Influence of the synthesis parameters on the properties of the sepiolite-based magnetic adsorbents
Само за регистроване кориснике
2017
Аутори
Ahribesh, Aysha AliLazarević, Slavica
Janković-Častvan, Ivona
Jokić, Bojan
Spasojević, Vojislav
Radetić, Tamara
Janaćković, Đorđe
Petrović, Rada
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
The magnetic nanocomposites (MNCs), used as adsorbents for Cd2+ ions, were prepared by a co-precipitation method using both the untreated natural (SEP) and the partially acid-activated (ASEP) sepiolites as supports for magnetite. The synthesis conditions differed as follows: NaOH or NH3 was added in the SEP or the ASEP suspension before or after the addition of Fe3 and Fe2+. The SEP-based MNCs prepared using NaOH had a lower magnetization, but higher adsorption capacities than the MNCs synthesized using NH3. The order of the mixing of the reagents had a small influence on the properties of SEP-based MNCs, especially when NaOH was used for the synthesis. Due to acidity of the surface functional groups of the ASEP, the magnetic composite could be synthesized only when NH3 was added in the suspension of ASEP having Fe3+ and Fe2+ ions. Despite of the worse dispersibility of the magnetic particles, the adsorption capacityof the ASEP-based composite was higher than of the MNC with SEP prepar...ed by the same procedure. All the MNCs showed a superparamagnetic behavior at room temperature and the adsorption capacities were higher than of pure compounds. The adsorption of Cd2+ on the composites was best fitted with the Sips model, which suggested the chemisorption on the heterogeneous surface at energetically non-uniform sites until a monolayer was formed.
Кључне речи:
Magnetic nanocomposites / Sepiolite/acid-activated sepiolite / Co-precipitation, synthesis parameters / Cd2+ adsorptionИзвор:
Powder Technology, 2017, 305, 260-269Издавач:
- Elsevier Science Bv, Amsterdam
Финансирање / пројекти:
DOI: 10.1016/j.powtec.2016.09.086
ISSN: 0032-5910
WoS: 000390732000030
Scopus: 2-s2.0-84991087342
Институција/група
Tehnološko-metalurški fakultetTY - JOUR AU - Ahribesh, Aysha Ali AU - Lazarević, Slavica AU - Janković-Častvan, Ivona AU - Jokić, Bojan AU - Spasojević, Vojislav AU - Radetić, Tamara AU - Janaćković, Đorđe AU - Petrović, Rada PY - 2017 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3667 AB - The magnetic nanocomposites (MNCs), used as adsorbents for Cd2+ ions, were prepared by a co-precipitation method using both the untreated natural (SEP) and the partially acid-activated (ASEP) sepiolites as supports for magnetite. The synthesis conditions differed as follows: NaOH or NH3 was added in the SEP or the ASEP suspension before or after the addition of Fe3 and Fe2+. The SEP-based MNCs prepared using NaOH had a lower magnetization, but higher adsorption capacities than the MNCs synthesized using NH3. The order of the mixing of the reagents had a small influence on the properties of SEP-based MNCs, especially when NaOH was used for the synthesis. Due to acidity of the surface functional groups of the ASEP, the magnetic composite could be synthesized only when NH3 was added in the suspension of ASEP having Fe3+ and Fe2+ ions. Despite of the worse dispersibility of the magnetic particles, the adsorption capacityof the ASEP-based composite was higher than of the MNC with SEP prepared by the same procedure. All the MNCs showed a superparamagnetic behavior at room temperature and the adsorption capacities were higher than of pure compounds. The adsorption of Cd2+ on the composites was best fitted with the Sips model, which suggested the chemisorption on the heterogeneous surface at energetically non-uniform sites until a monolayer was formed. PB - Elsevier Science Bv, Amsterdam T2 - Powder Technology T1 - Influence of the synthesis parameters on the properties of the sepiolite-based magnetic adsorbents EP - 269 SP - 260 VL - 305 DO - 10.1016/j.powtec.2016.09.086 ER -
@article{ author = "Ahribesh, Aysha Ali and Lazarević, Slavica and Janković-Častvan, Ivona and Jokić, Bojan and Spasojević, Vojislav and Radetić, Tamara and Janaćković, Đorđe and Petrović, Rada", year = "2017", abstract = "The magnetic nanocomposites (MNCs), used as adsorbents for Cd2+ ions, were prepared by a co-precipitation method using both the untreated natural (SEP) and the partially acid-activated (ASEP) sepiolites as supports for magnetite. The synthesis conditions differed as follows: NaOH or NH3 was added in the SEP or the ASEP suspension before or after the addition of Fe3 and Fe2+. The SEP-based MNCs prepared using NaOH had a lower magnetization, but higher adsorption capacities than the MNCs synthesized using NH3. The order of the mixing of the reagents had a small influence on the properties of SEP-based MNCs, especially when NaOH was used for the synthesis. Due to acidity of the surface functional groups of the ASEP, the magnetic composite could be synthesized only when NH3 was added in the suspension of ASEP having Fe3+ and Fe2+ ions. Despite of the worse dispersibility of the magnetic particles, the adsorption capacityof the ASEP-based composite was higher than of the MNC with SEP prepared by the same procedure. All the MNCs showed a superparamagnetic behavior at room temperature and the adsorption capacities were higher than of pure compounds. The adsorption of Cd2+ on the composites was best fitted with the Sips model, which suggested the chemisorption on the heterogeneous surface at energetically non-uniform sites until a monolayer was formed.", publisher = "Elsevier Science Bv, Amsterdam", journal = "Powder Technology", title = "Influence of the synthesis parameters on the properties of the sepiolite-based magnetic adsorbents", pages = "269-260", volume = "305", doi = "10.1016/j.powtec.2016.09.086" }
Ahribesh, A. A., Lazarević, S., Janković-Častvan, I., Jokić, B., Spasojević, V., Radetić, T., Janaćković, Đ.,& Petrović, R.. (2017). Influence of the synthesis parameters on the properties of the sepiolite-based magnetic adsorbents. in Powder Technology Elsevier Science Bv, Amsterdam., 305, 260-269. https://doi.org/10.1016/j.powtec.2016.09.086
Ahribesh AA, Lazarević S, Janković-Častvan I, Jokić B, Spasojević V, Radetić T, Janaćković Đ, Petrović R. Influence of the synthesis parameters on the properties of the sepiolite-based magnetic adsorbents. in Powder Technology. 2017;305:260-269. doi:10.1016/j.powtec.2016.09.086 .
Ahribesh, Aysha Ali, Lazarević, Slavica, Janković-Častvan, Ivona, Jokić, Bojan, Spasojević, Vojislav, Radetić, Tamara, Janaćković, Đorđe, Petrović, Rada, "Influence of the synthesis parameters on the properties of the sepiolite-based magnetic adsorbents" in Powder Technology, 305 (2017):260-269, https://doi.org/10.1016/j.powtec.2016.09.086 . .