Show simple item record

dc.creatorPetrović, Marija
dc.creatorŠoštarić, Tatjana
dc.creatorStojanović, Mirjana
dc.creatorPetrović, Jelena
dc.creatorMihajlović, Marija
dc.creatorĆosović, Aleksandar
dc.creatorStanković, Slavka
dc.date.accessioned2021-03-10T13:29:28Z
dc.date.available2021-03-10T13:29:28Z
dc.date.issued2017
dc.identifier.issn0925-8574
dc.identifier.urihttp://TechnoRep.tmf.bg.ac.rs/handle/123456789/3670
dc.description.abstractIn this study the novel biosorbent - raw corn silk (CS) was investigated for Cu2+ and Zn2+ removal from aqueous solutions. The physical and chemical properties of CS were determined by SEM - EDX and ATR - FTIR techniques. The SEM micrographs revealed that surface morphology of CS is suitable for metal adsorption, while FTIR analysis confirmed presence of various active groups (O-H, C-O, C-O C, C=C and amide II) which could interact with metal ions. The adsorption experiments were performed in batch system. Experimental data were fitted by pseudo - first order and pseudo - second order kinetic models as well as Langmuir and Freundlich isotherm models. Biosorption of the both metals follow pseudo second order kinetic model. The best fitting adsorption model is Langmuir model and the maximum biosorption capacities (q(max)) for Cu2+ and Zn2+ at 313 K and pH 5.0 were 15.35 mg g(-1) and 13.98 mg g(-1), respectively. The thermodynamic parameters such as Gibbs free energy change (Delta G), enthalpy change (Delta H) and entropy change (Delta S) were studied at different metal concentration and three temperatures. According to thermodynamic study, the biosorption process for both metals is feasible, endothermic and spontaneous. According to thermodynamic study, the biosorption process for both metals is feasible, endothermic and spontaneous. Ion - exchange is the dominant mechanism in adsorption of Cu2+ and Zn2+ on the CS with a certain degree of complexation. Desorption study was performed in three adsorption/desorption cycles with diluted nitric acid. Results show that after metal adsorption CS can be efficiently recovered and reused for new adsorption process. Obtained results indicated that corn silk could be used as efficient novel biosorbent for Cu2+ and Zn2+ removal from water samples.en
dc.publisherElsevier, Amsterdam
dc.relationinfo:eu-repo/grantAgreement/MESTD/Technological Development (TD or TR)/31003/RS//
dc.rightsrestrictedAccess
dc.sourceEcological Engineering
dc.subjectCorn silken
dc.subjectCopperen
dc.subjectZincen
dc.subjectAdsorptionen
dc.subjectMechanismen
dc.subjectDesorptionen
dc.titleMechanism of adsorption of Cu2+ and Zn2+ on the corn silk (Zea mays L.)en
dc.typearticle
dc.rights.licenseARR
dc.citation.epage90
dc.citation.other99: 83-90
dc.citation.rankM21
dc.citation.spage83
dc.citation.volume99
dc.identifier.doi10.1016/j.ecoleng.2016.11.057
dc.identifier.rcubconv_5195
dc.identifier.scopus2-s2.0-84996524411
dc.identifier.wos000391838600009
dc.type.versionpublishedVersion


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record