PREDICTIVE-DESCRIPTIVE MODELS FOR GAS AND SOLUTE DIFFUSION COEFFICIENTS IN VARIABLY SATURATED POROUS MEDIA COUPLED TO PORE-SIZE DISTRIBUTION

Autor: Torben Olesen, Dennis E. Rolston, Per Moldrup, Toshiko Komatsu, Seiko Yoshikawa

Publikováno v: Moldrup, P, Olesen, T, Yoshikawa, S, Komatsu, T & Rolston, D E 2005, ' Predictive-descriptive models for gas and solute diffusion coefficients in variably saturated porous media coupled to pore-size distribution : I. Gas diffusivity in repacked soil ', Soil Science, vol. 170, no. 11, pp. 843-853 . https://doi.org/10.1097/01.ss.0000196769.51788.73

The soil gas and solute diffusion coefficients and their dependency on soil total porosity (Φ), fluid-phase (air or water) contents, and pore-size distribution largely control chemical release, transport, and fate in soil. The diffusion coefficients

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c0c1ae4636c906d80714c4b180155bf7
https://doi.org/10.1097/01.ss.0000196769.51788.73

PREDICTIVE-DESCRIPTIVE MODELS FOR GAS AND SOLUTE DIFFUSION COEFFICIENTS IN VARIABLY SATURATED POROUS MEDIA COUPLED TO PORE-SIZE DISTRIBUTION

Autor: Seiko Yoshikawa, Toshiko Komatsu, Dennis E. Rolston, Torben Olesen, Per Moldrup, Ann M. Mcdonald

Publikováno v: Soil Science. 170:867-880

Accurate description of the soil-gas diffusion coefficient (Dp) as a function of air-filled (e) and total (Φ) porosities is required for studies of gas transport and fate processes. After presenting predictive models for Dp in repacked and undisturb

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2a115b31de17199f0ca6dd01f4037890
https://doi.org/10.1097/01.ss.0000196770.45951.06

Gas Diffusivity in Undisturbed Volcanic Ash Soils

Autor: Seiko Yoshikawa, Dennis E. Rolston, Per Moldrup, Toshiko Komatsu, Torben Olesen

Publikováno v: Soil Science Society of America Journal. 67:41-51

Soil-water-characteristic-dependent (SWC-dependent) models to predict the gas diffusion coefficient. D r , in undisturbed soil have only been tested within limited ranges of pore-size distribution and total porosity. Andisols (volcanic ash soils) exh

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::671e69a789797f35fb90af8b4f9f529f
https://doi.org/10.2136/sssaj2003.4100

QUANTIFICATION OF 14C-LABELED HYDROPHOBIC ORGANIC COMPOUNDS IN SOIL SAMPLES BY A SCINTILLATION FLUID EXTRACTION METHOD

Autor: Kaj Henriksen, Peter Roslev, Torben Olesen, Dennis E. Rolston, Martin Hesselsøe, Jesper Gamst, Per Moldrup

Publikováno v: Gamst, J, Hesselsøe, M, Roslev, P, Roslev, P, Møldrup, P, Henriksen, K & Henriksen, K 2002, ' Quantification of 14C-labeled hydrophobic organic compounds in soil samples by a scintillation fluid extraction method ', Soil Science, vol. 167, no. 1, pp. 25-34 .

Hydrophobic organic chemicals labeled with 14 C are often used as tracers to study chemical fate and transport in soil. Wet oxidation is the recognized but labor-demanding method used most often to measure the concentration of radioactive organic tra

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f7ba10c144b07400ed16a250db1fb45a
https://doi.org/10.1097/00010694-200201000-00003

CONSTANT SLOPE IMPEDANCE FACTOR MODEL FOR PREDICTING THE SOLUTE DIFFUSION COEFFICIENT IN UNSATURATED SOIL

Autor: Torben Olesen, T. Yamaguchi, Per Moldrup, D. E. Rolston

Publikováno v: Soil Science. 166:89-96

Solute diffusivity (ratio of diffusion coefficients in soil and free water, D s /D 0 ) is markedly soil-type dependent. Soil texture and pore size distribution govern the threshold soil-water content (θ th ) where D S /D 0 approaches zero as a resul

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e068f3adccf8053c7ebe50abfaecc272
https://doi.org/10.1097/00010694-200102000-00002