Effect of acid treatment on red mud properties with implications on Ni(II) sorption and stability
Samo za registrovane korisnike
2014
Autori
Smičiklas, Ivana D.Smiljanić, Slavko N.
Perić-Grujić, Aleksandra
Šljivić-Ivanović, Marija Z.
Mitrić, Miodrag
Antonović, Dušan
Članak u časopisu (Objavljena verzija)
Metapodaci
Prikaz svih podataka o dokumentuApstrakt
Red mud, a heterogeneous mineral waste from aluminum industry, can be beneficially utilized as a sorbent. High alkalinity and the amount of water soluble ions can limit some of its applications. This study's aim was to explore and correlate physicochemical properties and sorption efficiencies of acid treated red mud. Sorbents (BRM0.05-BRM1), obtained by varying HCl concentration (0.05-1 mol/L), were characterized in terms of mineralogical composition, surface functional groups, electrical conductivity (EC) and the point of zero charge (pH(PZC)). Removal of Ni(II) ions was tested in batch conditions. Sorbents EC and pH(PZC) values decreased with the increase of acid concentration. Structural analysis revealed that sodalite and calcite phases were completely lost starting from the samples BRM0.25 and BRM0.5, respectively. Along with the sodalite dissolution, gibbsite precipitation was observed. Ni(II) sorption increased with the increase of initial pH from 2 to 4, while at pH gt 4 it de...pended only on sorbent material. A radical drop of maximum sorption capacities was associated with the increase of acid concentration to 0.25 mol/L, whereas additional rise to 1 mol/L caused minor fluctuations. Fully loaded sorbents BRM0.25-BRM0.1 also exhibited considerable lower stability over a range of investigated pH conditions. Dissolution of sodalite and calcite, and the consequent reduction of buffering capacities can be identified as the main reasons for decreasing sorption efficiency. Sample BRM0.05 was efficient in terms of both sorption and stability, yet environmentally more benign than the original red mud due to the lower alkalinity and content of water soluble ions.
Ključne reči:
Red mud / Acid treatments / Ni(II) / Sorption / DesorptionIzvor:
Chemical Engineering Journal, 2014, 242, 27-35Izdavač:
- Elsevier Science Sa, Lausanne
Finansiranje / projekti:
- Nove tehnologije za monitoring i zaštitu životnog okruženja od štetnih hemijskih supstanci i radijacionog opterećenja (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-43009)
DOI: 10.1016/j.cej.2013.12.079
ISSN: 1385-8947
WoS: 000333787000004
Scopus: 2-s2.0-84892413227
Institucija/grupa
Tehnološko-metalurški fakultetTY - JOUR AU - Smičiklas, Ivana D. AU - Smiljanić, Slavko N. AU - Perić-Grujić, Aleksandra AU - Šljivić-Ivanović, Marija Z. AU - Mitrić, Miodrag AU - Antonović, Dušan PY - 2014 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2843 AB - Red mud, a heterogeneous mineral waste from aluminum industry, can be beneficially utilized as a sorbent. High alkalinity and the amount of water soluble ions can limit some of its applications. This study's aim was to explore and correlate physicochemical properties and sorption efficiencies of acid treated red mud. Sorbents (BRM0.05-BRM1), obtained by varying HCl concentration (0.05-1 mol/L), were characterized in terms of mineralogical composition, surface functional groups, electrical conductivity (EC) and the point of zero charge (pH(PZC)). Removal of Ni(II) ions was tested in batch conditions. Sorbents EC and pH(PZC) values decreased with the increase of acid concentration. Structural analysis revealed that sodalite and calcite phases were completely lost starting from the samples BRM0.25 and BRM0.5, respectively. Along with the sodalite dissolution, gibbsite precipitation was observed. Ni(II) sorption increased with the increase of initial pH from 2 to 4, while at pH gt 4 it depended only on sorbent material. A radical drop of maximum sorption capacities was associated with