Effects of alcohol-partitioning type and airflow on cosolvent flooding to benzene-LNAPL saturated porous media.
This study fundamentally investigated the swelling and distribution of benzene-light nonaqueous phase liquid (LNAPL) in porous media while cosolvent was flushed to the benzene-partially saturated system. Furthermore, the effects of simultaneous injection of cosolvent and air on the LNAPL behavior were visualized and thus quantified within a two-dimensional transparent porous medium. Partitioning types of alcohols affected dissolution of benzene entrapped in porous media. Tert-butanol (TBA) and 1-propanol floods apparently increased the LNAPL area, while a 70% ethanol flood reduced the LNAPL area by dissolution. Airflow facilitates mobilization of the swollen LNAPL by TBA and 1-propanol, while it facilitates dissolution of non-swollen LNAPL by ethanol. Therefore, LNAPL behavior during cosolvent flooding would be determined by partitioning type of alcohols and the presence of airflow.
Jeong
Seung-Woo
SW
Department of Environmental Engineering, Kunsan National University, Kunsan, Republic of Korea. swjeong@kunsan.ac.kr
Ju
Byung-Kyu
BK
Lee
Byung-Jin
BJ
D000433:1-Propanol; D000388:Air; D000438:Alcohols / Q000737:chemistry*; D001554:Benzene / Q000737:chemistry*; D004867:Equipment Design; D016062:Porosity; D012995:Solubility; D012997:Solvents / Q000737:chemistry; D014783:Viscosity; D020002:tert-Butyl Alcohol
D000438:Alcohols; D012997:Solvents; D000433:1-Propanol; D001554:Benzene; D020002:tert-Butyl Alcohol