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Int J Environ Res Public Health

Title:		Non-Ionic Surfactant Recovery in Surfactant Enhancement Aquifer Remediation Effluent with Chlorobenzenes by Semivolatile Chlorinated Organic Compounds Volatilization
Author(s):		Saez P; Santos A; Garcia-Cervilla R; Romero A; Lorenzo D;
Address:		"Chemical Engineering and Materials Department, Complutense University of Madrid, 28040 Madrid, Spain"
Journal Title:		Int J Environ Res Public Health
Year:		2022
Volume:		20220620
Issue:		12
Page Number:		-
DOI:		10.3390/ijerph19127547
ISSN/ISBN:		1660-4601 (Electronic) 1661-7827 (Print) 1660-4601 (Linking)
Abstract:		"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, Pv0, and activity coefficient, gamma, a correlation between Pvj0gammaj 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 degrees 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"
Keywords:		SEAR emulsion treatment chlorinated organic compounds emulsion treatment surfactant volatilization;
Notes:		"PubMed-not-MEDLINESaez, Patricia Santos, Aurora Garcia-Cervilla, Raul Romero, Arturo Lorenzo, David eng CARESOIL project (S2018/EMT-4317)/Comunidad de Madrid/ PID2019-105934RB/Ministry of Economy, Industry and Competitiveness/ LIFE17 ENV/ES/000260/EU Life Program/ Raul Garcia-Cervilla BES-2017-081782/Ministry of Economy, Industry and Competitiveness/ Switzerland 2022/06/25 Int J Environ Res Public Health. 2022 Jun 20; 19(12):7547. doi: 10.3390/ijerph19127547"