lattice using the hydrothermal method, and low‐valent cations replaced part of Ti4+ to generate oxygen vacancies within the Fe‐Ov‐Ti unit, resulting in CeW/Fe‐TiO2 catalysts with oxygen‐deficient structures. Compared with CeW/TiO2 catalyst, the increase in oxygen vacancy content significantly improved the catalytic ...
Yuhang Wang, Xiaosheng Huang, Guodong Zhang, Haitao Zhang, Yongjie Xi, Zhicheng Tang   +5 more
wiley   +1 more source

Recent Advances of Perovskite Oxides for Air Pollution Control Chemistry: The Closed Loop From Design to Application

EcoEnergy, EarlyView.
This review summarizes a descriptor‐guided framework for linking theoretical calculations, in situ/operando characterization, synthesis regulation, and application screening in functional materials. Emphasis is placed on dynamic structure–property relationships that enable low‐cost material design with enhanced activity, stability, and environmental ...
Yanyu Jin, Zezheng Tang, Hengfan Wu, Xing Yuan, Zongxiang Yang, Weijia An, Wenquan Cui, Xianguang Meng, Ying Xu, Junhua Li   +9 more
wiley   +1 more source

Chemical observations of a polar vortex intrusion [PDF]

, 2006
An intrusion of vortex edge air into the interior of the Arctic polar vortex was observed on the 31 January 2005 flight of the NASA DC-8 aircraft. This intrusion was identified as anomalously high values of ozone by Airborne Raman Ozone, Temperature, and
Lait, L. R., Livesey, N., Waters, J., Kawa, S. R., Browell, E. V., Twigg, L., Douglass, A. R., Read, W., McGee, T. J., Froidevaux, L., Santee, M. L., Schoeberl, M. R., Pumphrey, H. C.   +12 more
core   +1 more source

Evaluating the potential of different carbon sources to promote denitrification [PDF]

, 2020
Organic carbon (C) plays an essential role in the denitrification process as it supplies energy for N2O, N2 and CO2 producing reactions. The objectives of this study were to: (i) rank the reactivity of different C compounds found in manures based on ...
Dlamini, J., Cardenas, L. M., Hawkins, J., Chadwick, D. R., Cardenas, L., Hawkins, J.M.B., Ma, Y., Dlamini, Jerry Celumusa, Martinez, J., Martinez, José, Hawkins, J. M. B., Chadwick, D., Dlamini, J. C., Scholefield, D.   +13 more
core   +1 more source

Toward a Paradigm Shift in Low‐Temperature SCR Catalyst Design: Defect Engineering and Data‐Driven Integration

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
This work systematically reviews the key factors influencing the performance of low‐temperature NH3‐SCR. The mechanism and challenges of defect engineering strategies, such as oxygen vacancies, heteroatom doping, crystal facet exposure, and surface reconstruction, in controlling both activity and selectivity were analyzed.
Rongrong Kan, Pinjing He, Fan Lü, Hua Zhang   +3 more
wiley   +1 more source

Nitrogen removal in marine environments: recent findings and future research challenges [PDF]

, 2005
Respiratory reduction of nitrate (denitrification) is recognized as the most important process converting biologically available (fixed) nitrogen to N2. In current N cycle models, a major proportion of global marine denitrification (50–70%) is assumed to
Bo Thamdrup, Thamdrup, Bo, Donald E. Canfield, Gilbert, Franck, Dalsgaard, T, Thamdrup, B, Canfield, Donald E., Engström, Pia,, Dalsgaard, Tage, Kristina Sundbäck, Robert C. Aller, Hulth, Stefan, Sundb\ue4ck, Kristina, Engström, Pia, Tage Dalsgaard, Aller, R. C, Canfield, D. E, Franck Gilbert, Engstr\uf6m, Pia, Aller, Robert Curwood, Sundbäck, Kristina, Gilbert, F., Hulth, Stefan,, Stefan Hulth, Pia Engström, Sundbäck, Kristina,   +25 more
core   +1 more source

Soil Mineral Nitrogen Concentrations Do Not Affect the Ability of Plantain (Plantago lanceolata L.) to Reduce Nitrous Oxide Emissions From Cattle Urine Patches

Journal of Plant Nutrition and Soil Science, EarlyView.
ABSTRACT Background Results to date on the effectiveness of plantain (Plantago lanceolata L.) use as a nitrous oxide (N2O) mitigation tool have been variable. In this context, soil mineral N and water content might be factors regulating plantain effectiveness in reducing N2O emissions.
Priscila L. Simon, Pablo L. Ribeiro, Celeste Lane, Alison Rutherford, Cecile A. M. de Klein   +4 more
wiley   +1 more source