Enhanced remediation of a real HCH-polluted soil by the synergetic alkaline and ultrasonic activation of persulfate

Autores
Checa Fernández, Alicia; Santos, Aurora; Conte, Leandro Oscar; Romero, Arturo; Domínguez, Carmen M.
Año de publicación
2022
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The desorption of hydrophobic organic compounds (HOCs) and limited mass transfer in soil systems is a significant challenge for efficient soil remediation by oxidation treatments. The utilization of sonochemistry is a promising technology to enhance the decontamination of HOCs-polluted soils. In this work, ultrasound (US) was coupled to NaOH for activating persulfate (PS) to enhance the remediation of a real soil polluted with hexachlorocyclohexanes (HCHs) (ΣHCHs = 404 mg kg−1). Batch experiments (mass aqueous/soil ratio, VL/WS = 2) were performed to evaluate the effect of US on HOCs desorption and oxidation. Moreover, the influence of US power (0–245 W, corresponding to 0–91 W L-1 of US power density) and the initial oxidant concentration (CPS = 10–60 g L-1) on pollutants abatement, dechlorination degree, and oxidant consumption have been studied. Scanning electron microscopy (SEM) images verified that the US facilitates the breakdown of soil aggregates, enhancing the desorption of trichlorobenzenes (TCBs) (generated from HCHs alkaline hydrolysis) from the soil. Moreover, their subsequent oxidation is favouring because of higher radical species concentrations and the temperature rise. An increase in the US power up to 165 W accelerates the production rate of radicals, improving the pollutants’ degradation. The difference between pollutant oxidation and dechlorination decreases with increasing US power, associated with a lower concentration of intermediate chlorinated compounds. In the same way, the initial oxidant concentration plays a fundamental role in the remediation treatment. At the selected operating conditions (CPS = 60 g L-1, NaOH/PS = 2, 165 W), a pollutants degradation and dechlorination of 0.94 and 0.74, respectively, were achieved in just 3 h of reaction time.
Fil: Checa Fernández, Alicia. Universidad Complutense de Madrid; España
Fil: Santos, Aurora. Universidad Complutense de Madrid; España
Fil: Conte, Leandro Oscar. Universidad Complutense de Madrid; España. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; Argentina
Fil: Romero, Arturo. Universidad Complutense de Madrid; España
Fil: Domínguez, Carmen M.. Universidad Complutense de Madrid; España
Materia
ALKALINE ACTIVATION
HCHS
PERSULFATE
SOIL REMEDIATION
ULTRASOUND
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/217276
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/217276
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Enhanced remediation of a real HCH-polluted soil by the synergetic alkaline and ultrasonic activation of persulfateCheca Fernández, AliciaSantos, AuroraConte, Leandro OscarRomero, ArturoDomínguez, Carmen M.ALKALINE ACTIVATIONHCHSPERSULFATESOIL REMEDIATIONULTRASOUNDhttps://purl.org/becyt/ford/2.7https://purl.org/becyt/ford/2The desorption of hydrophobic organic compounds (HOCs) and limited mass transfer in soil systems is a significant challenge for efficient soil remediation by oxidation treatments. The utilization of sonochemistry is a promising technology to enhance the decontamination of HOCs-polluted soils. In this work, ultrasound (US) was coupled to NaOH for activating persulfate (PS) to enhance the remediation of a real soil polluted with hexachlorocyclohexanes (HCHs) (ΣHCHs = 404 mg kg−1). Batch experiments (mass aqueous/soil ratio, VL/WS = 2) were performed to evaluate the effect of US on HOCs desorption and oxidation. Moreover, the