In-Situ Groundwater Remediation Technology

Professor Liming Hu, Tsinghua University, China

The AGS together with the CGSE invite you to this presentation.

Abstract

Severe situation of organics-contaminated groundwater calls for effective in-situ remediation technology. Micro-nano-bubbles (MNBs), with diameters ranging from tens of nanometers to tens of micrometers, present rapid mass transfer rates, persist for a relatively long time in water, and transport with groundwater flow, which significantly improve gas concentration and provide a continuous gas supply. Therefore, MNBs show a considerable potential for application in groundwater remediation. The characteristics of ozone MNBs were examined, including their size distribution, bubble quantity, and zeta potential. The mass transfer rate of ozone MNBs was experimentally investigated. Ozone MNBs were then used to treat organics-contaminated water, and they showed remarkable cleanup efficiency. Column tests were also conducted to study the efficiency of ozone MNBs for organics-contaminated groundwater remediation. An theoretical model was developed to describe MNBs migration and remediation process. Furthermore, field monitoring was conducted on a trichloroethylene (TCE) contaminated site. The results showed that ozone MNBs can greatly improve remediation efficiency and represent an innovative technology for in situ remediation of organics-contaminated groundwater.

About Professor Liming Hu

Dr. Liming Hu is Professor of Geotechnical Engineering at Tsinghua University. He obtained Double B. Eng Degrees of Hydraulic Engineering and Environmental Engineering, and Ph.D. Degree of Geotechnical Engineering at Tsinghua University, then worked at the Hong Kong University of Science and Technology for 2 years as Post-Doc fellow before he joined in Tsinghua University. Prof. Hu’s research interest includes multi-physics coupling behaviors and Micro-mechanics of multiphase flow for geomaterials, as well as the applications in dam engineering, ground improvement, and geo-environmental engineering. He has over 200 publications in peer-reviewed journals and academic conferences. He obtained the several prestigious awards such as ASCE-EWRI Best Theoretical-Oriented Paper, IACMAG Excellent Regional Contribution Award, and the First Class National Invention Prize of China. He serves as Chairman of Young Scholar Committee and vice-chairman of Technical Committee of Geo-Environmental Engineering.

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