dc.creator | Milovanović, Željka | |
dc.creator | Lazarević, Slavica | |
dc.creator | Janković-Častvan, Ivona | |
dc.creator | Radovanović, Željko | |
dc.creator | Cvetković, Slobodan | |
dc.creator | Janaćković, Đorđe | |
dc.creator | Petrović, Rada | |
dc.date.accessioned | 2023-08-14T08:17:07Z | |
dc.date.available | 2023-08-14T08:17:07Z | |
dc.date.issued | 2023 | |
dc.identifier.issn | 2073-4441 | |
dc.identifier.uri | http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6578 | |
dc.description.abstract | The sepiolite/ZrO2 composites were prepared by sepiolite (Sep) modification with zirconium propoxide in toluene at room temperature for 24 h (Sep–ZrI) or 95 °C for 4 h (sample Sep–ZrII). The efficiency of the obtained composites for the removal of phosphate from aqueous solutions at initial pH = 4 and pH = 8 was investigated. Characterization of the samples shows that synthesis at a higher temperature for a shorter time provides a slightly higher content of amorphous Zr phase, which is deposited on the sepiolite fibers as a thin layer and agglomerated nanoparticles. Compared to Sep, the composites have a lower point of zero charge and higher specific surface area and pore volume. The adsorption kinetics follow the pseudo second-order model. The adsorption capacities of the composites are approximately the same at both initial pH and higher at initial pH = 4 than at pH = 8. The XPS and ATR-FTIR of Sep–ZrI before and after adsorption identifies the formation of inner-sphere complexes as the mechanism of phosphate adsorption. The slow release during desorption with NaOH solution confirms the strong bonds of the phosphates with the surface of the composites. | sr |
dc.language.iso | en | sr |
dc.publisher | MDPI | sr |
dc.relation | info:eu-repo/grantAgreement/MESTD/inst-2020/200026/RS// | sr |
dc.relation | info:eu-repo/grantAgreement/MESTD/inst-2020/200135/RS// | sr |
dc.relation | info:eu-repo/grantAgreement/MESTD/inst-2020/200287/RS// | sr |
dc.rights | openAccess | sr |
dc.rights.uri | https://creativecommons.org/licenses/by/4.0/ | |
dc.source | Water | sr |
dc.subject | adsorption kinetics | sr |
dc.subject | phosphate adsorption | sr |
dc.subject | sepiolite | sr |
dc.subject | XPS analysis | sr |
dc.subject | Zr propoxide functionalization | sr |
dc.title | The Removal of Phosphate from Aqueous Solutions by Sepiolite/ZrO2 Composites: Adsorption Behavior and Mechanism | sr |
dc.type | article | sr |
dc.rights.license | BY | sr |
dc.citation.issue | 13 | |
dc.citation.rank | M22~ | |
dc.citation.spage | 2376 | |
dc.citation.volume | 15 | |
dc.identifier.doi | 10.3390/w15132376 | |
dc.identifier.fulltext | http://TechnoRep.tmf.bg.ac.rs/bitstream/id/17595/water-15-02376-v2.pdf | |
dc.identifier.scopus | 2-s2.0-85164828311 | |
dc.type.version | publishedVersion | sr |