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| 001 | 5532 | ||
| 005 | 20180208232330.0 | ||
| 024 | 7 | _ | |2 DOI |a 10.2136/vzj2008.0030 |
| 024 | 7 | _ | |2 WOS |a WOS:000268871900020 |
| 037 | _ | _ | |a PreJuSER-5532 |
| 041 | _ | _ | |a eng |
| 082 | _ | _ | |a 550 |
| 084 | _ | _ | |2 WoS |a Environmental Sciences |
| 084 | _ | _ | |2 WoS |a Soil Science |
| 084 | _ | _ | |2 WoS |a Water Resources |
| 100 | 1 | _ | |0 P:(DE-Juel1)VDB1270 |a Pohlmeier, A. |b 0 |u FZJ |
| 245 | _ | _ | |a A Fast Field Cycling Nuclear Magnetic Resonance Relaxometry Study of Natural Soils |
| 260 | _ | _ | |a Madison, Wis. |b SSSA |c 2009 |
| 300 | _ | _ | |a 735 - 742 |
| 336 | 7 | _ | |a Journal Article |0 PUB:(DE-HGF)16 |2 PUB:(DE-HGF) |
| 336 | 7 | _ | |a Output Types/Journal article |2 DataCite |
| 336 | 7 | _ | |a Journal Article |0 0 |2 EndNote |
| 336 | 7 | _ | |a ARTICLE |2 BibTeX |
| 336 | 7 | _ | |a JOURNAL_ARTICLE |2 ORCID |
| 336 | 7 | _ | |a article |2 DRIVER |
| 440 | _ | 0 | |0 10301 |a Vadose Zone Journal |v 8 |x 1539-1663 |y 3 |
| 500 | _ | _ | |a The authors thank the German research fund (DFG) for financial support (Sta 511/4- 1, PO 746/2-1, and Transregio/SFB32), F. Pauly and U. Lesten (ZAT, Research Center Julich) for the recording CT images, C. Walraf (ICG-4, Research Center Julich) for the BET measurements, and J. Koestel and A.-P. Schmidt-Eisenlohr (ICG4, Research Center Julich) 360 for the water retention curves of the soils. |
| 520 | _ | _ | |a This study used nuclear magnetic resonance (NMR) relaxometry at different Larmor frequencies to investigate water dynamics in the pore space of natural porous media. Spin-lattice NMR relaxation times (T-1) were determined in purified fine sand and two natural soils, Kaldenkirchen sandy loam and Merzenhausen silt loam, by means of fast field This technique investigates relaxation processes as a function of the Larmor frequency. in the 0.005 and 20 MHz, yielding so-called relaxation dispersion curves (1/T-1 vs. log.). The data were further by means of inverse Laplace transformation to calculate the T-1 relaxation time distribution functions. Only sand was characterized by monomodal distribution with T-1 of about 1 s at 20 MHz, whereas the natural soil showed multi modal distribution functions in the range between 2 and 70 ms. With decreasing Larmor frequency, all distribution functions kept their shapes but were shifted to faster relaxation times. The corresponding relaxation dispersion curves indicate predominance of two-dimensional diffusion of water in the soils, whereas in the sand, diffusion behaved like unrestricted three-dimensional diffusion. In terms of the Brownstein-Tarr model, in the T-1 relaxation times with increasing silt and clay content can be explained by an increase of the volume ratios (S/V) of these porous media, i.e., by a decrease in the pore sizes. Finally, distribution functions of size parameter V/S were obtained from the spin-lattice relaxation time distributions by normalizing on the specific surface area. They ranged from submicrometers in the Merzenhausen soil to micrometers and submillimeters in soil and fine sand, respectively. |
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| 700 | 1 | _ | |0 P:(DE-Juel1)VDB12272 |a Haber-Pohlmeier, S. |b 1 |u FZJ |
| 700 | 1 | _ | |0 P:(DE-HGF)0 |a Stapf, S. |b 2 |
| 773 | _ | _ | |0 PERI:(DE-600)2088189-7 |a 10.2136/vzj2008.0030 |g Vol. 8, p. 735 - 742 |p 735 - 742 |q 8<735 - 742 |t Vadose zone journal |v 8 |x 1539-1663 |y 2009 |
| 856 | 7 | _ | |u http://dx.doi.org/10.2136/vzj2008.0030 |
| 909 | C | O | |o oai:juser.fz-juelich.de:5532 |p VDB |
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| 914 | 1 | _ | |y 2009 |
| 915 | _ | _ | |0 StatID:(DE-HGF)0010 |a JCR/ISI refereed |
| 920 | 1 | _ | |0 I:(DE-Juel1)VDB793 |d 31.10.2010 |g ICG |k ICG-4 |l Agrosphäre |x 1 |
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| 981 | _ | _ | |a I:(DE-Juel1)IBG-3-20101118 |
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