Dnapl Contamination Articles & Analysis
8 articles found
1. Biosurfactants. The native microbial population increases rapidly when easily degradable carbon like ERDENHANCED is provided. Intrinsic aerobic and facultative bacteria include species of Bacillus, Pseudomonas, and Rhodococcus, which produce many powerful biosurfactants, including lipopeptides, glycolipids and rhamnolipids. These biosurfactants reduce the interfacial tension between water and ...
Ivey-sol® surfactant mictures are non-ionic and have the unique ability to selectively desorb contamination (LNAPL, DNAPL's, PAH, PCB, DCE, TCE, PCE), ...
The optimization design of surfactant-enhanced aquifer remediation for dense non-aqueous phase liquids (DNAPLs)-contaminated groundwater is proposed through integrating simulation and optimization models. ...
The subject facility had been in operational since ca. 1971. The DNAPL contamination was comprised of DCE (Dichloroethylene) and TCE (Trichloroethylene) dry-cleaning solvents. ...
The remediations targeted regions where dense non-aqueous phase liquid (DNAPL) was considered very likely, with contaminant concentrations greater than 10% of the water solubility limit. Pre-treatment groundwater concentrations were as high as 204,000 µg/l chlorobenzene and 990,000 µg/l trichloroethene. DNAPL was successfully removed ...
Abstract: Remediation of coal tar at former Manufactured Gas Plant (MGP) sites, and creosote associated with wood preservative sites is challenging due to the viscous nature of the dense non-aqueous phase liquid (DNAPL) and the modest solubility and vapor pressure of the contaminants of concern (COCs). ...
Abstract A PCE DNAPL source zone was treated using thermal conduction heating combined with multi-phase extraction. Thick peat layers, even when contaminated with PCE DNAPL, were remediated to average soil PCE concentrations of 0.17 mg/kg (99.6% reduction compared to starting levels). ...
Contamination from the use of chlorinated solvents, often classified as dense nonaqueous phase liquids (DNAPLs) when in an undissolved state, represents an environmental challenge with global implications. ...