Results 11 to 20 of about 45,409 (167)

Methane in Lakes: Variability in Stable Carbon Isotopic Composition and the Potential Importance of Groundwater Input

Frontiers in Earth Science, 2021
Methane (CH4) is an important component of the carbon (C) cycling in lakes. CH4 production enables carbon in sediments to be either reintroduced to the food web via CH4 oxidation or emitted as a greenhouse gas making lakes one of the largest natural ...
Jonathan Schenk, Henrique O. Sawakuchi, Anna K. Sieczko, Gustav Pajala, David Rudberg, Emelie Hagberg, Kjell Fors, Hjalmar Laudon, Jan Karlsson, David Bastviken   +9 more
doaj   +1 more source

Fabricating a Polysulfone-ZIF-8 Composite Membrane for Separating CO2 and CH4 [PDF]

Iranian Journal of Chemical Engineering
In this research, a mixed matrix membrane based on polysulfone and zinc nitrate-methylimidazole fillers was synthesized to improve the ability of the polymer membrane for the separation of CO2 and CH4.
Pouneh Ramezani, Omid Alizadeh, Masoud Mokhtary   +2 more
doaj   +1 more source

Methanogenesis exceeds CH4 consumption in eutrophic lake sediments

Limnology and Oceanography Letters, 2021
Lakes and reservoirs collectively contribute significant amounts of methane (CH4) to the global atmosphere. If CH4 production were not at least partially balanced by consumption (oxidation) in most of these systems, they could potentially emit an order ...
Sofia L. D'Ambrosio, John A. Harrison
doaj   +1 more source

Estimation on annual water-air CO2 and CH4 fluxes in Pengxi River, Three Gorges Reservoir

Shui kexue jinzhan, 2013
Estimation on annual greenhouse gas fluxes in reservoirs is crucial for the assessment of reservoir greenhouse gas effects.A 1a research was conducted in Pengxi River backwater area,Three Gorges Reservoir to estimate annual water-air CO2 and CH4 fluxes ...
LI Zhe, BAI Lei, JIANG Tao, GUO Jingsong, LIU Jing   +4 more
doaj   +1 more source

Dominance of Diffusive Methane Emissions From Lowland Headwater Streams Promotes Oxidation and Isotopic Enrichment

Frontiers in Environmental Science, 2022
Inland waters are the largest natural source of methane (CH4) to the atmosphere, yet the contribution from small streams to this flux is not clearly defined.
Andrew L. Robison, Andrew L. Robison, Wilfred M. Wollheim, Clarice R. Perryman, Annie R. Cotter, Jessica E. Mackay, Ruth K. Varner, Paige Clarizia, Jessica G. Ernakovich   +8 more
doaj   +1 more source

An experimental study on nonlinear seepage characteristics in coal seams during CH4 displacement through N2 and CO2 flooding

Meitian dizhi yu kantan
BackgroundCoal seams in China are generally characterized by low porosity (
Zefeng LI, Mengru HUANG, Hongzhong ZHANG, Jianping LAN, Jinsuo SONG, Shixing FAN   +5 more
doaj   +1 more source

Making plant methane formation visible—Insights from application of 13C‐labeled dimethyl sulfoxide

Plant-Environment Interactions, 2022
Methane (CH4) formation by vegetation has been studied intensively over the last 15 years. However, reported CH4 emissions vary by several orders of magnitude, thus making global estimates difficult. Moreover, the mechanism(s) for CH4 formation by plants
Moritz Schroll, Katharina Lenhart, Steffen Greiner, Frank Keppler   +3 more
doaj   +1 more source

Warming Effect from Soil Greenhouse Gas Emission of Each Mangrove Zone during the Dry Season in Ngurah Rai Forest Park, Bali, Indonesia

Environment and Natural Resources Journal
In addition to functioning as a carbon sink, mangrove soil also releases greenhouse gases (GHGs) through microbial metabolism. GHG flux fluctuates according to the ecological parameters of mangroves and climate variability.
I Putu Sugiana, Tri Prartono, Rastina, Alan Frendy Koropitan   +3 more
doaj   +1 more source

Potential of Methane (CH4), Nitrogen (N2), and Carbon Dioxide (CO2) from Eco-Enzyme with the Addition of Cow Feces Starter

Biology, Medicine & Natural Product Chemistry
Eco-enzyme solutions are generally used in the manufacture of disinfectants, floor cleaners, liquid fertilizers, preservatives and others. In this study, eco-enzyme was used as the main ingredient in the manufacture of biogas fermentation with the ...
Marlina Kamelia, Aulia Ulmillah, Suci Wulan Pawhestri   +2 more
doaj   +1 more source

Widespread dominance of methane ebullition over diffusion in freshwater aquaculture ponds

Frontiers in Water, 2023
An ever-increasing demand for protein-rich food sources combined with dwindling wild fish stocks has caused the aquaculture sector to boom in the last two decades.
Renske J. E. Vroom, Sarian Kosten, Rafael M. Almeida, Raquel Mendonça, Ive S. Muzitano, Ive S. Muzitano, Icaro Barbosa, Jonas Nasário, Ernandes S. Oliveira Junior, Alexander S. Flecker, Nathan Barros   +10 more
doaj   +1 more source