Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2014, Vol. 11, No. 3, pp. 288-300
The dependence of bound water dielectric constant in bentonite on moisture and temperature
T.A. Belyaeva
1 , P.P. Bobrov
1 , V.L. Mironov
2 , O.V. Rodionova
1 1 Omsk State Pedagogical University, Omsk, Russia
2 L.V. Kirensky Institute of Physics, Siberian Branch RAS, Krasnoyarsk, Russia
The results of complex dielectric permittivity (CDP) measurements of bentonite depending on moisture and temperature at frequencies from 1 MHz to 8.5 GHz are presented. Dielectric properties of bound water are investigated using refractive mixing dielectric model. It is shown that CDP of bound water at frequencies below 1 GHz depends on its quantity, and this dependence is not monotonic. The real and imaginary parts of the CDP reach maximum values at the moisture of 0,04-0,07 m3/m3 and increase with temperature rise. A model describing bound water CDP dependence on frequency, temperature and moisture, including three frequency relaxation areas, is created. The regression equations relating the parameters of the model to temperature and moisture were found. Bentonite CDP model results deviate from experimental data by less than 10% for the real part of CDP, and 15-20% for the imaginary part.
Keywords: dielectric permittivity, bound water, bentonite, dielectric relaxation, refractive mixing dielectric model.
Full textReferences:
- Belyayeva T.A., Bobrov A.P., Bobrov P.P., Galeev O.V., Mandrygina V.N., Opredeleniye parametrov modeley dielektricheskoy pronitsayemosti pochv s razlichnoy plotnost'yu i razlichnym soderzhaniyem gumusa po dannym eksperimental'nykh izmereniy v chastotnom diapazone 0,1 - 20 GGts (Determining the parameters of dielectric constant of soils with different densities and different humus according to the experimental measurements at frequency range of 0,1-20 GHz), Issledovaniye Zemli iz kosmosa. 2003, No 5, pp. 28-34.
- Belyayeva T.A., Bobrov P.P., Ivchenko O.A., Mandrygina V.N., Zavisimost' dielektricheskoy pronitsayemosti svyazannoy vody v pochvakh ot yeye kolichestva (Dependence of bound water dielectric constant in soils on its quantity), Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2006, Vol. 3, No. 2, pp. 281-286.
- Belyayeva T.A., Bobrov P.P., Kondrat'yeva O.V., Izmeneniye dielektricheskikh svoystv svyazannoy vody v pochvakh pri uvelichenii yeye kolichestva (Change in the dielectric properties of bound water in the soils by increasing its quantity), Vestnik Sibirskogo gosudarstvennogo aerokosmicheskogo un-ta im. akad. M. F. Reshetneva (Vestnik SibGAU), 2013, 5(51), pp. 92-95.
- Bobrov P.P., Kondrat'yeva O.V., Repin A.V., Izmereniye kompleksnoy dielektricheskoy pronitsayemosti obraztsa v odnoy yacheyke ot desyatkov gerts do yedinits gigagerts (Measurement of the sample's complex permittivity in a single cell from tens of Hz to several GHz), Izvestiya Vuzov. Fizika, 2012, No. 8/3, pp. 23-26.
- Bobrov P.P., Mironov V.L., Ivchenko O.A., Krasnoukhova V.N., Spektroskopicheskaya model' dielektricheskoy pronitsayemosti pochv, ispol'zuyushchaya standartizovannyye agrofizicheskiye pokazateli (Spectroscopic model of soils' permittivity using standardized agrophysical indicators), Issledovaniye Zemli iz kosmosa, 2008, No. 1, pp. 15–23.
- Boyarskiy D.A., Tikhonov V.V., Uchet dielektricheskikh svoystv svyazannoy vody pri modelirovanii effektivnoy dielektricheskoy pronitsayemosti vlazhnykh pochv v SVCH-diapazone (Account of the bound water dielectric properties in the simulation of the moist soils effective permittivity in the microwave range), Radiotekhnika i elektronika, 1998. Vol. 43, No. 4, pp. 446-454.
- Boyarskii D.A., Tikhonov V.V., Komarova N.Yu., Model of dielectric constant of bound water in soil for applications of microwave remote sensing, Progress in Electromagnetics Research, PIER, 2002, Vol. 35, pp. 251–269.
- Ishida T., Makino T., Wang C., Dielectric-relaxation spectroscopy of kaoliite, montmorillonite, allophane, and imogolite under moist conditions, Clays and Clay Minerals, 2000, Vol. 48, No. 1, pp. 75-84.
- Kelleners T. J., Robinson D. A., Shouse P. J, Frequency dependence of the complex permittivity and its impact on dielectric sensor calibration in soils, Soil Sci. Soc. Am. J., 2005, Vol. 69, No. 1, pp. 67–76.
- Mironov V.L, Bobrov P.P, Kosolapova L.G, et al., Data processing technique for deriving soil water spectroscopic parameters in microwave, Proceedings of the 2006 IEEE Geoscience and Remote Sensing Symposium. Denver, USA, 2006, Vol. 6, pp. 2957–2961.
- Mironov V.L., Bobrov P.P., Fomin S.V., Multirelaxation generalized refractive mixing dielectric model of moist soils, IEEE Geoscience and Remote Sensing Letters, 2013, Vol. 10, No. 3, pp. 603-606.
- Mironov V.L., Dobson M.C., Kaupp V.H., et al., Generalized refractive mixing dielectric model for moist soils, IEEE Trans. Geosci. Remote Sensing, 2004, Vol. 42, No. 4, pp. 773–785.