influence of US power (0–245 W, corresponding to 0–91 W L-1 of US power density) and the initial oxidant concentration (CPS = 10–60 g L-1) on pollutants abatement, dechlorination degree, and oxidant consumption have been studied. Scanning electron microscopy (SEM) images verified that the US facilitates the breakdown of soil aggregates, enhancing the desorption of trichlorobenzenes (TCBs) (generated from HCHs alkaline hydrolysis) from the soil. Moreover, their subsequent oxidation is favouring because of higher radical species concentrations and the temperature rise. An increase in the US power up to 165 W accelerates the production rate of radicals, improving the pollutants’ degradation. The difference between pollutant oxidation and dechlorination decreases with increasing US power, associated with a lower concentration of intermediate chlorinated compounds. In the same way, the initial oxidant concentration plays a fundamental role in the remediation treatment. At the selected operating conditions (CPS = 60 g L-1, NaOH/PS = 2, 165 W), a pollutants degradation and dechlorination of 0.94 and 0.74, respectively, were achieved in just 3 h of reaction time.Fil: Checa Fernández, Alicia. Universidad Complutense de Madrid; EspañaFil: Santos, Aurora. Universidad Complutense de Madrid; EspañaFil: Conte, Leandro Oscar. Universidad Complutense de Madrid; España. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; ArgentinaFil: Romero, Arturo. Universidad Complutense de Madrid; EspañaFil: Domínguez, Carmen M.. Universidad Complutense de Madrid; EspañaElsevier Science SA2022-07info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/217276Checa Fernández, Alicia; Santos, Aurora; Conte, Leandro Oscar; Romero, Arturo; Domínguez, Carmen M.; Enhanced remediation of a real HCH-polluted soil by the synergetic alkaline and ultrasonic activation of persulfate; Elsevier Science SA; Chemical Engineering Journal; 440; 7-2022; 1-101385-8947CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.cej.2022.135901info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T10:01:01Zoai:ri.conicet.gov.ar:11336/217276instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-03 10:01:01.668CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Enhanced remediation of a real HCH-polluted soil by the synergetic alkaline and ultrasonic activation of persulfate
title Enhanced remediation of a real HCH-polluted soil by the synergetic alkaline and ultrasonic activation of persulfate
spellingShingle Enhanced remediation of a real HCH-polluted soil by the synergetic alkaline and ultrasonic activation of persulfate
Checa Fernández, Alicia
ALKALINE ACTIVATION
HCHS
PERSULFATE
SOIL REMEDIATION
ULTRASOUND
title_short Enhanced remediation of a real HCH-polluted soil by the synergetic alkaline and ultrasonic activation of persulfate
title_full Enhanced remediation of a real HCH-polluted soil by the synergetic alkaline and ultrasonic activation of persulfate
title_fullStr Enhanced remediation of a real HCH-polluted soil by the synergetic alkaline and ultrasonic activation of persulfate
title_full_unstemmed Enhanced remediation of a real HCH-polluted soil by the synergetic alkaline and ultrasonic activation of persulfate
title_sort Enhanced remediation of a real HCH-polluted soil by the synergetic alkaline and ultrasonic activation of persulfate
dc.creator.none.fl_str_mv Checa Fernández, Alicia
Santos, Aurora
Conte, Leandro Oscar
Romero, Arturo
Domínguez, Carmen M.
author Checa Fernández, Alicia
author_facet Checa Fernández, Alicia
Santos, Aurora
Conte, Leandro Oscar
Romero, Arturo
Domínguez, Carmen M.
author_role author
author2 Santos, Aurora
Conte, Leandro Oscar
Romero, Arturo
Domínguez, Carmen M.
