Highly efficient adsorption of strontium ions by carbonated mesoporous TiO2

Mironyuk, Ivan; Tatarchuk, Tetiana; Naushad, Mu.; Vasylyeva, Hanna; Mykytyn, Igor

doi:10.1016/j.molliq.2019.04.111

Cited by 232 publications

(73 citation statements)

References 38 publications

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“…The kinetic studies of ion exchange adsorption are necessary to develop and design an ion exchange system for treatment of contaminated water on pilot and industrial scale [2]. The adsorption kinetic data for Cd(II) onto Amberlyst-15 were analyzed by pseudo-first order, pseudo-second order models [5,42]. The linear form of pseudo-first order model can be given as:…”

Section: Application Of Kinetic Modelsmentioning

confidence: 99%

“…When the values of E are less than 8 kJ mol −1 indicate the physical adsorption and greater than 16 kJ mol −1 represents chemical adsorption while in the range 8-16 kJ mol −1 ion exchange removal mechanism [5]. It is clear from the table 2 that E values (13-15 kJ mol −1 ) for all the temperatures obtained from the above equation resides in the range 8-16 kJ mol −1 which confirms the ion exchange reaction mechanism of Cd(II) removal onto Amberlyst-15.…”

Section: Application Of Adsorption Isotherm Modelsmentioning

confidence: 99%

“…Therefore, the removal of heavy metal ions from aqueous solutions becomes compulsory and challenging owing to their acute toxic effects. Many conventional techniques are available for removal of heavy metal ions which includes solvent extraction, precipitation, photocatalyrtic degradation, coagulation, reverse osmosis, membrane separation, biological degradation, ion exchange and adsorption [5][6][7]. Among all these described techniques, ion exchange is most promising and versatile because of numerous advantages such as high removal efficiency, more selectively, easy operation and designing, regeneration and recovery of both adsorbate and adsorbent, no sludge formation and production of secondary pollutants.…”

Section: Introductionmentioning

confidence: 99%

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Adsorption potential of macroporous Amberlyst-15 for Cd(II) removal from aqueous solutions

Razzaq

Shah

Fahad

et al. 2020

Mater. Res. Express

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The macroporous ion exchange resins are unique and most suitable for the adsorption of heavy metal ions due to their porous three-dimensional structures and large specific surface areas. In the current investigation, a macroporous sulphonic acid cation exchange resin Amberlyst-15 was implemented for the adsorption of Cd (II) using batch adsorption technique to evaluate its removal efficiency. The characterization of resin surface was performed by several techniques: Scanning Electron Microscopy/Energy dispersive x-ray Spectroscopy (SEM/EDS), Thermogravimetric analysis (TGA), Fourier-transform infrared spectroscopy (FT-IR), Brunauer-Emmett-Teller (BET) surface area and Point of zero charge (PZC). The effects of various experimental parameters such as time, temperature, concentration, pH and dosage amount were examined in detail. The optimum pH for maximum uptake of Cd(II) onto the Amberlyst.15 was observed at pH 3 showing the efficient working of resin under highly acidic conditions. The results also proved that Amberlyst-15 showed tremendous adsorption potential toward Cd(II) removal; 99.95% removal within 30 min reaction time and 2.01 mmol g −1 maximum adsorption capacity at 323 K. The adsorption data was well described by Langmuir adsorption isotherm and pseudo second order models. The thermodynamic parameters revealed that the adsorption was endothermic, spontaneous and feasible process with increased randomness at resin surface. The free energy of adsorption (E) (13-15 kJ mol −1 ) determined from Dubinin-Radushkevitch (D-R) model proved the ion exchange reaction mechanism for Cd(II) adsorption. The experimental results reported herein validate that Amberlyst.15 resin is a promising adsorbent for the enhanced removal of Cd(II) and other toxic metals from contaminated water and waste effluents.

