A comparative study of the removal of lead, cadmium and zinc ions from aqueous solutions by natural and Fe(III)-modified zeolite
The main purpose of this research was to explain the differences in the adsorption mechanisms and adsorption capacities of natural and Fe(III)-modified zeolite for Pb2+, Zn2+ and Cd2+ ions. The adsorbents were characterized with respect to their phase composition, morphology, specific su...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Association of the Chemical Engineers of Serbia
2014-01-01
|
| Series: | Chemical Industry and Chemical Engineering Quarterly |
| Subjects: | |
| Online Access: | http://www.doiserbia.nb.rs/img/doi/1451-9372/2014/1451-93721300010M.pdf |
| _version_ | 1819132925076045824 |
|---|---|
| author | Mihajlović Marija T. Lazarević Slavica S. Janković-Častvan Ivona M. Jokić Bojan M. Janaćković Đorđe T. Petrović Rada D. |
| author_facet | Mihajlović Marija T. Lazarević Slavica S. Janković-Častvan Ivona M. Jokić Bojan M. Janaćković Đorđe T. Petrović Rada D. |
| author_sort | Mihajlović Marija T. |
| collection | DOAJ |
| description | The main purpose of this research was to explain the differences in the
adsorption mechanisms and adsorption capacities of natural and
Fe(III)-modified zeolite for Pb2+, Zn2+ and Cd2+ ions. The adsorbents were
characterized with respect to their phase composition, morphology, specific
surface area, cation exchange capacity and point of zero charge. Batch
adsorption experiments were performed as a function of the initial ion
concentration and temperature, at constant initial pH value of 5.5 ± 0.1. The
adsorption isotherms at 25, 40, 55 and 70°C suggest that the sequence of
adsorption efficiency of both zeolites is Pb2+ > Zn2+ > Cd2+. The adsorption
capacities of both zeolites increased with increasing temperature. The
equilibrium adsorption data were best described by the Langmuir adsorption
isotherm. This study revealed that the adsorption capacity of the
Fe(III)-modified zeolite is much higher than that of natural zeolite for all
investigated ions owing to the higher: specific adsorption caused by the new
functional groups formed on the zeolite surface; ion exchange due to the
presence of easily exchangeable ions; and hydroxide precipitation caused by
higher point of zero charge of the Fe(III)-modified zeolite compared to
natural zeolite. [Projekat Ministarstva nauke Republike Srbije, br. III
45019] |
| first_indexed | 2024-12-22T09:39:08Z |
| format | Article |
| id | doaj.art-f8c8a962bf714dc88a62a29a874a04fa |
| institution | Directory Open Access Journal |
| issn | 1451-9372 2217-7434 |
| language | English |
| last_indexed | 2024-12-22T09:39:08Z |
| publishDate | 2014-01-01 |
| publisher | Association of the Chemical Engineers of Serbia |
| record_format | Article |
| series | Chemical Industry and Chemical Engineering Quarterly |
| spelling | doaj.art-f8c8a962bf714dc88a62a29a874a04fa2022-12-21T18:30:45ZengAssociation of the Chemical Engineers of SerbiaChemical Industry and Chemical Engineering Quarterly1451-93722217-74342014-01-0120228329310.2298/CICEQ121017010M1451-93721300010MA comparative study of the removal of lead, cadmium and zinc ions from aqueous solutions by natural and Fe(III)-modified zeoliteMihajlović Marija T.0Lazarević Slavica S.1Janković-Častvan Ivona M.2Jokić Bojan M.3Janaćković Đorđe T.4Petrović Rada D.5Belgrade Waterworks and Sewerage, BelgradeFaculty of Technology and Metallurgy, BelgradeFaculty of Technology and Metallurgy, BelgradeFaculty of Technology and Metallurgy, BelgradeFaculty of Technology and Metallurgy, BelgradeFaculty of Technology and Metallurgy, BelgradeThe main purpose of this research was to explain the differences in the adsorption mechanisms and adsorption capacities of natural and Fe(III)-modified zeolite for Pb2+, Zn2+ and Cd2+ ions. The adsorbents were characterized with respect to their phase composition, morphology, specific surface area, cation exchange capacity and point of zero charge. Batch