The influence of citrate anion on Ni(II) removal by raw red mud from aluminum industry
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2013
Authors
Smičiklas, Ivana D.
Smiljanić, Slavko N.
Perić-Grujić, Aleksandra

Šljivić-Ivanović, Marija Z.

Antonović, Dušan
Article (Published version)

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The removal of Ni(II) from aqueous solutions by raw red mud powder was studied in the absence and in the presence of citrate ligand, as a function of process parameters. Using lower initial Ni(II) concentration (10(-3) mol/L) detectable amounts were found only at initial pH 3, whereas for higher concentration (2 x 10(-3) mol/L) removal increased simultaneously with pH in the range 3-4 and at pH gt 8. Process efficiency was suppressed in the presence of citrate. However, at Ni/Citrate molar ratios 1:0.25 and 1:0.5, 10-20% decrease was noticed in acidic media, while the negative influence diminished with the rise of pH. At higher ligand rates, formation of stable aqueous complex between Ni(II) and citrate significantly reduced metal removal in the whole tested initial pH range (3-10). Due to instantaneous pH rise above 8, removal of Ni(II) from 10(-3) mol/L solution was completed in 5 min. Kinetic data demonstrated slower Ni(II) uptake using both solutions of higher initial Ni(II) conc...entrations and Ni/Citrate solutions. At initial pH 5, estimated capacity towards Ni(II) was found to be 27.4 mg/g, without citrate. For Ni/Citrate molar ratios 1:0.25 and 1:0.5, capacities decreased slightly to 25 mg/g and 21 mg/g, whereas at equimolar and higher concentrations, citrate significantly inhibited Ni(II) immobilization (7.6 mg/g and 2.5 mg/g, respectively for Ni/Citrate ratios 1:1 and 1:2). The results demonstrated beneficial effect of red mud high alkalinity on Ni(II) removal. The sorbent satisfactorily immobilize nickel from solutions having initial Ni/Citrate molar ratios lower than 1:1, and neutral to alkaline initial pH. FUR analysis confirmed that red mud can act as a removal agent for Ni(II), Ni/Citrate complex and free citrate ligand.
Keywords:
Red mud / Ni(II) / Citrate / Sorption / PrecipitationSource:
Chemical Engineering Journal, 2013, 214, 327-335Publisher:
- Elsevier Science Sa, Lausanne
Funding / projects:
DOI: 10.1016/j.cej.2012.10.086
ISSN: 1385-8947
WoS: 000315322700040
Scopus: 2-s2.0-84870219151
Institution/Community
Tehnološko-metalurški fakultetTY - JOUR AU - Smičiklas, Ivana D. AU - Smiljanić, Slavko N. AU - Perić-Grujić, Aleksandra AU - Šljivić-Ivanović, Marija Z. AU - Antonović, Dušan PY - 2013 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2495 AB - The removal of Ni(II) from aqueous solutions by raw red mud powder was studied in the absence and in the presence of citrate ligand, as a function of process parameters. Using lower initial Ni(II) concentration (10(-3) mol/L) detectable amounts were found only at initial pH 3, whereas for higher concentration (2 x 10(-3) mol/L) removal increased simultaneously with pH in the range 3-4 and at pH gt 8. Process efficiency was suppressed in the presence of citrate. However, at Ni/Citrate molar ratios 1:0.25 and 1:0.5, 10-20% decrease was noticed in acidic media, while the negative influence diminished with the rise of pH. At higher ligand rates, formation of stable aqueous complex between Ni(II) and citrate significantly reduced metal removal in the whole tested initial pH range (3-10). Due to instantaneous pH rise above 8, removal of Ni(II) from 10(-3) mol/L solution was completed in 5 min. Kinetic data demonstrated slower Ni(II) uptake using both solutions of higher initial Ni(II) concentrations and Ni/Citrate solutions. At initial pH 5, estimated capacity towards Ni(II) was found to be 27.4 mg/g, without citrate. For Ni/Citrate molar ratios 1:0.25 and 1:0.5, capacities decreased