Japan Geoscience Union Meeting 2015

Presentation information

International Session (Poster)

Symbol A (Atmospheric and Hydrospheric Sciences) » A-GE Geological & Soil Environment

[A-GE04] Subsurface Mass Transport and Environmental Assessment

Sun. May 24, 2015 6:15 PM - 7:30 PM Convention Hall (2F)

Convener:*Yasushi Mori(Graduate School of Environmental and Life Science, Okayama University), Hirotaka Saito(Department of Ecoregion Science, Tokyo University of Agriculture and Technology), Ken Kawamoto(Graduate School of Science and Engineering, Saitama University), Shoichiro Hamamoto(Department of Biological and Environmental Engineering, The University of Tokyo), Ming Zhang(Institute for Geo-Resources and Environment, National Institute of Advanced Industrial Science and Technology)

6:15 PM - 7:30 PM

[AGE04-P05] Theoretical and Technical Criteria for Selecting and Designing Laboratory Diffusion Tests

*Ming ZHANG1, Mariko UCHIDA2, Miho YOSHIKAWA1 (1.AIST, 2.Chemical Grouting Co., LTD.)

Keywords:laboratory diffusion tests, through-diffusion, in-diffusion, theoretical solution, analytical precision

Mass transport in geo-environments is primarily controlled by advection, dispersion and sorption if no chemical and/or biochemical reactions and chain decay are involved. When permeability is low and/or hydraulic gradient is extremely small, mass transport in a geological stratum such as a clay layer will be controlled by diffusion and sorption.

To properly select a test method, and to effectively perform a laboratory diffusion test, theoretical solutions to both through and in-diffusions are overviewed. Based on discussion of analytical technologies for different kinds of chemicals, such as contaminants and/or nutrients associated with bio-remediation of volatile organic compounds (VOCs), this presentation illustrates how to selection a test method, how to shorten required testing time, how to determine sampling interval and how to interpret experimental data.