the increase of acid concentration to 0.25 mol/L, whereas additional rise to 1 mol/L caused minor fluctuations. Fully loaded sorbents BRM0.25-BRM0.1 also exhibited considerable lower stability over a range of investigated pH conditions. Dissolution of sodalite and calcite, and the consequent reduction of buffering capacities can be identified as the main reasons for decreasing sorption efficiency. Sample BRM0.05 was efficient in terms of both sorption and stability, yet environmentally more benign than the original red mud due to the lower alkalinity and content of water soluble ions. PB - Elsevier Science Sa, Lausanne T2 - Chemical Engineering Journal T1 - Effect of acid treatment on red mud properties with implications on Ni(II) sorption and stability EP - 35 SP - 27 VL - 242 DO - 10.1016/j.cej.2013.12.079 ER -
@article{ author = "Smičiklas, Ivana D. and Smiljanić, Slavko N. and Perić-Grujić, Aleksandra and Šljivić-Ivanović, Marija Z. and Mitrić, Miodrag and Antonović, Dušan", year = "2014", abstract = "Red mud, a heterogeneous mineral waste from aluminum industry, can be beneficially utilized as a sorbent. High alkalinity and the amount of water soluble ions can limit some of its applications. This study's aim was to explore and correlate physicochemical properties and sorption efficiencies of acid treated red mud. Sorbents (BRM0.05-BRM1), obtained by varying HCl concentration (0.05-1 mol/L), were characterized in terms of mineralogical composition, surface functional groups, electrical conductivity (EC) and the point of zero charge (pH(PZC)). Removal of Ni(II) ions was tested in batch conditions. Sorbents EC and pH(PZC) values decreased with the increase of acid concentration. Structural analysis revealed that sodalite and calcite phases were completely lost starting from the samples BRM0.25 and BRM0.5, respectively. Along with the sodalite dissolution, gibbsite precipitation was observed. Ni(II) sorption increased with the increase of initial pH from 2 to 4, while at pH gt 4 it depended only on sorbent material. A radical drop of maximum sorption capacities was associated with the increase of acid concentration to 0.25 mol/L, whereas additional rise to 1 mol/L caused minor fluctuations. Fully loaded sorbents BRM0.25-BRM0.1 also exhibited considerable lower stability over a range of investigated pH conditions. Dissolution of sodalite and calcite, and the consequent reduction of buffering capacities can be identified as the main reasons for decreasing sorption efficiency. Sample BRM0.05 was efficient in terms of both sorption and stability, yet environmentally more benign than the original red mud due to the lower alkalinity and content of water soluble ions.", publisher = "Elsevier Science Sa, Lausanne", journal = "Chemical Engineering Journal", title = "Effect of acid treatment on red mud properties with implications on Ni(II) sorption and stability", pages = "35-27", volume = "242", doi = "10.1016/j.cej.2013.12.079" }
Smičiklas, I. D., Smiljanić, S. N., Perić-Grujić, A., Šljivić-Ivanović, M. Z., Mitrić, M.,& Antonović, D.. (2014). Effect of acid treatment on red mud properties with implications on Ni(II) sorption and stability. in Chemical Engineering Journal Elsevier Science Sa, Lausanne., 242, 27-35. https://doi.org/10.1016/j.cej.2013.12.079
Smičiklas ID, Smiljanić SN, Perić-Grujić A, Šljivić-Ivanović MZ, Mitrić M, Antonović D. Effect of acid treatment on red mud properties with implications on Ni(II) sorption and stability. in Chemical Engineering Journal. 2014;242:27-35. doi:10.1016/j.cej.2013.12.079 .
Smičiklas, Ivana D., Smiljanić, Slavko N., Perić-Grujić, Aleksandra, Šljivić-Ivanović, Marija Z., Mitrić, Miodrag, Antonović, Dušan, "Effect of acid treatment on red mud properties with implications on Ni(II) sorption and stability" in Chemical Engineering Journal, 242 (2014):27-35, https://doi.org/10.1016/j.cej.2013.12.079 . .