U.S. EPA Contaminated Site Cleanup Information (CLU-IN)


U.S. Environmental Protection Agency
U.S. EPA Technology Innovation and Field Services Division

Search Result

EMULSIFIED POLYCOLLOID SUBSTRATE BIOBARRIER FOR BENZENE AND PETROLEUM-HYDROCARBON PLUME CONTAINMENT AND MIGRATION CONTROL: A FIELD-SCALE STUDY
Lee, T.H., W.Z. Cao, D.C. W. Tsang, Y.T. Sheu, K.F. Shia, and C.M. Kao.
Science of the Total Environment 666:839-848(2019)

Benzene served as the target compound in a field-scale biobarrier study at an abandoned petrochemical manufacturing facility site where a leaking storage tank released benzene and other petroleum products. The biobarrier's emulsified polycolloid substrate (EPS), consisting of cane molasses, soybean oil, and surfactants, was pressure-injected into three remediation wells. Groundwater monitoring showed that EPS injection increased total organic carbon concentrations (up to 786 mg/L) in groundwater, which also resulted in the formation of anaerobic conditions. An abrupt drop in benzene concentration (from 6.9 mg/L to < 0.04 mg/L) was observed after EPS supplementation in the remediation wells (RWs) due to both sorption and biodegradation mechanisms. The first-order decay rate in RW1 increased from 0.003 to 0.023/d after EPS application. Results demonstrated the efficacy of the EPS biobarrier in containing the petroleum-hydrocarbon plume and preventing its migration downgradient.



The Technology Innovation News Survey welcomes your comments and suggestions, as well as information about errors for correction. Please contact Michael Adam of the U.S. EPA Office of Superfund Remediation and Technology Innovation at adam.michael@epa.gov or (703) 603-9915 with any comments, suggestions, or corrections.

Mention of non-EPA documents, presentations, or papers does not constitute a U.S. EPA endorsement of their contents, only an acknowledgment that they exist and may be relevant to the Technology Innovation News Survey audience.