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dc.contributor.authorCabrera-Barjas, Gustavo
dc.contributor.authorGallardo, Francisco
dc.contributor.authorNesic, Aleksandra R.
dc.contributor.authorTaboada, Edelio
dc.contributor.authorMarican, Adolfo
dc.contributor.authorMirabal-Gallardo, Yaneris
dc.contributor.authorÁvila-Salas, Fabián
dc.contributor.authorDelgado, Nacarid
dc.contributor.authorde Armas-Ricard, Merly
dc.contributor.authorValdés, Oscar
dc.date.accessioned2020-10-27T13:44:22Z
dc.date.available2020-10-27T13:44:22Z
dc.date.issued2020-10
dc.identifier10.1016/j.jece.2020.104355
dc.identifier.issn22133437
dc.identifier.urihttps://hdl.handle.net/20.500.12728/7088
dc.description.abstractIn this work, Aspergillus niger and Fusarium culmorum cell wall by-products were chosen as microbial sources for chitin and chitosan production. Both polysaccharides were characterized by FTIR and 13C-CPMAS NMR, but GPC analysis was only performed for chitosan. SEM-EDX analysis was performed to fungal chitosan loaded with metal ions. Chitosan extracted from both fungus had low to medium molecular weight (Mw) and degree of deacetylations (DD) ranging from 65.7-83.3%. Fungal chitosan samples were intended to be used for bioremediation applications. For this purpose, two independent absorption experiments regarding pesticide Dimethoate (DM) and heavy metal ions (Al(III), As(III), Cd(II), Cu(II), Mg(II), Mn(II), Pb(II), Zn(II), Fe(II)) in a complex mixture were carried out. An experimental design considering the solution pH, contact time and chitosan physicochemical properties (DD) were performed. The highest percentage of dimethoate pesticide and selected metal ions absorption was obtained with highest DD chitosan, the contact time of 24 h, pH 6 for metals and pH 4 for pesticide, repectively. Molecular dynamics simulation studies allowed to analyze at the molecular level the chitosan-DM interaction. A higher number of h-bonds were identified as the main interactions that stabilize the affinity of the chitosan-DM complexes. Based on our results, we suggest the use of a multipurpose fungal chitosan system for water bioremediation.es_ES
dc.language.isoenes_ES
dc.publisherElsevier Ltdes_ES
dc.subjectAspergilluses_ES
dc.subjectBioremediationes_ES
dc.subjectChitosanes_ES
dc.subjectFusariumes_ES
dc.subjectHeavy metales_ES
dc.subjectPesticidees_ES
dc.titleUtilization of industrial by-product fungal biomass from Aspergillus niger and Fusarium culmorum to obtain biosorbents for removal of pesticide and metal ions from aqueous solutionses_ES
dc.typeArticlees_ES


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