Abstract
To verify the applicability of the time-continuous electrical conductivity (EC) measurement in analyzing the contaminant movement in the subsurface, a new column test device employing non-destructive four-electrode sensors was developed. Using the seawater to create a simple one-dimensional steady-flow condition, laboratory transport experiments were conducted and the EC breakthrough curves at different distances were obtained. Comparison between the EC breakthrough curves obtained from the EC sensors and those from the effluent solute chemical analysis showed that the estimated resident concentration from the EC breakthrough curves are useful in understanding solute transport in soils. The pore water velocity and longitudinal dispersion coefficient estimated using the computer code, CXTFIT, were found to be slightly underestimated, especially at sensors located at smaller distances from the outlet boundary. Results showed that the developed column test device employing the four-electrode sensors proposed in this study provides a non-destructive, convenient, and inexpensive means of evaluating the seawater transporting in soils.
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Acknowledgments
This study was financially supported by the National Natural Science Foundation of China (51078254, 51078253), Joint Research of NSFC-NRF Scientific Cooperation Program (51211140344), Program for New Century Excellent Talents in University of China (NCET-12-1039), the Top Young Academic Leaders of Higher Learning Institutions of Shanxi,and SNU BK21 research Program funded by Ministry of Education & Human Resources Development. The authors wish to express their gratitude to Dr. Y. Frank Chen for his valuable comments.
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Dong, X., Woo, H., Park, H. et al. Application of a newly developed column test device to analyze seawater transport in sandy soils. Environ Earth Sci 70, 2397–2404 (2013). https://doi.org/10.1007/s12665-013-2675-6
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DOI: https://doi.org/10.1007/s12665-013-2675-6