Sorption performances of TiO(OH)(H2PO4)·H2O in synthetic and mine waters

Trublet, Mylène; Маслова, М. В.; Rusanova, Daniela; Antzutkin, Oleg N.

doi:10.1039/c6ra25410a

Cited by 18 publications

(30 citation statements)

References 49 publications

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“…The calculated values of q e coincided with The values of q exp . For The 1 mM solution, The calculated value of k 2 was in good agreement with The value of k 2 obtained by Trublet [26]. The high k 2 values explained The rapid (within The first minutes) almost complete sorption of Pb 2+ and Zn 2+ ions.…”

Section: Discussionsupporting

confidence: 86%

“…The procedure was repeated twice, and the results were averaged. A similar result was reported for titanium phosphate where the maximum leaching of P-species was 2.5% in basic media [26].…”

Section: Chemical Stability Testsupporting

confidence: 85%

“…Maximum metal uptake reached 0.2 and 0.195 mmol•g −1 for Pb 2+ and Zn 2+ , respectively. Trublet et al [26] also showed that The kinetic process on TiO(OH)H 2 PO 4 •H 2 O is relatively fast, and The equilibrium was reached within 10-20 min.…”

Section: Sorption Kinetics and Mechanism Of Pb 2+ And Zn 2+ Uptake Onmentioning

confidence: 99%

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Comparison of The Sorption Kinetics of Lead(II) and Zinc(II) on Titanium Phosphate Ion-Exchanger

Маслова

Иваненко

Yanicheva

et al. 2020

IJMS

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The treatment of heavy metal-contaminated wastewater is an important action to reduce The negative impacts of industrial wastes on water bodies. This work focuses on The application of a low-cost titanium (IV) phosphate sorbent of TiO(OH)H2PO42H2O chemical composition toward lead and zinc ions depending on their concentration and The temperature of The solution. The kinetic studies showed that The values of The rate of intraparticle diffusion and The effective diffusion coefficients for Zn2+ were considerably higher than those for Pb2+. To explain The difference between The sorption kinetics rates for Pb2+ and Zn2+, The effective radius and dehydration degree of The adsorbed ions were calculated. The sorbent capability of The lead and zinc ion removal and its excellent efficiency in The presence of a high concentration of calcium ions were demonstrated using simulated mine water. Due to The fast kinetics and The high exchange capacity of titanium phosphate toward divalent ions, this sorbent can be considered as a promising material for The concentration and immobilization of heavy metals into The phosphate matrix.

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Section: Discussionsupporting

confidence: 86%

“…The procedure was repeated twice, and the results were averaged. A similar result was reported for titanium phosphate where the maximum leaching of P-species was 2.5% in basic media [26].…”

Section: Chemical Stability Testsupporting

confidence: 85%

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Comparison of The Sorption Kinetics of Lead(II) and Zinc(II) on Titanium Phosphate Ion-Exchanger

Маслова

Иваненко

Yanicheva

et al. 2020

IJMS

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“…Higher P:Ti molar ratio is beneficial for the hydrolytic stability of the am-TiP materials, 45 but the higher P:Ti ratio in the synthetic mother liquid does not guarantee the higher ratio in the final composition.…”

Section: Comparison Of Am-tip With Literature Resultsmentioning

confidence: 99%

Efficient and Selective Recovery of Trace Scandium by Inorganic Titanium Phosphate Ion-Exchangers from Leachates of Waste Bauxite Residue

Zhang

Koivula

Wiikinkoski

et al. 2017

ACS Sustainable Chem. Eng.