slightly to 25 mg/g and 21 mg/g, whereas at equimolar and higher concentrations, citrate significantly inhibited Ni(II) immobilization (7.6 mg/g and 2.5 mg/g, respectively for Ni/Citrate ratios 1:1 and 1:2). The results demonstrated beneficial effect of red mud high alkalinity on Ni(II) removal. The sorbent satisfactorily immobilize nickel from solutions having initial Ni/Citrate molar ratios lower than 1:1, and neutral to alkaline initial pH. FUR analysis confirmed that red mud can act as a removal agent for Ni(II), Ni/Citrate complex and free citrate ligand. PB - Elsevier Science Sa, Lausanne T2 - Chemical Engineering Journal T1 - The influence of citrate anion on Ni(II) removal by raw red mud from aluminum industry EP - 335 SP - 327 VL - 214 DO - 10.1016/j.cej.2012.10.086 ER -
@article{ author = "Smičiklas, Ivana D. and Smiljanić, Slavko N. and Perić-Grujić, Aleksandra and Šljivić-Ivanović, Marija Z. and Antonović, Dušan", year = "2013", abstract = "The removal of Ni(II) from aqueous solutions by raw red mud powder was studied in the absence and in the presence of citrate ligand, as a function of process parameters. Using lower initial Ni(II) concentration (10(-3) mol/L) detectable amounts were found only at initial pH 3, whereas for higher concentration (2 x 10(-3) mol/L) removal increased simultaneously with pH in the range 3-4 and at pH gt 8. Process efficiency was suppressed in the presence of citrate. However, at Ni/Citrate molar ratios 1:0.25 and 1:0.5, 10-20% decrease was noticed in acidic media, while the negative influence diminished with the rise of pH. At higher ligand rates, formation of stable aqueous complex between Ni(II) and citrate significantly reduced metal removal in the whole tested initial pH range (3-10). Due to instantaneous pH rise above 8, removal of Ni(II) from 10(-3) mol/L solution was completed in 5 min. Kinetic data demonstrated slower Ni(II) uptake using both solutions of higher initial Ni(II) concentrations and Ni/Citrate solutions. At initial pH 5, estimated capacity towards Ni(II) was found to be 27.4 mg/g, without citrate. For Ni/Citrate molar ratios 1:0.25 and 1:0.5, capacities decreased slightly to 25 mg/g and 21 mg/g, whereas at equimolar and higher concentrations, citrate significantly inhibited Ni(II) immobilization (7.6 mg/g and 2.5 mg/g, respectively for Ni/Citrate ratios 1:1 and 1:2). The results demonstrated beneficial effect of red mud high alkalinity on Ni(II) removal. The sorbent satisfactorily immobilize nickel from solutions having initial Ni/Citrate molar ratios lower than 1:1, and neutral to alkaline initial pH. FUR analysis confirmed that red mud can act as a removal agent for Ni(II), Ni/Citrate complex and free citrate ligand.", publisher = "Elsevier Science Sa, Lausanne", journal = "Chemical Engineering Journal", title = "The influence of citrate anion on Ni(II) removal by raw red mud from aluminum industry", pages = "335-327", volume = "214", doi = "10.1016/j.cej.2012.10.086" }
Smičiklas, I. D., Smiljanić, S. N., Perić-Grujić, A., Šljivić-Ivanović, M. Z.,& Antonović, D.. (2013). The influence of citrate anion on Ni(II) removal by raw red mud from aluminum industry. in Chemical Engineering Journal Elsevier Science Sa, Lausanne., 214, 327-335. https://doi.org/10.1016/j.cej.2012.10.086
Smičiklas ID, Smiljanić SN, Perić-Grujić A, Šljivić-Ivanović MZ, Antonović D. The influence of citrate anion on Ni(II) removal by raw red mud from aluminum industry. in Chemical Engineering Journal. 2013;214:327-335. doi:10.1016/j.cej.2012.10.086 .
Smičiklas, Ivana D., Smiljanić, Slavko N., Perić-Grujić, Aleksandra, Šljivić-Ivanović, Marija Z., Antonović, Dušan, "The influence of citrate anion on Ni(II) removal by raw red mud from aluminum industry" in Chemical Engineering Journal, 214 (2013):327-335, https://doi.org/10.1016/j.cej.2012.10.086 . .