author2_role author
author
author
author
dc.subject.none.fl_str_mv ALKALINE ACTIVATION
HCHS
PERSULFATE
SOIL REMEDIATION
ULTRASOUND
topic ALKALINE ACTIVATION
HCHS
PERSULFATE
SOIL REMEDIATION
ULTRASOUND
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.7
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv The desorption of hydrophobic organic compounds (HOCs) and limited mass transfer in soil systems is a significant challenge for efficient soil remediation by oxidation treatments. The utilization of sonochemistry is a promising technology to enhance the decontamination of HOCs-polluted soils. In this work, ultrasound (US) was coupled to NaOH for activating persulfate (PS) to enhance the remediation of a real soil polluted with hexachlorocyclohexanes (HCHs) (ΣHCHs = 404 mg kg−1). Batch experiments (mass aqueous/soil ratio, VL/WS = 2) were performed to evaluate the effect of US on HOCs desorption and oxidation. Moreover, the influence of US power (0–245 W, corresponding to 0–91 W L-1 of US power density) and the initial oxidant concentration (CPS = 10–60 g L-1) on pollutants abatement, dechlorination degree, and oxidant consumption have been studied. Scanning electron microscopy (SEM) images verified that the US facilitates the breakdown of soil aggregates, enhancing the desorption of trichlorobenzenes (TCBs) (generated from HCHs alkaline hydrolysis) from the soil. Moreover, their subsequent oxidation is favouring because of higher radical species concentrations and the temperature rise. An increase in the US power up to 165 W accelerates the production rate of radicals, improving the pollutants’ degradation. The difference between pollutant oxidation and dechlorination decreases with increasing US power, associated with a lower concentration of intermediate chlorinated compounds. In the same way, the initial oxidant concentration plays a fundamental role in the remediation treatment. At the selected operating conditions (CPS = 60 g L-1, NaOH/PS = 2, 165 W), a pollutants degradation and dechlorination of 0.94 and 0.74, respectively, were achieved in just 3 h of reaction time.
Fil: Checa Fernández, Alicia. Universidad Complutense de Madrid; España
Fil: Santos, Aurora. Universidad Complutense de Madrid; España
Fil: Conte, Leandro Oscar. Universidad Complutense de Madrid; España. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; Argentina
Fil: Romero, Arturo. Universidad Complutense de Madrid; España
Fil: Domínguez, Carmen M.. Universidad Complutense de Madrid; España
description The desorption of hydrophobic organic compounds (HOCs) and limited mass transfer in soil systems is a significant challenge for efficient soil remediation by oxidation treatments. The utilization of sonochemistry is a promising technology to enhance the decontamination of HOCs-polluted soils. In this work, ultrasound (US) was coupled to NaOH for activating persulfate (PS) to enhance the remediation of a real soil polluted with hexachlorocyclohexanes (HCHs) (ΣHCHs = 404 mg kg−1). Batch experiments (mass aqueous/soil ratio, VL/WS = 2) were performed to evaluate the effect of US on HOCs desorption and oxidation. Moreover, the influence of US power (0–245 W, corresponding to 0–91 W L-1 of US power density) and the initial oxidant concentration (CPS = 10–60 g L-1) on pollutants abatement, dechlorination degree, and oxidant consumption have been studied. Scanning electron microscopy (SEM) images verified that the US facilitates the breakdown of soil aggregates, enhancing the desorption of trichlorobenzenes (TCBs) (generated from HCHs alkaline hydrolysis) from the soil. Moreover, their subsequent oxidation is favouring because of higher radical species concentrations and the temperature rise. An increase in the US power up to 165 W accelerates the production rate of radicals, improving the pollutants’ degradation. The difference between pollutant oxidation and dechlorination decreases with increasing US power, associated with a lower concentration of intermediate chlorinated compounds. In the same way, the initial oxidant concentration plays a fundamental role in the remediation treatment. At the selected operating conditions (CPS = 60 g L-1, NaOH/PS = 2, 165 W), a pollutants degradation and dechlorination of 0.94 and 0.74, respectively, were achieved in just 3 h of reaction time.
publishDate 2022
dc.date.none.fl_str_mv 2022-07
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/217276
Checa Fernández, Alicia; Santos, Aurora; Conte, Leandro Oscar; Romero, Arturo; Domínguez, Carmen M.; Enhanced remediation of a real HCH-polluted soil by the synergetic alkaline and ultrasonic activation of persulfate; Elsevier Science SA; Chemical Engineering Journal; 440; 7-2022; 1-10
1385-8947
CONICET Digital
CONICET
url http://hdl.handle.net/11336/217276
identifier_str_mv Checa Fernández, Alicia; Santos, Aurora; Conte, Leandro Oscar; Romero, Arturo; Domínguez, Carmen M.; Enhanced remediation of a real HCH-polluted soil by the synergetic alkaline and ultrasonic activation of persulfate; Elsevier Science SA; Chemical Engineering Journal; 440; 7-2022; 1-10
1385-8947
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1016/j.cej.2022.135901
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier Science SA
publisher.none.fl_str_mv Elsevier Science SA
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.13397

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