Search results for " fast field cycling NMR"

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Nature of water-biochar interface interactions

2012

A poplar biochar obtained by an industrial gasification process was saturated with water and analyzed using fast field cycling (FFC) NMR relaxometry in a temperature range between 299 and 353 K. Results revealed that the longitudinal relaxation rate increased with the increment of the temperature. This behavior was consistent with that already observed for paramagnetic inorganic porous media for which two different relaxation mechanisms can be accounted for: outer- and inner-sphere mechanisms. The former is due to water diffusing from the closest approach distance to infinity, whereas the second is due to water interacting by nonconventional H-bonds to the porous surface of the solid materi…

Materials scienceRenewable Energy Sustainability and the EnvironmentEcologyDiffusionSettore AGR/13 - Chimica AgrariaForestryAtmospheric temperature rangebiochar char fast field cycling NMR gasification longitudinal relaxation time NMRD relaxometryChemical physicsSoil waterBiocharRelaxation (physics)CharPorosityPorous mediumWaste Management and DisposalAgronomy and Crop Science

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