Utilization of industrial by-product fungal biomass from Aspergillus niger and Fusarium culmorum to obtain biosorbents for removal of pesticide and metal ions from aqueous solutions

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dc.contributor.authorCabrera Barjas, Gustavo
dc.contributor.authorGallardo, Francisco
dc.contributor.authorNesic, Aleksandra
dc.contributor.authorTaboada Valdés, Edelio
dc.contributor.authorMarican, Adolfo
dc.contributor.authorMirabal Gallardo, Yaneris
dc.contributor.authorAvila Salas, Fabian
dc.contributor.authorDelgado, Nacarid
dc.contributor.authorde Armas Ricard, Merly
dc.contributor.authorValdes, Oscar
dc.date2020
dc.date.accessioned2021-04-30T17:06:08Z
dc.date.available2021-04-30T17:06:08Z
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 C-13-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.
dc.identifier.citationJOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING,Vol.8,,2020
dc.identifier.doi10.1016/j.jece.2020.104355
dc.identifier.urihttp://repositoriodigital.uct.cl/handle/10925/4053
dc.language.isoen
dc.publisherELSEVIER SCI LTD
dc.sourceJOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
dc.subject.englishChitosan
dc.subject.englishAspergillus
dc.subject.englishFusarium
dc.subject.englishPesticide
dc.subject.englishHeavy metal
dc.subject.englishBioremediation
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 solutions
dc.typeArticle
uct.catalogadorWOS
uct.indizacionSCI
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