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Reactions of calcite in water in the presence of stearic acid

dc.creatorMihajlović, Slavica
dc.creatorSekulić, Živko
dc.creatorKolonja, Božo M.
dc.creatorRadulović, Dragan
dc.date.accessioned2023-04-21T11:22:15Z
dc.date.available2023-04-21T11:22:15Z
dc.date.issued2015
dc.identifier.issn2334-8836
dc.identifier.urihttps://ritnms.itnms.ac.rs/handle/123456789/340
dc.description.abstractU suspenziji kalcita i vode, čiji je pH 10,14, na granici kalcit/voda formirao se dvojni električni sloj. Njegova struktura, odnosno hidrofilne osobine minerala, su zavisile od koncentracije potencijal određujućih jona, Ca2+ i 2 CO 3 , pH sredine i adsorpcije molekula vode i jona (i molekula) formiranih u suspenziji kalcita usled njegove rastvorljivosti u alkalnoj sredini. Struktura tako formiranog dvojnog električnog sloja je uticala na interakciju minerala sa stearinskom kiselinom kao površinski aktivnom materijom. U prisustvu stearinske kiseline pH vrednost suspenzije je opadala do 8,72 zbog disocijacije stearinske kiseline u alkalnoj sredini i reakcije neutralizacije. Kao posledica disocijacije u suspenziji su se pored nedisosovanih molekula kiseline nalazili u određenoj koncentraciji i stearatni joni CH3(CH2)16COO-, (St-) koji su reagovali sa površinom minerala prevodeći je iz hidrofilne u hidrofobnu.sr
dc.description.abstractIn the suspension of water and calcite, with pH 10.14, on the border of calcite / water was formed a double electric layer. Its structure, or hydrophilic properties of minerals, depended on the concentration of potential determination ions, Ca2+ i 2 CO3 , pH of the environment, and the adsorption of water molecules and ions (and molecules), formed in a suspension of calcite as a result of its solubility in alkaline media. The structure of such a way formed electrical double layer, influenced on interaction of minerals with stearic acid as a surface of active substance. In the presence of stearic acid, the pH value of slurry decreased to 8.72 due to the dissociation of stearic acid in alkaline medium and reaction of neutralization. As the result of dissociation, in the suspension, besides the un-dissociated acid molecules, there were also stearine ions CH3(CH2)16COO-, (St-), which have reacted with the surface of minerals, transforming it from hydrophilic to hydrophobic.en
dc.publisherInstitut za rudarstvo i metalurgiju, Bor
dc.relationinfo:eu-repo/grantAgreement/MESTD/Technological Development (TD or TR)/34013/RS//
dc.relationinfo:eu-repo/grantAgreement/MESTD/Technological Development (TD or TR)/34006/RS//
dc.rightsopenAccess
dc.sourceMining and Metallurgy Engineering Bor
dc.subjectstearinska kiselinasr
dc.subjectrastvorljivostsr
dc.subjectkalcitsr
dc.subjectdvojni električni slojsr
dc.subjectstearic aciden
dc.subjectsolubilityen
dc.subjectelectric double leyeren
dc.subjectcalciteen
dc.titleReakcije kalcita u vodi i u prisustvu stearinske kiselinesr
dc.titleReactions of calcite in water in the presence of stearic aciden
dc.typearticle
dc.rights.licenseARR
dc.citation.epage144
dc.citation.issue3
dc.citation.other(3): 129-144
dc.citation.rankM24
dc.citation.spage129
dc.identifier.doi10.5937/mmeb1503129m
dc.identifier.fulltexthttps://ritnms.itnms.ac.rs/bitstream/id/128/337.pdf
dc.identifier.rcubconv_420
dc.type.versionpublishedVersion


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