Ni Yan

Hydrology and Water Resources / College of Science

Characterization and Remediation of Organic-compound Contaminated Groundwater

Human activities, especially industrial activities and gasoline leakage, may cause serious groundwater contamination. The contaminated groundwater is likely lead to serious social, economic and environmental consequences. Organic solvents (such as TCE, 1,4-dioxane), persistent organic pollutants (POPs), BTEX (benzene, toluene, ethylbenzene, xylene), and so on have potential harmfulness to cause cancer, mutation and deformity. Therefore research on groundwater contaminant transport and remediation methods are essential for human health and social sustainable development. Lab combines field investigation will be conducted. Numerical models will also be used to simulate the solute transport processes. The first portion of the research is to collect background information on contaminants, in-situ chemical oxidation method, and field. The second portion of the research is to study on the transport behaviors of TCE and 1,4-dioxane in subsurface. In the lab, using soil column (represent the environment condition) to simulate the contaminants transport process in the soil media. Then try to apply lab scale experiment to field scale. After collecting data of water content, air pressure, temperature and salinity in three-dimensional space in the field, we can analyze multi-phase flow in subsurface using analytic and numerical methods. One-dimensional and three-dimensional models using Modflow (a computer software used to simulate groundwater flow and contaminant transport) would be established. Finally, apply advanced oxidation processes (AOPs) to degrade the contaminants. The result of the research is to improve the understanding of transport behavior of TCE and 1,4-dioxane, and conduct an effective remediation method in the field.