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Titolo:
Simulated formation and flow of microemulsions during surfactant flushing of contaminated soil
Autore:
Ouyang, Y; Cho, JS; Mansell, RS;
Indirizzi:
St Johns River Water Management Dist, Dept Water Resources, Palatka, FL 32178 USA St Johns River Water Management Dist Palatka FL USA 32178 a, FL 32178 USA Environm Strategies & Applicat Inc, Middlesex, NJ 08846 USA Environm Strategies & Applicat Inc Middlesex NJ USA 08846 x, NJ 08846 USA Univ Florida, Dept Soil & Water Sci, Gainesville, FL 32611 USA Univ Florida Gainesville FL USA 32611 ater Sci, Gainesville, FL 32611 USA
Titolo Testata:
WATER RESEARCH
fascicolo: 1, volume: 36, anno: 2002,
pagine: 33 - 40
SICI:
0043-1354(200201)36:1<33:SFAFOM>2.0.ZU;2-H
Fonte:
ISI
Lingua:
ENG
Soggetto:
GASOLINE;
Keywords:
NAPL; microemulsion; remediation; salinity; surfactant;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
15
Recensione:
Indirizzi per estratti:
Indirizzo: Ouyang, Y St Johns River Water Management Dist, Dept Water Resources, POB 1429, Palatka, FL 32178 USA St Johns River Water Management Dist POB 1429 Palatka FL USA 32178
Citazione:
Y. Ouyang et al., "Simulated formation and flow of microemulsions during surfactant flushing of contaminated soil", WATER RES, 36(1), 2002, pp. 33-40

Abstract

Contamination of groundwater resources by non-aqueous phase liquids (NAPLs) has become an issue of increasing environmental concern. This study investigated the formation and flow of microemulsions during surfactant flushingof NAPL-contaminated soil using the finite difference model UTCHEM, which was verified with our laboratory experimental data. Simulation results showed that surfactant flushing of NAPLs (i.e., trichloroethylene and tetrachloroethylene) from the contaminated soils was an emulsion-driven process. Formation of NAPL-in-water microemulsions facilitated the removal of NAPLs from contaminated soils. Changes in soil saturation pressure were used to monitor the mobilization and entrapment of NAPLs during surface flushing process. In general, more NAPLs were clogged in soil pores when the soil saturation pressure increased. Effects of aquifer salinity on the formation and flow of NAPL-in-water microemulsions were significant. This study suggests that the formation and flow of NAPL-in-water microemulsions through aquifer systems are complex physical-chemical phenomena that are critical to effective surfactant flushing of contaminated soils. (C) 2001 Elsevier Science Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 09/04/20 alle ore 20:08:29