Results 131 to 140 of about 28,805 (221)

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

The Canadian Journal of Chemical Engineering, Volume 104, Issue 8, Page 4419-4434, August 2026.
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

Controle operacional de reator em bateladas sequênciais (RBS): ajustes na concentração de oxigênio dissolvido visando a remoção de nutrientes [PDF]

, 2008
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico, Programa de Pós-Graduação em Engenharia Ambiental, Florianópolis, 2008.Na última década, o sistema de tratamento de esgotos domésticos por lodos ativados perdeu espaço ...
Thans, Felipe Castellani
core  

Denitrification characteristics of a sulfur autotrophic denitrification reactor

Journal of Hebei University of Science and Technology, 2016
The denitrification characteristics of a sulfur autotrophic denitrification reactor are investigated. The results show that domestication of sulfur autotrophic bacteria is completed within 15 days after biofilm formation in the reactor, which is shorter than other similar researches.
Chenxiao ZHANG, Yankai GUO, Haifeng DU, Chao ZHANG, Sihui WANG, Jing LIAN, Jianbo GUO   +6 more
openaire   +1 more source

Effect of ammonium concentration on methane oxidation and CO2 removal in an anaerobic biotrickling filter treating synthetic landfill gas and leachate

Journal of Chemical Technology &Biotechnology, Volume 101, Issue 8, Page 1632-1642, August 2026.
Abstract BACKGROUND Landfill gas (LFG) and leachate are commonly treated separately through energy‐intensive processes. This study evaluated the integration of both streams in an anaerobic biotrickling filter (BTF) to achieve simultaneous methane (CH4) and carbon dioxide (CO2) removal coupled with ammonium (NH4+) transformation, and how the microbial ...
Cecilia Lizeth Alvarez‐Guzmán, Karla María Muñoz‐Páez, Alejandro Vargas, Idania Valdez‐Vazquez   +3 more
wiley   +1 more source

Seasonal Restructuring of Microbial Communities and Resistomes in the Shitalakshya River, Bangladesh Revealed by Shotgun Metagenomics

MicrobiologyOpen, Volume 15, Issue 4, August 2026.
Dry‐season pollutant concentration drives microbial restructuring in Bangladesh's Shitalakshya River, shifting communities from Myroides to stress‐tolerant genera while enriching metal resistance genes and efflux pumps, revealing non‐antibiotic co‐selection as a key driver of antimicrobial resistance in urban waters.
Muhammad Ehteshamul Haque, Md. Shaminur Rahman, Munawar Sultana, Anowara Begum   +3 more
wiley   +1 more source

Removal of Aluminum Nitride from Secondary Aluminum Ash and its Aluminum Recovery

Kuangchan zonghe liyong
The aluminum nitride in the secondary aluminum (Al) dross release ammonia gas when it contacts with water. Therefore, the aluminum nitride poses a serious security threat to the environment. Denitrification is an important way to realize the harmless and
Neng QIU, Hongfei LIN, Lihai LU, Qifeng YANG, Yuwen ZHOU   +4 more
doaj   +1 more source

Establishment of a Purge and Trap Continuous‐Flow Isotope Ratio Mass Spectrometer System for Analysis of Stable Nitrate Isotopes (δ15N and δ18O) in Water Samples by Ti(III) Reduction

Rapid Communications in Mass Spectrometry, Volume 40, Issue 14, 30 July 2026.
ABSTRACT Rationale Pollution of surface and shallow groundwater by nitrate (NO3−$$ {\mathrm{NO}}_3^{-} $$) is a global concern, resulting in the deterioration of drinking water quality. Stable isotopes of NO3−$$ {\mathrm{NO}}_3^{-} $$ (δ15N and δ18O) can be used to trace its sources and identify prevailing biogeochemical processes.
Monis Nolitha Gcakasi, Christine Stumpp, Andrea Watzinger   +2 more
wiley   +1 more source

The ability of nitrification inhibitors to decrease denitrification rates in dairy farm soils

, 2007
Increasing pressure is being placed on the dairy industry to reduce nitrogen losses from soil. Nitrification inhibitors are a management strategy that could be implemented on dairy farms to help reduce losses of nitrogen.
Watkins, Natalie Lisa
core  

Wood‐Derived Sphere‐Like Biochar Granules as an Electrode Platform for Future Bed Electrodes

ChemElectroChem, Volume 13, Issue 14, 17 July 2026.
Wood‐derived, sphere‐like granular biochar (GB) modified with NiMo is introduced as a potential cathode platform for the hydrogen evolution reaction at neutral pH for use in CO2‐reducing bioelectrochemical systems. They exhibit remarkably higher electrocatalytic activity, making wood‐derived sphere‐like GB a promising stackable cathode material for ...
Shabnam Pouresmaeil, Jan Griebel, Andrea Prager, Falk Harnisch, Jörg Kretzschmar   +4 more
wiley   +1 more source

Temperature response of denitrification rate and greenhouse gas production in agricultural river marginal wetland soils

, 2013
Soils are predicted to exhibit significant feedback to global warming via the temperature response of greenhouse gas (GHG) production. However, the temperature response of hydromorphic wetland soils is complicated by confounding factors such as oxygen ...
Bonnett, S. A. F., Cook, V., Bonnett, Samuel, Leah, R., O'connor, M., Blackwell, M. S. A., Blackwell, M. S.A., Bonnett, S. A.F., Maltby, E.   +8 more
core   +1 more source