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Bauxite residue (BR) is an inevitable industrial waste generated through the classic Bayer extraction of alumina from bauxite minerals. It contains relatively significant amount of valuable rare earth elements, including scandium, and therefore we explored the suitability of trace scandium recovery from BR acid leachate by titanium phosphate (TiP) ion exchangers. Three kinds of TiP materials (amorphous TiP, α-TiP and γ-TiP) were synthesized through fluorine-free precursors and characterized by chemical analysis, XRD, FE-SEM, FTIR, UV/Vis diffuse reflectance spectrometry, 31 P MAS NMR, TGA and potentiometric titration. The Sc 3+ exchange capacities were determined as 1.74, 0.55 and 0.22 meq g -1 for amorphous, α-and γ-TiP, respectively. Competition of major elements (Fe, Al, Ca) in BR leachate with Sc uptake was studied in batch experiments using binary equimolar mixtures, and the separation factors of Sc/Fe 2+ , Sc/Al and Sc/Ca reach the magnitudes of 10 to 1000 on amorphous TiP. 2 The high Sc 3+ selectivity by amorphous TiP was suspected to be the matching of Ti 4+ lattice radius with Sc 3+ ionic radius (both 0.745 Å). Finally, the separation of trace scandium from the simulated BR leachate solution was demonstrated on an amorphous TiP column. The interference of Fe 3+ has been partially resolved by on-column reduction using sodium sulphite. The optimized final eluate contained only Sc, Fe and Al. The concentration ratio of Sc/Fe can be increased by a factor of 8.8 and Sc/Al by 265 through a single cycle of chromatographic separation with a Sc recovery rate of 91.1%. KEY WORDSTitanium phosphate; scandium recovery; ion exchange; bauxite residue.

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“…It has been proven that the ion-exchange capacity (IEC) is dependent on the degree of TiP crystallinity, the Ti:P molar ratios, the sorbents’ stability and that all these factors should be taken into account when designing new TiP ion-exchangers. Recent studies have reported very promising ion-exchange properties of an amorphous TiP material with chemical formula TiO(OH)(H 2 PO 4 )·H 2 O (TiP1). − The material has been found to be the most chemically stable TiP ion-exchanger at a pH range of 2–10. The maximum hydrolysis of P-units (2.5%) was observed at pH = 10 while the hydrolysis of Ti-units remained negligible in the whole pH range.…”

Section: Introductionmentioning

confidence: 99%

Complete Column Trials for Water Refinement Using Titanium(IV) Phosphate Sorbents

Trublet

Rusanova

2018

ACS Sustainable Chem. Eng.

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A titanium phosphate sorbent with linked active units (LTP) is synthesized. XRD, 31P MAS NMR, and TGA techniques are used to disclose the relation between the ion-exchange units of −HPO4 (crystalline α-TiP) and of −H2PO4 (amorphous TiP1) type. The reported kinetics data of TiP1 sorbent in batch mode have been reprocessed according to the nonlinear approach in order to explore further the sorption mechanism. It was found that the data could be well described by the pseudo-second-order model in the case of Ni2+ ions. Consequently, fixed-bed column sorption experiments of Ni2+ ions on LTP were designed, and the effects of both the amount of nickel(II) ions in the feed solution and the flow rates on the sorption equilibrium were studied. The ion-exchange capacity is estimated to be 1.6 meq·g–1 during the first four cycles before decreasing to 1.2 meq·g–1 for cycles five and six. The experimental data were simulated following the Thomas model, and desorption experiments with HCl were performed. Observations show that regeneration and reutilization of the LTP ion-exchanger are possible through at least six cycles. It is revealed that the sorption performances in column conditions could be undoubtedly predicted from the corresponding batch sorption data.

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Sorption performances of TiO(OH)(H₂PO₄)·H₂O in synthetic and mine waters

Cited by 18 publications

References 49 publications

Comparison of The Sorption Kinetics of Lead(II) and Zinc(II) on Titanium Phosphate Ion-Exchanger

Comparison of The Sorption Kinetics of Lead(II) and Zinc(II) on Titanium Phosphate Ion-Exchanger

Efficient and Selective Recovery of Trace Scandium by Inorganic Titanium Phosphate Ion-Exchangers from Leachates of Waste Bauxite Residue

Complete Column Trials for Water Refinement Using Titanium(IV) Phosphate Sorbents

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