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Obtaining of zirconium catalysts based on pillared clays for peroxide oxidation of 4-nitrophenol

2018Journal article Restricted access
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dc.contributor.authorKalmakhanova, Marzhan
dc.contributor.authorMassalimova, Bakytgul Kabykenovna
dc.contributor.authorGomes, Helder
dc.contributor.authorDíaz de Tuesta, Jose Luis
dc.contributor.authorTsoy, Irina
dc.contributor.authorAidarova, A.O.
dc.date.accessioned2019-09-03T10:23:10Z
dc.date.available2019-09-03T10:23:10Z
dc.date.issued2018
dc.description.abstractNatural resources, including abundant and cheap natural clays in the southern regionare one of the main wealth of the Republic of Kazakhstan. The chemical industry in Kazakhstanis being developedrapidly in recent years and there is an urgent need to find solutions for the treatment of wastewaters. This work aims to explore natural clays for the synthesis of low-cost pillared clays that can be used as catalysts in oxidation technologies for the treatment of wastewaters. Nitrophenols are commonly found in many types of wastewaters (plastic, pharmaceutical, paper or pesticide production).The purification of suchspecific wastewater according to classical schemes does not always ensure a safe level of pollution in waters discharged into water ponds. Thus, further development of the chemical industry will inevitably be associated with the need for more effective disposal of wastewater containing toxic products. 4-nitrophenol was used as a representative model compound in catalyst screening studies.Catalysts based on pillared clays modified with Zr4+cations were synthesized from natural clays of Karatau and Kokshetau deposits and investigated for the catalytic wastewater peroxide oxidation (CWPO) of 4-nitrophenol (4-NP) at 323 K. Pillared clays with Zr4+ showed the higher catalytic activity in the removal of 4-NP and Total organic carbon (TOC) by CWPO and selectivity for the formation of CO2 and H2O than natural clays.The best 4-NP and TOC conversion results were obtained by using the pillared clay from Karatau deposit as a catalyst. A complete removal of the contaminant was achieved after 2 hours with 97.3 % conversion.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationKalmakhanova, Marzhan; Massalimova, Baktygul; Gomes, Helder; Diaz de Tuesta, Jose Luis; Tsoy, Irina; Aidarova, A. (2018). Obtaining of zirconium catalysts based on pillared clays for peroxide oxidation of 4-nitrophenol. News of the National Academy of Sciences of the Republic of Kazakhstan-Series Chemistry and Technology. ISSN 2224-5286. 4, p. 14-21pt_PT
dc.identifier.issn2224-5286
dc.identifier.urihttp://hdl.handle.net/10198/19526
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectNatural clayspt_PT
dc.subjectPillared clayspt_PT
dc.subjectCatalytic wet peroxide oxidationpt_PT
dc.subject4-nitrophenolpt_PT
dc.subjectWastewaterpt_PT
dc.titleObtaining of zirconium catalysts based on pillared clays for peroxide oxidation of 4-nitrophenolpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage21pt_PT
oaire.citation.startPage14pt_PT
oaire.citation.titleNews of the National Academy of Sciences of the Republic of Kazakhstan, Series Chemistry and Technologypt_PT
oaire.citation.volume4pt_PT
person.familyNameGomes
person.familyNameDíaz de Tuesta
person.givenNameHelder
person.givenNameJose Luis
person.identifier.ciencia-id6218-1E19-13EE
person.identifier.ciencia-id7A1F-022B-7DBF
person.identifier.orcid0000-0001-6898-2408
person.identifier.orcid0000-0003-2408-087X
person.identifier.ridD-9785-2017
person.identifier.scopus-author-id55755821600
rcaap.rightsrestrictedAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication0eb96337-224a-4339-9918-334436fbbb99
relation.isAuthorOfPublication2ad0465f-5f8a-4b14-90f5-bf85996f9ce1
relation.isAuthorOfPublication.latestForDiscovery0eb96337-224a-4339-9918-334436fbbb99

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