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dc.creatorDolic, Maja B.
dc.creatorRajakovic-Ognjanovic, Vladana N.
dc.creatorŠtrbac, Svetlana
dc.creatorDimitrijević, Suzana I.
dc.creatorMitrić, Miodrag
dc.creatorOnjia, Antonije E.
dc.creatorRajaković, Ljubinka V.
dc.date.accessioned2019-01-30T17:54:38Z
dc.date.available2019-01-30T17:54:38Z
dc.date.issued2017
dc.identifier.issn1871-6784
dc.identifier.urihttp://cer.ihtm.bg.ac.rs/handle/123456789/2158
dc.description.abstractThe objective of this study was to investigate the modification of materials used in wastewater treatment for possible antimicrobial application(s). Granulated activated carbon (GAC) and natural clinoptilolite (CLI) were activated using Cu2+-and Zn2+-ions and the disinfection ability of the resulting materials was tested. Studies of the sorption and desorption kinetics were performed in order to determine and clarify the antimicrobial activity of the metal-activated sorbents. The exact sorption capacities of the selected sorbents, GAC and CLI, activated through use of Cu2+-ions, were 15.90 and 3.60 mg/g, respectively, while for the materials activated by Zn2+-ions, the corresponding capacities were 14.00 and 4.72 mg/g,. The desorption rates were 2 and 3 orders of magnitude lower than their sorption efficacy for the Cu2+-, and Zn2+-activated sorbents, respectively. The intermediate sorption capacity and low desorption rate indicated that the overall antimicrobial activity of the metal-modified sorbents was a result of metal ions immobilized onto surface sites. The effect of antimicrobial activity of free ions desorbed from the metal-activated surface may thus be disregarded. The antimicrobial activities of Cu/GAC, Zn/GAC, Cu/CLI and Zn/ CLI were also tested against Escherichia coli, Staphylococcus aureus, and Candida albicans. After 15 min exposure, the highest levels of cell inactivation were obtained through the Cu/CLI and the Cu/GAC against E. coli, 100.0 and 98.24%, respectively. However, for S. aureus and yeast cell inactivation, all Cu2+-and Zn2+-activated sorbents proved to be unsatisfactory. A characterization of the sorbents was performed by Xray diffraction (XRD), X-ray photo electron spectroscopy (XPS), and field emission scanning electron microscopy (FE-SEM). A concentration of the adsorbed and released ions was determined by inductively coupled plasma-optical emission spectroscopy (ICP-OES) and mass spectrometry (ICP-MS). The results showed that the antimicrobial performance of the activated sorbents depended on the surface characteristics of the material, which itself designates the distribution and the bioavailability of the activating agent.en
dc.publisherElsevier Science Bv, Amsterdam
dc.relationinfo:eu-repo/grantAgreement/MESTD/Integrated and Interdisciplinary Research (IIR or III)/43009/RS//
dc.relationSTSM Grant from COST Action [BM1403]
dc.relationCMST COST Action Emergence and Evolution of Complex Chemical Systems - CM1304
dc.rightsrestrictedAccess
dc.sourceNew Biotechnology
dc.subjectActivated sorbenten
dc.subjectAntimicrobial activityen
dc.subjectE. colien
dc.subjectS. aureusen
dc.subjectC. albicansen
dc.titleNatural sorbents modified by divalent Cu2+- and Zn2+- ions and their corresponding antimicrobial activityen
dc.typearticle
dc.rights.licenseARR
dcterms.abstractДимитријевић, Сузана И.; Рајаковиц-Огњановиц, Владана Н.; Долиц, Маја Б.; Оњиа, Aнтоније Е.; Рајаковиц, Љубинка В.; Митрић, Миодраг; Штрбац, Светлана;
dc.citation.volume39
dc.citation.spage150
dc.citation.epage159
dc.citation.other39: 150-159
dc.citation.rankM21
dc.description.otherThe peer-reviewed version: [http://cer.ihtm.bg.ac.rs/handle/123456789/3030]
dc.identifier.pmid28263898
dc.identifier.doi10.1016/j.nbt.2017.03.001
dc.identifier.rcubConv_3802
dc.identifier.scopus2-s2.0-85015322654
dc.identifier.wos000410912900018
dc.type.versionpublishedVersion


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