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

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dc.contributor.authorCheca Fernández, Cristina Alicia
dc.contributor.authorSantos López, Aurora
dc.contributor.authorRomero Salvador, Arturo
dc.contributor.authorDomínguez Torre, Carmen María
dc.date.accessioned2024-06-19T12:00:18Z
dc.date.available2024-06-19T12:00:18Z
dc.date.issued2023
dc.description.abstractThe 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.
dc.description.departmentDepto. de Ingeniería Química y de Materiales
dc.description.facultyFac. de Ciencias Químicas
dc.description.fundingtypeAPC financiada por la UCM
dc.description.refereedTRUE
dc.description.sponsorshipMinisterio de Ciencia
dc.description.statuspub
dc.identifier.citationAlicia Checa-Fernández, Aurora Santos, Arturo Romero, Carmen M. Domínguez, Remediation of real soils polluted with pesticides by activated persulfate and surfactant addition, Journal of Water Process Engineering, Volume 53, 2023, 103829, ISSN 2214-7144, https://doi.org/10.1016/j.jwpe.2023.103829. (https://www.sciencedirect.com/science/article/pii/S2214714423003483)
dc.identifier.doi10.1016/j.jwpe.2023.103829
dc.identifier.issn2214-7144
dc.identifier.officialurlhttps://doi.org/10.1016/j.jwpe.2023.103829
dc.identifier.relatedurlhttps://www.sciencedirect.com/science/article/pii/S2214714423003483
dc.identifier.urihttps://hdl.handle.net/20.500.14352/105098
dc.journal.titleJournal of Water Process Engineering
dc.language.isoeng
dc.publisherElsevier
dc.relation.projectIDPID2019-105934RB-I00
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internationalen
dc.rights.accessRightsopen access
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subject.cdu628.3
dc.subject.keywordRemediation
dc.subject.keywordHCHs
dc.subject.keywordSurfactants
dc.subject.keywordPartition coefficient
dc.subject.keywordActivated persulfate
dc.subject.ucmResiduos
dc.subject.unesco3308.07 Eliminación de Residuos
dc.titleRemediation of real soils polluted with pesticides by activated persulfate and surfactant addition
dc.typejournal article
dc.type.hasVersionVoR
dc.volume.number53
dspace.entity.typePublication
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