adsorption experiments were performed as a function of the initial ion concentration and temperature, at constant initial pH value of 5.5 ± 0.1. The adsorption isotherms at 25, 40, 55 and 70°C suggest that the sequence of adsorption efficiency of both zeolites is Pb2+ > Zn2+ > Cd2+. The adsorption capacities of both zeolites increased with increasing temperature. The equilibrium adsorption data were best described by the Langmuir adsorption isotherm. This study revealed that the adsorption capacity of the Fe(III)-modified zeolite is much higher than that of natural zeolite for all investigated ions owing to the higher: specific adsorption caused by the new functional groups formed on the zeolite surface; ion exchange due to the presence of easily exchangeable ions; and hydroxide precipitation caused by higher point of zero charge of the Fe(III)-modified zeolite compared to natural zeolite. [Projekat Ministarstva nauke Republike Srbije, br. III 45019]http://www.doiserbia.nb.rs/img/doi/1451-9372/2014/1451-93721300010M.pdfFe(III)-zeoliteadsorptionmetal ionsmechanism |
| spellingShingle | Mihajlović Marija T. Lazarević Slavica S. Janković-Častvan Ivona M. Jokić Bojan M. Janaćković Đorđe T. Petrović Rada D. A comparative study of the removal of lead, cadmium and zinc ions from aqueous solutions by natural and Fe(III)-modified zeolite Chemical Industry and Chemical Engineering Quarterly Fe(III)-zeolite adsorption metal ions mechanism |
| title | A comparative study of the removal of lead, cadmium and zinc ions from aqueous solutions by natural and Fe(III)-modified zeolite |
| title_full | A comparative study of the removal of lead, cadmium and zinc ions from aqueous solutions by natural and Fe(III)-modified zeolite |
| title_fullStr | A comparative study of the removal of lead, cadmium and zinc ions from aqueous solutions by natural and Fe(III)-modified zeolite |
| title_full_unstemmed | A comparative study of the removal of lead, cadmium and zinc ions from aqueous solutions by natural and Fe(III)-modified zeolite |
| title_short | A comparative study of the removal of lead, cadmium and zinc ions from aqueous solutions by natural and Fe(III)-modified zeolite |
| title_sort | comparative study of the removal of lead cadmium and zinc ions from aqueous solutions by natural and fe iii modified zeolite |
| topic | Fe(III)-zeolite adsorption metal ions mechanism |
| url | http://www.doiserbia.nb.rs/img/doi/1451-9372/2014/1451-93721300010M.pdf |
| work_keys_str_mv | AT mihajlovicmarijat acomparativestudyoftheremovalofleadcadmiumandzincionsfromaqueoussolutionsbynaturalandfeiiimodifiedzeolite AT lazarevicslavicas acomparativestudyoftheremovalofleadcadmiumandzincionsfromaqueoussolutionsbynaturalandfeiiimodifiedzeolite AT jankoviccastvanivonam acomparativestudyoftheremovalofleadcadmiumandzincionsfromaqueoussolutionsbynaturalandfeiiimodifiedzeolite AT jokicbojanm acomparativestudyoftheremovalofleadcadmiumandzincionsfromaqueoussolutionsbynaturalandfeiiimodifiedzeolite AT janackovicđorđet acomparativestudyoftheremovalofleadcadmiumandzincionsfromaqueoussolutionsbynaturalandfeiiimodifiedzeolite AT petrovicradad acomparativestudyoftheremovalofleadcadmiumandzincionsfromaqueoussolutionsbynaturalandfeiiimodifiedzeolite AT mihajlovicmarijat comparativestudyoftheremovalofleadcadmiumandzincionsfromaqueoussolutionsbynaturalandfeiiimodifiedzeolite AT lazarevicslavicas comparativestudyoftheremovalofleadcadmiumandzincionsfromaqueoussolutionsbynaturalandfeiiimodifiedzeolite AT jankoviccastvanivonam comparativestudyoftheremovalofleadcadmiumandzincionsfromaqueoussolutionsbynaturalandfeiiimodifiedzeolite AT jokicbojanm comparativestudyoftheremovalofleadcadmiumandzincionsfromaqueoussolutionsbynaturalandfeiiimodifiedzeolite AT janackovicđorđet comparativestudyoftheremovalofleadcadmiumandzincionsfromaqueoussolutionsbynaturalandfeiiimodifiedzeolite AT petrovicradad comparativestudyoftheremovalofleadcadmiumandzincionsfromaqueoussolutionsbynaturalandfeiiimodifiedzeolite |