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Section: Application Of Kinetic Modelsmentioning

confidence: 99%

Section: Application Of Adsorption Isotherm Modelsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Adsorption potential of macroporous Amberlyst-15 for Cd(II) removal from aqueous solutions

Razzaq

Shah

Fahad

et al. 2020

Mater. Res. Express

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“…The synthesis and study of surface characteristics of the mesoporous TiO 2 is describe in detail in the publication I. Mironyuk at all.2019 [17]. According to results described in [17], adding a modifying agent for percentage provide obtaining TiO 2 nanoparticles with chemosorbed carbonate groups of 2, 4 and 8 percent. The optimum amount of the modifying reagent is 4% (4С-ТіО 2 ).…”

Section: Experimental Technique Synthesis Of Adsorbentsmentioning

confidence: 99%

Adsorption of Barium and Zinc Ions by Mesoporous TiO2 with Chemosorbed Carbonate Groups

Vasylyeva

Mironyuk

Mykytyn

et al. 2019

PCSS

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In the present paper the mesoporous TiO 2 with chemosorbed carbonate groups was investigated as an adsorbent for the removal of Zn 2+ and Ba 2+ cations from aqueous solutions.The dependence of the adsorption values of Zn 2+ and Ba 2+ on the agitation time, solution's acidity, and modification of surface of TiO 2 was determined. The process of Zn 2+ and Ba 2+ adsorption fit well by Lagergren's pseudo-second-order kinetic model. The equilibrium adsorption was investigated in the concentration of heavy metal's ranges 27.46 mg/L -7809 mg/L. The experimental data was approximated by Langmuir and Dubinin-Radushcevich adsorption theories. The energy of adsorption Zn 2+ and Ba 2+ onto modified TiO 2 and unmodified TiO 2 was calculated using Dubinin-Radushkevich equations, and was found to be 15.82 -9.399 kJ/mol, which corresponds to the mechanism of physical adsorption. The application of Langmuir theory to experimental adsorption data gives high R 2 , close to unit. Separation factor R L indicates, that adsorption Zn 2+ and Ba 2+ onto modified TiO 2 is very favorable.The mechanism of adsorption of bivalent cations by the modified sample is approximately the same. The difference in the adsorption of Zn 2+ compared with Ba 2+ is that cations of Zn 2+ (with small size) can diffuse into the micro pores of modified TiO 2 . The adsorption of Zn 2+ is not so strongly influenced by the presence of Ba 2+ , as in the adsorption of Ba 2+ the presence of Zn 2+ in the solution. This fact can be used for the separation of the Zn 2+ -Ba 2+ pair.Modified mesoporous ТіО 2 is very efficient adsorbent toward Zn 2+ and Ba 2+ cations from their individual solutions as well as from their mixture, and able to compete with the best world analogues.

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“…Many techniques have been developed for the removal of such types of pollutants from wastewater such as advanced oxidation processes [4], aerobic degradation [5], nano-filtration [6], ozonation [7] and others. The familiar technique is the adsorption process which has become one of the most effective means for transferring the solute from the liquid phase to the solid phase of a sorbent [8][9][10][11][12][13]. Adsorption can be achieved by using different material especially the activated carbon which is a very useful and effective technique in the remediation of wastewater contaminated with organic compounds [14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Predominant Mechanisms in the Treatment of Wastewater Due to Interaction of Benzaldehyde and Iron Slag Byproduct

Faisal

Alquzweeni

Naji

et al. 2019

IJERPH

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Iron slag is a byproduct generated in huge quantities from recycled remnants of iron and steel factories; therefore, the possibility of using this waste in the removal of benzaldehyde from contaminated water offers an excellent topic in sustainability field. Results reveal that the removal efficiency was equal to 85% for the interaction of slag and water contaminated with benzaldehyde at the best operational conditions of 0.3 g/100 mL, 6, 180 min, and 250 rpm for the sorbent dosage, initial pH, agitation time, and speed, respectively with 300 mg/L initial concentration. The maximum uptake capacity of iron slag was 118.25 mg/g which was calculated by the Langmuir model. Physical sorption may be the major mechanism for the removal of benzaldehyde onto iron slag based on the analysis of isotherm and kinetic sorption data and thermodynamically, the process was spontaneous and endothermic. Finally, the X-ray fluorescence spectroscopy (XRF), X-ray diffraction (XRD), Fourier transform infrared (FT-IR), scanning electron microscope (SEM) and energy-dispersive spectroscope (EDS) tests for reactive material certified that the dissolution of calcium oxide can enhance the removal of benzaldehyde by the formation of bridge cations.

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Highly efficient adsorption of strontium ions by carbonated mesoporous TiO2

Cited by 232 publications

References 38 publications

Adsorption potential of macroporous Amberlyst-15 for Cd(II) removal from aqueous solutions

Adsorption potential of macroporous Amberlyst-15 for Cd(II) removal from aqueous solutions

Adsorption of Barium and Zinc Ions by Mesoporous TiO2 with Chemosorbed Carbonate Groups

Predominant Mechanisms in the Treatment of Wastewater Due to Interaction of Benzaldehyde and Iron Slag Byproduct

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