%0 Journal Article
%9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES
%A Clément, R.
%A Legchenko, Anatoli
%A Quetu, M.
%A Descloitres, Marc
%A Oxarango, L.
%A Guyard, Hélène
%A Girard, J. F.
%T Experimental study of domestic waste material using magnetic resonance measurements
%D 2011
%L PAR00008553
%G ENG
%J Near Surface Geophysics
%@ 1569-4445
%M ISI:000300855300010
%N 2
%P 179-185
%R 10.3997/1873-0604.2010069
%U https://www.documentation.ird.fr/hor/PAR00008553
%> https://www.documentation.ird.fr/intranet/publi/depot/2021-03-11/010081622.pdf
%V 9
%W Horizon (IRD)
%X In this paper, we present results of a laboratory and in situ study of a domestic waste landfill using magnetic resonance measurements. For our study, we used a laboratory Earth's field nuclear magnetic resonance (NMR) instrument developed at LTHE and a large-scale commercial magnetic resonance sounding (MRS) system NUMISLITE from IRIS Instruments. We show that NMR could be a tool for investigating different processes in water-saturated waste samples. Our results show that domestic waste material contains ferromagnetic or paramagnetic particles that perturb the homogeneity of the geomagnetic field at a microscopic scale and render an NMR signal short. Consequently, only the spin echo technique can be applied for measuring. At a macroscopic scale, waste and different buried objects may also perturb the natural geomagnetic field. While investigating the landfill, we observed that magnetic anomalies (+/-2500 nT) are localized around some cells. This is probably linked to the presence of a higher percentage of metallic objects within the waste disposal. Our first appraisal of the possibility of investigating water-saturated waste in a laboratory using an Earth's field NMR instrument shows that, with existing instruments, waste samples can be studied when the dry density of waste is less than approximately 450 kg/m(3). Because the relaxation times of magnetic resonance signals in landfill may be short (T-2 < 100 ms and T-2*<10 ms), existing large-scale MRS instrumentation is not adapted to the investigation of domestic waste landfills.
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