Effective separation of uranium from mine process effluents using chitosan as a recyclable natural adsorbent

Szlachta, Małgorzata; Neitola, Raisa; Peräniemi, Sirpa; Vepsäläinen, Jouko

doi:10.1016/j.seppur.2020.117493

Cited by 48 publications

(15 citation statements)

References 44 publications

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“…After adsorption U(VI), as shown in Fig. S1, a new peak appeared at 925 cm -1 which was assigned to the antisymmetric vibration of the UO2 2+ (Szlachta et al 2020). The peak of -NH (~1577 cm -1 ), the N−H deformation vibration at 1569 cm -1 in t-DOPOR is replaced by two absorption peaks at 1544 and 1572 cm −1 , which related to the protonation and hydration of amino group on the surface of t-DOPOR (Cai et al 2020).…”

Section: Ftir Analysismentioning

confidence: 96%

DOPO-Modified Cellulose Microsphere: Preparation and Application for Selective Adsorption U(VI) under Acidic Solutions

Wen

Cong

Zhang

et al. 2021

Preprint

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Effective radioactive wastewater disposal is of great significance to the wide use of nuclear energy. In this work, 4, 4ˊ-[1, 4-phenyl-bis (9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-yl) dimethyneimino)] diphenol (t-DOPO) was used to modify microcrystalline cellulose microsphere (t-DOPOR) to further enhance it affinity toward U(VI) through radiation method. The t-DOPOR were characterized for structural, morphological, and thermal properties by FTIR, SEM and TGA, which prove that t-DOPO is successfully modified on cellulose. Combination the advantage of cellulose and t-DOPO, t-DOPOR possessed abundant functional group (-OH, -NH and P=O), and exhibited extremely strong affinity toward U(VI) with a maximum adsorption capacity of 51.51 mg/g at pH 3. Particularly, A large distribution, KdU, up to 2.54×104 mL g−1 is found, implying extremely strong affinity toward U(VI) than Ln(III) (La(III), Eu(III), Dy(III), Yb(III)) at the binary system. Dynamic column experiment confirmed that t-DOPOR could separate selectively U(VI) in column experiment. In addition, even in the simulated groundwater trace amount of U(VI) was also eliminated efficiently by t-DOPOR. Lastly, the adsorption mechanism elaborated by XPS analysis was inner-sphere surface complexation between U(VI) and -OH, -NH and P=O groups of t-DOPOR. Overall, the synthesized t-DOPOR may be utilized as a promising adsorbent for separation and remediation of U(VI) from wastewater.

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Section: Ftir Analysismentioning

confidence: 96%

DOPO-Modified Cellulose Microsphere: Preparation and Application for Selective Adsorption U(VI) under Acidic Solutions

Wen

Cong

Zhang

et al. 2021

Preprint

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“…The experiment results were evaluated based on the linearization of these models. The isotherm of Langmuir suggests a limited monolayer coverage; adsorption is localized; adsorption heat is independent of the material adsorbed and, in equilibrium, the adsorption rates are equal to the desorption rates [7,20]. The linear form of the Langmuir adsorption isotherm, Eq.…”

Section: Sorption Isothermsmentioning

confidence: 99%

“…Natural adsorbents have gained more publicity than synthetic polymers. Several types of natural-based adsorbents are used in uranium removal and recovery from its sources, such as cellulose, chitosan [7], silica [8,9], alumina [8], magnesia [10], and other metal oxide species [8][9][10]. The involvement of silica and alumina in the sorbent matrix results in enhanced mechanical, chemical, and textural characteristics of the sorbent matrix.…”

Section: Introductionmentioning

confidence: 99%

A facile and cost-effective adsorbent derived from industrial iron-making slag for uranium removal

Ibrahim

El‐Sheshtawy

El‐Magied

et al. 2021

J Radioanal Nucl Chem

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The Al 2 O 3 -SiO 2 -BFS (AS-BFS) solid adsorbent was developed from blast furnace slag (BFS). The potentiality of the AS-BFS for uranium ion removal from an aqueous medium, via the batch method, was explored and disused in terms of dynamic and isothermal properties. The sorbent exhibited good reusability, a high capacity for uranium ions, and a good specific surface area. The results showed that the sorbent evacuated uranium at about 88.5 mg/g. The sorbent represents a promising waste-derived substitute for other sorbents for water treatment.

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“…[21][22][23] Thus, it is greatly important to remove and recycle uranium from aqueous solutions for environmental conservation, human health, and sustainable development of nuclear energy. [24,25] In the last few decades, various treatment techniques including biological treatments, [26] membrane treatment, [27,28] adsorption, [29][30][31][32] advance oxidation processes, [33] chemical precipitation processes, [34] ion exchange, [35][36][37] and electrochemical method [38][39][40] have been developed to uptake uranium from aqueous solutions. However, most of these methods have various drawbacks.…”

Section: Introductionmentioning

confidence: 99%

Graphene Oxide-based Nanomaterials for Uranium Adsorptive Uptake

Liu¹,

Mao²

2021

ES Mater. Manuf.

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The growth of nuclear power generation and the necessity to acquire uranium reserves for energy security and pollution regulation for environmental protection put much emphasis on the removal and recovery of uranium from aqueous solutions. Adsorption has been proved to be a promising method for this purpose method because of its high adsorption efficiency, easy operation, low cost, reusability and availability of massive adsorbents. Among a wide variety of adsorbents, graphene oxide (GO) has demonstrated excellent adsorption potential for uranium uptake and recovery due to its unique 2D structure, high specific surface area and abundant oxygen-containing functional groups. Regarding the functional groups, it can make GO with high dispersion and hydrophilicity and participate in the complexation of uranium, leading to high adsorption efficiency for uranium. In this review, the research status and progress of GO-based nanomaterials for uranium adsorption are summarized. Their adsorption capacities, influencing factors, kinetics, isotherms and thermodynamics are compared and discussed. The microscopic mechanisms of uranium adsorption onto these GO-based nanomaterials are elaborated at molecular level by spectral analysis, surface complexation models, and theoretical calculations. Meanwhile, the challenges and research trends in the study of uranium adsorption by GO-based nanomaterials are pointed out. We believe that our focused review provides not only a summarizing reference on the current status of uranium removal and recovery by GObased nanomaterials, but also future directions for related follow-up research and practical applications.

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Effective separation of uranium from mine process effluents using chitosan as a recyclable natural adsorbent

Cited by 48 publications

References 44 publications

DOPO-Modified Cellulose Microsphere: Preparation and Application for Selective Adsorption U(VI) under Acidic Solutions

DOPO-Modified Cellulose Microsphere: Preparation and Application for Selective Adsorption U(VI) under Acidic Solutions

A facile and cost-effective adsorbent derived from industrial iron-making slag for uranium removal

Graphene Oxide-based Nanomaterials for Uranium Adsorptive Uptake

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