Recent advances in layered double hydroxide-based nanomaterials for the removal of radionuclides from aqueous solution

Gu, Ping; Zhang, Sai; Xing, Li; Wang, Xiangxue; Wen, Tao; Jehan, Riffat; Alsaedi, Ahmed; Hayat, Tasawar; Wang, Xiangke

doi:10.1016/j.envpol.2018.04.136

Cited by 401 publications

(127 citation statements)

References 91 publications

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“…With a low alkalinity and a high specific surface area, LDHs have been synthesized conveniently and inexpensively . At present, LDHs are becoming an effective adsorbent through surface modification, calcination and intercalation for radionuclides, such as U(VI), Eu(III), Sr(II) and Th(IV) . In addition, LDHs are also usually used to treat heavy metal contaminants in industrial wastewater.…”

Section: Introductionmentioning

confidence: 92%

In Situ Growth of Layered Double Hydroxides on Sawdust for Pb(II) Adsorption

Gong

Tan

et al. 2019

ChemistrySelect

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In this paper, waste wood (sawdust) was modified with layered double hydroxides (LDHs) to improve its adsorption capacity for Pb(II). The LDHs grew easily and evenly on the sawdust in situ through a hydrothermal method. Then, the functional groups and favorable crystal structures of sawdust/LDHs composites were demonstrated by FTIR and XRD. The results showed that the adsorption capacity of sawdust/LDHs composites for Pb(II) increased by 83.61% compared to sawdust, and the optimum conditions for adsorption were at pH 6 for 180 min with an adsorbent dosage of 3 g/L. Moreover, the behavior of Pb(II) adsorption preferably followed pseudo‐second‐order, Langmuir and Freundlich models, with all the R2 values exceeding 0.97. It was indicated that Pb(II) adsorption occurred on the monolayer and heterogeneous surfaces through chemical bonding and electrostatic interaction. Due to their low cost and high adsorption capacity, the plant‐based composites have great potential in the treatment of lead‐containing wastewater.

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Section: Introductionmentioning

confidence: 92%

In Situ Growth of Layered Double Hydroxides on Sawdust for Pb(II) Adsorption

Gong

Tan

et al. 2019

ChemistrySelect

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“…(a-f) The best agreement between theoretical (red line) and experimental (black line) XRD patterns obtained by varying %RH rates under different pH values(3)(4)(5)(6)(7)(8).…”

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confidence: 89%

“…To date, various conventional and modern technologies are used for reducing the organic pollutant effect on the human health (fauna and flora). Among these technologies, we can mention the ion exchange process which is in relation to the main properties of clay mineral and chemical precipitation and adsorption [1][2][3][4]. All these methods have been developed to separate, to confine, to trap, to isolate, to eliminate, and to protect human life from contaminated effluents.…”

Section: Introductionmentioning

confidence: 99%

Effect of Soil Solution pH during the Tetracycline Intercalation on the Structural Properties of a Dioctahedral Smectite: Microstructural Analysis

Oueslati

2019

Journal of Nanomaterials

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The aim of this work is to quantitatively characterize the structural response to a chemical disruption of saturated montmorillonite crystallites by organic molecules (tetracycline (TC)), derived from pharmaceutical waste. The chemical disturbance is performed by varying the surrounding soil solution pH. To show the effect of this chemical perturbation on the interlamellar space (IS) configuration and the hydration properties, an "in situ" XRD analysis, based on the modeling of the 00l reflections, is carried out. The "in situ" XRD analysis is performed by varying the relative humidity conditions (%RH). FTIR SEM and BET-(Brunauer-Emmett-Teller-) BJH (Barrett-Joyner-Halenda) analyses are used as complementary techniques to confirm the structural changes accompanying the intercalation process. Results showed a dependence between solution acid character and the TC adsorption mechanism. From pH values close to 7, the deprotonation of the TC molecule within IS is accelerated by an increasing %RH rate. IR spectroscopy shows that the structure is preserved versus pH value and only a shift of the water deformation bands ascribed to interlamellar water molecule abundance and TC conformation is observed. The surface morphology studied by SEM shows the increase in the surface porosity by increasing the pH value. BET-specific surface area and BJH pore size distribution (PSD) analyses confirm the SEM observations.

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“…[13,14] For example, surface decoration, calcination, intercalation, andm ultiple composition methods have all been employed to modify LDH materials. [15][16][17][18] Yaoe tal. adopted ac alcination method to improve the adsorption capacity of glycerol-modified MgAl-LDHt owards methyl orange (MO), [19] whilst Yu et al applied an LDH materialt hat had been intercalated with terephthalica cid and pyromellitic acid to decontaminate anilinef rom wastewater.…”

Section: Introductionmentioning

confidence: 99%

Recent Advances in Composites of Graphene and Layered Double Hydroxides for Water Remediation: A Review

Pang

Wang

et al. 2019

Chemistry An Asian Journal

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148

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Composites of layered double hydroxides( LDHs) and graphene (G) are excitingn anomaterials because of their uniques urface structures and excellent physicochemical properties. Such materials offer the advantages of both components,t hat is, the large surfacea rea and ample functional groups of graphene and the outstanding layered structure and ion-exchangeability of layered double hydroxides, whilst effectively avoiding the coagulation of graphene and the instability of pristine layered double hydroxides,a nd they have been widelyi nvestigated for applications in water remediation. This Minireview begins by summarizing the most common methods for the synthesis of G@LDH composites, including hydrothermalt reatment, coprecipitation, and in situ growth. Then, we review the adsorption and catalytic ability of G@LDH materials in the removal of contaminants from water,s uch as heavy metal ions, radionuclides, dyes, and other organic pollutants. Finally,w ed iscusst he challenges and offer ap erspective on the directions of future research of G@LDH composites.

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Recent advances in layered double hydroxide-based nanomaterials for the removal of radionuclides from aqueous solution

Cited by 401 publications

References 91 publications

In Situ Growth of Layered Double Hydroxides on Sawdust for Pb(II) Adsorption

In Situ Growth of Layered Double Hydroxides on Sawdust for Pb(II) Adsorption

Effect of Soil Solution pH during the Tetracycline Intercalation on the Structural Properties of a Dioctahedral Smectite: Microstructural Analysis

Recent Advances in Composites of Graphene and Layered Double Hydroxides for Water Remediation: A Review

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