Remediation of real soils polluted with pesticides by activated persulfate and surfactant addition

The existence of soils contaminated with organochlorine pesticides represents a serious environmental problem. In this work, a real soil contaminated with hexachlorocyclohexanes (ΣHCH = 373 mg kg−1), persistent organic pollutants included in the Stockholm Convention, was remediated. Surfactants were...

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Detalles Bibliográficos
Autores: Checa Fernández, Cristina Alicia, Santos López, Aurora, Romero Salvador, Arturo, Domínguez Torre, Carmen María
Tipo de recurso: artículo
Fecha de publicación:2023
País:España
Institución:Universidad Complutense de Madrid (UCM)
Repositorio:Docta Complutense
Idioma:inglés
OAI Identifier:oai:docta.ucm.es:20.500.14352/105098
Acceso en línea:https://hdl.handle.net/20.500.14352/105098
Access Level:acceso abierto
Palabra clave:628.3
Remediation
HCHs
Surfactants
Partition coefficient
Activated persulfate
Residuos
3308.07 Eliminación de Residuos
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spelling Remediation of real soils polluted with pesticides by activated persulfate and surfactant additionCheca Fernández, Cristina AliciaSantos López, AuroraRomero Salvador, ArturoDomínguez Torre, Carmen María628.3RemediationHCHsSurfactantsPartition coefficientActivated persulfateResiduos3308.07 Eliminación de ResiduosThe existence of soils contaminated with organochlorine pesticides represents a serious environmental problem. In this work, a real soil contaminated with hexachlorocyclohexanes (ΣHCH = 373 mg kg−1), persistent organic pollutants included in the Stockholm Convention, was remediated. Surfactants were used to enhance the pollutants solubilization and activated persulfate (PS) oxidation to degrade the pollutants. Solubilization experiments were performed to evaluate the effect of surfactant (sodium dodecyl sulfate (SDS), Emulse-3® (E3) and Tween-80® (T80)), pH, reagents addition order and concentration (Csurfactant = 0–10 g L−1, CNaOH = 0–13.5 g L−1). Surfactants selection was performed attending to their ability to solubilize chlorinated organic compounds (COCs). The use of surfactants improved COCs solubilization, especially at pH > 12; conditions at which HCHs hydrolyze to trichlorobenzenes (TCBs), with higher solubility. The higher the surfactant concentration, the higher the COCs concentration in the emulsion. COCs solubilization of 83 % and 89 % were achieved in three surfactant consecutive cycles at highly alkaline conditions using SDS and E3, respectively (T80 was unstable). The resulting emulsions were treated by PS activated by alkali and intensified by temperature. COCs conversion of 30 % and 96 % were achieved when treating E3 and SDS-emulsions (72 h), respectively, highlighting the suitability of SDS for the integrated process.ElsevierUniversidad Complutense de Madrid20232023-01-0120232023-01-01journal articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/105098reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2Attribution-NonCommercial-NoDerivatives 4.0 Internationalhttp://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/1050982026-06-02T12:44:21Z
dc.title.none.fl_str_mv Remediation of real soils polluted with pesticides by activated persulfate and surfactant addition
title Remediation of real soils polluted with pesticides by activated persulfate and surfactant addition
spellingShingle Remediation of real soils polluted with pesticides by activated persulfate and surfactant addition
Checa Fernández, Cristina Alicia
628.3
Remediation
HCHs
Surfactants
Partition coefficient
Activated persulfate
Residuos
3308.07 Eliminación de Residuos
title_short Remediation of real soils polluted with pesticides by activated persulfate and surfactant addition
title_full Remediation of real soils polluted with pesticides by activated persulfate and surfactant addition
title_fullStr Remediation of real soils polluted with pesticides by activated persulfate and surfactant addition
title_full_unstemmed Remediation of real soils polluted with pesticides by activated persulfate and surfactant addition
title_sort Remediation of real soils polluted with pesticides by activated persulfate and surfactant addition
dc.creator.none.fl_str_mv Checa Fernández, Cristina Alicia
Santos López, Aurora
Romero Salvador, Arturo
Domínguez Torre, Carmen María
author Checa Fernández, Cristina Alicia
author_facet Checa Fernández, Cristina Alicia
Santos López, Aurora
Romero Salvador, Arturo
Domínguez Torre, Carmen María
author_role author
author2 Santos López, Aurora
Romero Salvador, Arturo
Domínguez Torre, Carmen María
author2_role author
author
author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv 628.3
Remediation
HCHs
Surfactants
Partition coefficient
Activated persulfate
Residuos
3308.07 Eliminación de Residuos
topic 628.3
Remediation
HCHs
Surfactants
Partition coefficient
Activated persulfate
Residuos
3308.07 Eliminación de Residuos
description The existence of soils contaminated with organochlorine pesticides represents a serious environmental problem. In this work, a real soil contaminated with hexachlorocyclohexanes (ΣHCH = 373 mg kg−1), persistent organic pollutants included in the Stockholm Convention, was remediated. Surfactants were used to enhance the pollutants solubilization and activated persulfate (PS) oxidation to degrade the pollutants. Solubilization experiments were performed to evaluate the effect of surfactant (sodium dodecyl sulfate (SDS), Emulse-3® (E3) and Tween-80® (T80)), pH, reagents addition order and concentration (Csurfactant = 0–10 g L−1, CNaOH = 0–13.5 g L−1). Surfactants selection was performed attending to their ability to solubilize chlorinated organic compounds (COCs). The use of surfactants improved COCs solubilization, especially at pH > 12; conditions at which HCHs hydrolyze to trichlorobenzenes (TCBs), with higher solubility. The higher the surfactant concentration, the higher the COCs concentration in the emulsion. COCs solubilization of 83 % and 89 % were achieved in three surfactant consecutive cycles at highly alkaline conditions using SDS and E3, respectively (T80 was unstable). The resulting emulsions were treated by PS activated by alkali and intensified by temperature. COCs conversion of 30 % and 96 % were achieved when treating E3 and SDS-emulsions (72 h), respectively, highlighting the suitability of SDS for the integrated process.
publishDate 2023
dc.date.none.fl_str_mv 2023
2023-01-01
2023
2023-01-01
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/20.500.14352/105098
url https://hdl.handle.net/20.500.14352/105098
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution-NonCommercial-NoDerivatives 4.0 International
http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution-NonCommercial-NoDerivatives 4.0 International
http://creativecommons.org/licenses/by-nc-nd/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:Docta Complutense
instname:Universidad Complutense de Madrid (UCM)
instname_str Universidad Complutense de Madrid (UCM)
reponame_str Docta Complutense
collection Docta Complutense
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,81155

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