2026-06-28T15:19:57Zhttps://docta.ucm.es/rest/oai/requestoai:docta.ucm.es:20.500.14352/722882024-10-03T13:54:36Zcom_20.500.14352_14col_20.500.14352_15
Non-Ionic Surfactant Recovery in Surfactant Enhancement Aquifer Remediation Effluent with Chlorobenzenes by Semivolatile Chlorinated Organic Compounds Volatilization
Sáez González, Patricia
García Cervilla, Raúl
Romero, Arturo
Lorenzo Fernández, David
Surfactant enhanced aquifer remediation is a common treatment to remediate polluted sites with the inconvenience that the effluent generated must be treated. In this work, a complex mixture of chlorobenzene and dichlorobenzenes in a non-ionic surfactant emulsion has been carried out by volatilization. Since this techhnique is strongly affected by the presence of the surfactant, modifying the vapour pressure, P0v,��0, and activity coefficient, γ�, a correlation between P0vjγj���0�� and surfactant concentration and temperature was proposed for each compound, employing the Surface Response Methodology (RSM). Volatilization experiments were carried out at different temperatures and gas flow rates. A good agreement between experimental and predicted remaining SVCOCs during the air stripping process was obtained, validating the thermodynamic parameters obtained with RSM. Regarding the results of volatilization, at 60 °C 80% of SVCOCs were removed after 6 h, and the surfactant capacity was almost completely recovered so the solution can be recycled in soil flushing.
2023-06-22T11:17:34Z
2023-06-22T11:17:34Z
2023-06-22T11:17:34Z
2022
journal article
https://hdl.handle.net/20.500.14352/72288
1660-4601
10.3390/ijerph19127547
eng
(S2018/EMT-4317)
PID2019-105934RB
Program (LIFE17 ENV/ES/000260)
(ref. BES-2017-081782)
https://creativecommons.org/licenses/by/3.0/es/
open access
Atribución 3.0 España
MDPI