Removal of thorium (IV) ions from aqueous solution by a novel nanoporous ZnO: Isotherms, kinetic and thermodynamic studies

Kaynar, Ümit H.; Ayvacıklı, M.; Hiçsönmez, Ümran; Kaynar, Sermin Çam

doi:10.1016/j.jenvrad.2015.08.014

Cited by 63 publications

(28 citation statements)

References 47 publications

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“…It is shown in our previous study [26] that uranium (VI) adsorption percent for nanoparticles ZnO powders were 98.65 % ±1.05. The purpose of study was to study the high efficiency of nano-ZnO for remove of Sr(II).…”

Section: Introductionmentioning

confidence: 79%

“…[26]. As shown in Table 4, with increasing temperature, temperatures on nanoparticles ZnO occur more efficient sorption of Sr(II) ions at elevated.…”

Section: Adsorption Thermodynamicsmentioning

confidence: 86%

“…grade. In the said study, the crystallite structure accuracy and definition of particle size were 52 nm characterizations of the nano-ZnO which prepared with microwaveassisted medhod [26].…”

Section: Introductionmentioning

confidence: 99%

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The Removal of Sr(II) by a Nanoparticles ZnO Prepared by Microwave-Assisted Ignition Reaction

Kaynar¹,

Kaynar²

2017

Celal Bayar Üniversitesi Fen Bilimleri Dergisi

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Adsorptive behavior of nanoparticles ZnO was assessed for removal of Sr(II) in aqueous media in the different trial circumstance such as the effect of parameters (time, pH, concentration of Sr(II) and temperature) on sorption process. The capability of nanoparticles ZnO to remove Sr(II) from aqueous media was followed by a series of adsorption isotherms (Langmuir, Freunlinch and Temkin). The sorption percent and distribution coefficient for nanoparticles ZnO in ideal circumstances are % 96.5 ± 1.76; 6959 mL.g -1 for Sr(II), respectively. According to the Langmuir adsorption model, the maximum adsorption capacity of nanoparticles ZnO for Sr(II) were found to be 1396 mg.g -1 and sorption kinetics was preferable explained by the pseudo-second order equation. Thermodynamic data were identified. The results have been showed that nanoparticles ZnO was appropriate as adsorbent materiel for recovery and sorption of Sr(II) ions from aqueous media. It was found that synthesized ZnO powders had high capacity to recovery Sr(II) of the aqueous media as adsorbent.

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Section: Introductionmentioning

confidence: 79%

“…[26]. As shown in Table 4, with increasing temperature, temperatures on nanoparticles ZnO occur more efficient sorption of Sr(II) ions at elevated.…”

Section: Adsorption Thermodynamicsmentioning

confidence: 86%

See 1 more Smart Citation

The Removal of Sr(II) by a Nanoparticles ZnO Prepared by Microwave-Assisted Ignition Reaction

Kaynar¹,

Kaynar²

2017

Celal Bayar Üniversitesi Fen Bilimleri Dergisi

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“…Therefore, it is important to separate thorium to avoid the environment pollution before monazite processing. Separation of toxic Th(IV) ions is of intense current interest in research and environmental cleanup [3,4]. The traditional preconcentration and separation methods for Th(IV) are liquid-liquid extraction, coprecipitation, liquid membrane and ion-exchange resins, and so forth [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

“…Calixarene was extensively used for solvent extraction of transition metals, lanthanides and actinides [19][20][21][22]. The most prominent research belonged to Delegoz team who investigated the ability extraction of azocalix [4]arenes for solvent extraction of various transition metals from the aqueous phase to the organic phase [23][24][25]. Oueslati and coworkers have synthesized four azocalixarene derivatives bearing bipyridyl units with functional groups such as amide, ester, and pyridine at the phenolic oxygen atoms [26].…”

Section: Introductionmentioning

confidence: 99%

Solvent Extraction of Thorium Using 5,11,17,23-Tetra[(2-ethyl acetoethoxyphenyl)(azo)phenyl]calix[4]arene

Tran

Tán

Nguyen

2016

Journal of Chemistry

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A rapid, sensitive, and selective method for determination of thorium based on the complex with ortho-ester tetraazophenylcalix[4]arene (TEAC) was described. In the presence of pH of 4-6, TEAC-Th(IV) complex is extracted from an acidic aqueous solution into chloroform layer. The absorbance intensity of complex was measured by UV-Vis spectrometer at 525 nm and the molar absorptivity was found to be 2.4 × 10 4 . Beer's law was obeyed in the range of 1.0 to 25 × 10 −5 M thorium(IV). The effects of pH, TEAC concentration, and shaking time were also studied. The tolerance limits for several metal ions were calculated. The proposed method was applied to the determination of thorium in synthetic solution and in the monazite sand samples with good results.

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Synthesis of Pyridine Dicarboxylic Acid Functionalized and Crosslinked to Polyvinyl Alcohol/polyamide for Thorium Capturing From Aqueous Solution

Hendy,

Kashar,

Allam

et al. 2024

ChemistrySelect

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Thorium harms humans and the environment. Mining can release thorium‐containing waste. This study aims to simplify the production of a novel poly‐adsorbent by mixing pyridine dicarboxylic acid, polyvinyl alcohol, and polyamide and first removing thorium from the solution. Various analytical methods were used to characterize the produced dicarboxylic acid/polyvinyl alcohol/polyamide poly‐adsorbent. The practical conditions on adsorption effectiveness evaluated to pH 3.5, 60 mg poly‐adsorbent, 60 min. Th(IV) uptake for poly‐adsorbent is 107.3 mg/g. The linear and nonlinear uptake for the pseudo‐second‐order is closer to the practical uptake (107.71 mg/g). Hence, the kinetic analysis verified the sorption mechanism. Also, the uptake of linear (107.64 mg/g) and nonlinear (108.63 mg/g) types for the Langmuir isotherm is closer to the practical uptake (107.71 mg/g); thus, the sorption isotherm was suitably utilizing Langmuir modeling. Thermodynamic studies proved that the sorption is spontaneous, exothermic, and random due to the negative ΔG°, negative ΔH°, and positive ΔS° during the thorium adsorption process on poly‐adsorbent. In addition, the regeneration ability of poly‐adsorbent was tested utilizing 1.5 M H2SO4. After six cycles, the poly‐adsorbent showed about 83 % regeneration efficacy. The results confirmed that the dicarboxylic acid/polyvinyl alcohol/polyamide poly‐adsorbent might be effective in removing Th(IV) from the watery solution.

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Removal of thorium (IV) ions from aqueous solution by a novel nanoporous ZnO: Isotherms, kinetic and thermodynamic studies

Cited by 63 publications

References 47 publications

The Removal of Sr(II) by a Nanoparticles ZnO Prepared by Microwave-Assisted Ignition Reaction

The Removal of Sr(II) by a Nanoparticles ZnO Prepared by Microwave-Assisted Ignition Reaction

Solvent Extraction of Thorium Using 5,11,17,23-Tetra[(2-ethyl acetoethoxyphenyl)(azo)phenyl]calix[4]arene

Synthesis of Pyridine Dicarboxylic Acid Functionalized and Crosslinked to Polyvinyl Alcohol/polyamide for Thorium Capturing From Aqueous Solution

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