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dc.creatorMilicević, Sonja
dc.creatorMilosević, Vladan
dc.creatorPovrenović, Dragan
dc.creatorStojanović, Jovica
dc.creatorMartinović, Sanja
dc.creatorBabić, Biljana M.
dc.date.accessioned2021-03-10T12:07:31Z
dc.date.available2021-03-10T12:07:31Z
dc.date.issued2013
dc.identifier.issn0009-8604
dc.identifier.urihttp://TechnoRep.tmf.bg.ac.rs/handle/123456789/2398
dc.description.abstractThe increasing levels of industrial wastewater released to the environment present a serious threat to human health, living resources, and ecological systems. Fe-modified zeolites were developed and tested for removal of Cu2+ and Zn2+ from contaminated water. The surfaces of the naturally occurring zeolite, clinoptilolite, were modified with Fe(III) oxyhydroxides using three different methods, denoted I, II, and III (FeCli(1), FeCli(2), and FeNaCli(1), respectively). The oxyhydroxides were prepared in Method I using 0.1 M FeCl3 center dot 6H(2)O in an acetate buffer (pH = 3.6); in Method II, using 10% FeCl3 center dot 6H(2)O solution in 0.1 M KOH (pH = 10); and Method III was the same as Method I except the clinoptilolite was pretreated with NaCl. Newly synthesized materials from these three methods were then tested for their ability to enhance the sorption capacity for Cu and Zn compared to the natural sample (Cli). Powder X-ray diffraction measurements and the chemical composition of these modified samples confirmed that clinoptilolite maintained its structure while amorphous Fe3+ species were synthesized. The specific surface area (BET method) of both the natural and modified clinoptilolite increased by 2 and 7.5 times for Methods I and II, respectively. Scanning electron microscopy and energy dispersive X-ray spectroscopy revealed that CaO was formed during Method I (FeCli(1)). Throughout the adsorption process, the hydrolysis of CaO and the release of OH- caused the precipitation of Cu and Zn hydroxide, which made the determination of the sorption capacity of FeCli(1) impossible. This phenomenon was avoided in Method III (FeNaCli(1)) because of the absence of exchangeable Ca2+. The adsorption experiments with Method II resulted in double-enchanced adsoprtion capacity. Laboratory batch experiments revealed that the sorption capacities increased in the following order: Cli lt FeCli(2) lt FeNaCli(1), for Cu: 0.121 mmol/g lt 0.251 mmol/g lt 0.403 mmol/g and for Zn: 0.128 mmol/g lt 0.234 mmol/g lt 0.381 mmol/g.en
dc.publisherClay Minerals Soc, Chantilly
dc.relationinfo:eu-repo/grantAgreement/MESTD/Technological Development (TD or TR)/33007/RS//
dc.rightsrestrictedAccess
dc.sourceClays and Clay Minerals
dc.subjectCopperen
dc.subjectFe-modificationen
dc.subjectSorption Capacityen
dc.subjectZeoliteen
dc.subjectZincen
dc.titleRemoval of heavy metals from aqueous solution using natural and fe(iii) oxyhydroxide clinoptiloliteen
dc.typearticle
dc.rights.licenseARR
dc.citation.epage516
dc.citation.issue6
dc.citation.other61(6): 508-516
dc.citation.rankM22
dc.citation.spage508
dc.citation.volume61
dc.identifier.doi10.1346/CCMN.2013.0610603
dc.identifier.rcubconv_4493
dc.identifier.scopus2-s2.0-84902197797
dc.identifier.wos000339789500003
dc.type.versionpublishedVersion


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