Surface Chemistry of Oil/Soil/Water Systems for Improved Oil Removal from Contaminated Soil by Air-Sparged Hydrocyclone FlotationEPA Grant Number: R825396
Title: Surface Chemistry of Oil/Soil/Water Systems for Improved Oil Removal from Contaminated Soil by Air-Sparged Hydrocyclone Flotation
Investigators: Miller, Jan D. , Drelich, Jaroslaw
Current Investigators: Miller, Jan D.
Institution: University of Utah
EPA Project Officer: Hiscock, Michael
Project Period: January 20, 1997 through January 19, 2000 (Extended to January 19, 2001)
Project Amount: $315,706
RFA: Exploratory Research - Water Chemistry and Physics (1996) RFA Text | Recipients Lists
Research Category: Water , Land and Waste Management , Engineering and Environmental Chemistry
The goal of this project is to develop a novel, inexpensive, and fast cleanup process to remove oils from contaminated soil and sediment using the air-sparged hydrocyclone (ASH) flotation technology developed at the University of Utah. Three major areas associated with oil/soil/water systems have been identified in order to undertake a comprehensive study and realize the proposed research objective: (i) selection of surface and solution chemistry conditions for oil release and flotation, (ii) optimization of froth stability in relation to oil flotation in ASH flotation units, and (iii) specification of operating variables of ASH technology for cleanup of oily soil. Comprehensive fundamental studies will center on the surface chemistry of oil/soil/water systems, including examination of physicochemical properties, surface hydrophobicity, oil/soil interactions, stability of oil-in-water emulsions, release of oil from mineral surfaces, coalescence of oil droplets with air bubbles, oil spreading on air bubble surfaces, the effect of oil on foam stability, and flotation response. Based on these surface chemistry studies, an exploratory series of flotation tests in a 2-inch ASH will be carried out to demonstrate/evaluate the surface chemistry controlled ASH flotation technology for the deoiling of various contaminated soils. It is expected that efficient separation of oil from contaminated soil can be achieved by ASH flotation at an extremely high specific capacity (200-400 gpm/ft 3), if the appropriate surface chemistry conditions can be established.