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dc.contributor.author
Checa Fernández, Alicia
dc.contributor.author
Santos, Aurora
dc.contributor.author
Conte, Leandro Oscar
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dc.contributor.author
Romero, Arturo
dc.contributor.author
Domínguez, Carmen M.
dc.date.available
2023-11-07T12:55:18Z
dc.date.issued
2022-07
dc.identifier.citation
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
dc.identifier.issn
1385-8947
dc.identifier.uri
http://hdl.handle.net/11336/217276
dc.description.abstract
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.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier Science SA
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc/2.5/ar/
dc.subject
ALKALINE ACTIVATION
dc.subject
HCHS
dc.subject
PERSULFATE
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SOIL REMEDIATION
dc.subject
ULTRASOUND
dc.subject.classification
Otras Ingeniería del Medio Ambiente
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dc.subject.classification
Ingeniería del Medio Ambiente
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dc.subject.classification
INGENIERÍAS Y TECNOLOGÍAS
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dc.title
Enhanced remediation of a real HCH-polluted soil by the synergetic alkaline and ultrasonic activation of persulfate
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2023-11-06T15:31:01Z
dc.journal.volume
440
dc.journal.pagination
1-10
dc.journal.pais
Países Bajos
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dc.journal.ciudad
Amsterdam
dc.description.fil
Fil: Checa Fernández, Alicia. Universidad Complutense de Madrid; España
dc.description.fil
Fil: Santos, Aurora. Universidad Complutense de Madrid; España
dc.description.fil
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
dc.description.fil
Fil: Romero, Arturo. Universidad Complutense de Madrid; España
dc.description.fil
Fil: Domínguez, Carmen M.. Universidad Complutense de Madrid; España
dc.journal.title
Chemical Engineering Journal
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.cej.2022.135901
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