Clay-based catalyst synthesized for chemical oxidation of phenanthrene contaminated soil using hydrogen peroxide and persulfate

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dc.contributor.authorChiavone Filho, Osvaldo
dc.contributor.authorMagalhães, Vivian Maria de Arruda
dc.contributor.authorMendes, Gabriela Paupitz
dc.contributor.authorCosta Filho, José Daladiê Barreto da
dc.contributor.authorCohen, Renato
dc.contributor.authorPartiti, Carmem S. M.
dc.contributor.authorVianna, Marilda M. G. Ramos
dc.date.accessioned2021-11-10T12:14:13Z
dc.date.issued2020-04
dc.description.embargo2030-12
dc.description.resumoHydrocarbon contaminated sites are a critical issue. Soil is a complex substrate and its heterogeneity makes soil remediation a difficult task. Studies involving in situ chemical oxidation focusing on soil remediation are scarce in literature. Heterogeneous catalysts for oxidation process can be supported in clays. In this work, different claybased catalysts were synthesized. Concentrations of sodium hydroxide (NaOH), ferrous sulfate (FeSO4), and ferric sulfate (Fe3(SO4)2) were varied in accordance with a 23 experimental design. Modified clay catalysts (MCC) were applied in oxidation assays of phenanthrene (PHE) contaminated soil to evaluate the activation of two oxidants: sodium persulfate (SP) and hydrogen peroxide (HP). The experimental design response was the PHE removal. Most of the catalysts proved to be efficient in activating both oxidants and achieved around 80 % of PHE removal. Control assays showed that around 20 % of PHE can be naturally transferred from soil to the liquid phase. PHE removal did not occur during oxidation with raw clay (RC). The highest PHE removal was obtained using MCC 16 with HP, reaching 83 %. XRF analysis of MCC 16 indicated an increase of 160 % in iron content and the Mössbauer spectroscopy showed higher values of relative Fe3+ doublet area for MCC 16 than for RC. BET surface area measurements and scanning electron microscopy analysis suggested the impregnation of iron minerals on the MCC 16 surface. The catalyst proposed in this study can be applied in both in situ or ex situ remediation circumstances, reducing the environmental effects of organic contaminantspt_BR
dc.identifier.citationMAGALHÃES, VIVIAN M.A.; MENDES, GABRIELA P.; COSTA-FILHO, JOSÉ DALADIÊ B.; COHEN, RENATO; PARTITI, CARMEM S.M.; VIANNA, MARILDA M.G.R.; CHIAVONE-FILHO, OSVALDO. Clay-based catalyst synthesized for chemical oxidation of phenanthrene contaminated soil using hydrogen peroxide and persulfate. JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING, v. 8, p. 103568-103578, 2020. Disponível em: https://www.sciencedirect.com/science/article/abs/pii/S2213343719306918?via%3Dihub Acesso em: 14 jun. 2021. https://doi.org/10.1016/j.jece.2019.103568.pt_BR
dc.identifier.doi10.1016/j.jece.2019.103568
dc.identifier.issn2213-3437
dc.identifier.urihttps://repositorio.ufrn.br/handle/123456789/44863
dc.languageenpt_BR
dc.publisherElsevierpt_BR
dc.subjectAdvanced oxidation processpt_BR
dc.subjectHeterogeneous catalysispt_BR
dc.subjectIron impregnationpt_BR
dc.subjectSoil remediationpt_BR
dc.subjectPolycyclic aromatic hydrocarbonpt_BR
dc.subjectExperimental designpt_BR
dc.titleClay-based catalyst synthesized for chemical oxidation of phenanthrene contaminated soil using hydrogen peroxide and persulfatept_BR
dc.typearticlept_BR

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