TY - GEN
T1 - Study on the effect of LNAPL pollution to soil complex permittivity
AU - Li, Hongli
AU - Lu, Qi
AU - Feng, Xuan
AU - Liu, Cai
AU - Liang, Wenjing
AU - Zou, Lilong
PY - 2012/10/3
Y1 - 2012/10/3
N2 - According to the principle of reflection of electromagnetic waves, the authors use the open-ended coaxial probe method which operate the high frequency electromagnetic wave (200 MHz-8.5 GHz) to measure the dielectric constant of sand saturated with water and LNAPL (light non-aqueous phase liquid) under the laboratory conditions. The experimental results show the real part of the complex permittivity increases with LNAPL volume increasing and the imaginary part changes very little. However, the variation of the complex permittivity is not obvious after the sand is saturated. When the quartz sand contains water, the real and the imaginary parts of the complex permittivity increase with the volumetric content of LNAPL increasing. After some hours, both the real and imaginary parts of complex permittivity of the sand partly saturated with water and LNAPL have changed. In the study frequency range, the real part of complex permittivity decreases gradually with the frequency of electromagnetic wave elevation, the changes of the imaginary part is different. The experimental results show that the change of the mixture structure due to the LNAPL replacing the air in the pore and the absorption of the LNAPL, water and medium changes the ionic polarizability and further changes the dielectric properties of the mixture.
AB - According to the principle of reflection of electromagnetic waves, the authors use the open-ended coaxial probe method which operate the high frequency electromagnetic wave (200 MHz-8.5 GHz) to measure the dielectric constant of sand saturated with water and LNAPL (light non-aqueous phase liquid) under the laboratory conditions. The experimental results show the real part of the complex permittivity increases with LNAPL volume increasing and the imaginary part changes very little. However, the variation of the complex permittivity is not obvious after the sand is saturated. When the quartz sand contains water, the real and the imaginary parts of the complex permittivity increase with the volumetric content of LNAPL increasing. After some hours, both the real and imaginary parts of complex permittivity of the sand partly saturated with water and LNAPL have changed. In the study frequency range, the real part of complex permittivity decreases gradually with the frequency of electromagnetic wave elevation, the changes of the imaginary part is different. The experimental results show that the change of the mixture structure due to the LNAPL replacing the air in the pore and the absorption of the LNAPL, water and medium changes the ionic polarizability and further changes the dielectric properties of the mixture.
KW - Complex dielectric constant
KW - GPR (Ground Penetrating Radar)
KW - LNAPL
KW - Quartz sand
UR - http://www.scopus.com/inward/record.url?scp=84866787904&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84866787904&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84866787904
SN - 9781467326636
T3 - 2012 14th International Conference on Ground Penetrating Radar, GPR 2012
SP - 34
EP - 38
BT - 2012 14th International Conference on Ground Penetrating Radar, GPR 2012
T2 - 2012 14th International Conference on Ground Penetrating Radar, GPR 2012
Y2 - 4 June 2012 through 8 June 2012
ER -