Removal of uranium(VI) from aqueous solutions using nanoporous ZnO prepared with microwave-assisted combustion synthesis

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

doi:10.1007/s10967-014-2919-2

Cited by 39 publications

(10 citation statements)

References 33 publications

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“…[21] Recently, Kaynar et al have prepared nanoporous ZnO for removal of uranium. [22] Hallaji et al have synthesized a novel PVA/ZnO nanofiber adsorbent to remove U (VI), Cu (II) and Ni (II) from aqueous solution. [23] Although the as-prepared ZnO have shown large adsorption capacity for uranium due to large specific surface area and rich active surface sites.…”

Section: Introductionmentioning

confidence: 99%

In situ growth of ZnO nanorod arrays on cotton cloth for the removal of uranium(vi)

Zhang

et al. 2015

RSC Adv.

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In situ growth of ZnO nanorod arrays on cotton cloth (ZnO/CC) was proposed to remove uranium (VI) from aqueous solution. The as-prepared adsorbent is easy separation from the reaction medium after adsorption. The effect factors for uranium adsorption, such as solution pH, initial U (VI) concentration, contact time, and temperature have been systematically investigated. The maximum adsorption capacity of uranium (VI) which was calculated by the Langmuir model at pH=5.0 and T=298 K is 431.03 mg g -1 , exhibiting its excellent uranium adsorption properties. It was observed that the kinetic data fit well to the pseudo-second-order kinetic model indicating that the rate-limiting step of adsorption process is chemical adsorption. Moreover, thermodynamic parameters [ΔH 0 =20.26 kJ mol -1 ΔG 0 =-5.66 kJ mol -1 (298 K) ΔS 0 =86.98 J mol -1 K -1 ] reveal that the uranium adsorption is endothermic and spontaneous. Therefore, the ZnO/CC is a potential adsorbent for recovery of uranium (VI) from aqueous solution.

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Section: Introductionmentioning

confidence: 99%

In situ growth of ZnO nanorod arrays on cotton cloth for the removal of uranium(vi)

Zhang

et al. 2015

RSC Adv.

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“…The positive value of ∆H o and entropy (∆S o ) is suggestive of an endothermic nature which is favored and higher randomness of sorption in the system and favors the stability of the at higher temperature. [26]. As shown in…”

Section: Adsorption Thermodynamicsmentioning

confidence: 78%

“…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%

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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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“…7 Additionally, it could avoid using toxic solvents and facilitate resource regeneration. 8 The adsorption material for selectively removing uranium should also possess extremely thermostability and radioactiveresistance due to the strong radioactivity and high temperature of the contained uranium industrial waste water. Therefore, organic resins could not be used in the treatment of waste water of high radioactivity because of their low fusion point.…”

Section: Introductionmentioning

confidence: 99%

Magnesium carbonate basic coating on cotton cloth as a novel adsorbent for the removal of uranium

Zhang

Jing

et al. 2015

RSC Adv.

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Removal of uranium(VI) from aqueous solutions using nanoporous ZnO prepared with microwave-assisted combustion synthesis

Cited by 39 publications

References 33 publications

In situ growth of ZnO nanorod arrays on cotton cloth for the removal of uranium(vi)

In situ growth of ZnO nanorod arrays on cotton cloth for the removal of uranium(vi)

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

Magnesium carbonate basic coating on cotton cloth as a novel adsorbent for the removal of uranium

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