Ammonium molybdophosphate/metal-organic framework composite as an effective adsorbent for capture of Rb+ and Cs+ from aqueous solution

Wang, Yanping; Li, Kexin; Fang, Daqing; Ye, Xiushen; Liu, Haining; Tan, Xiaoli; Li, Quan; Li, Jun; Wu, Zhijian

doi:10.1016/j.jssc.2021.122767

Cited by 21 publications

(3 citation statements)

References 53 publications

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“…This proved that Fe 3 O 4 @ZIF-8 has adsorption capacity for arsenic. The Fe 3 O 4 @ZIF-8 before adsorption detected C, N, O, Fe and Zn elements, which were consistent with the elemental composition of the Fe 3 O 4 @ZIF-8 material, which proved that the metal-organic framework composite was successfully synthesized [ 25 ].…”

Section: Resultssupporting

confidence: 61%

Removal of Arsenic from Wastewater by Using Nano Fe3O4/Zinc Organic Frameworks

Huang

Liu

Wang

et al. 2022

IJERPH

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Efficient removal of arsenic in wastewater is of fundamental importance due to the increasingly severe arsenic pollution. In this study, a new composite adsorbent (Fe3O4@ZIF-8) for As(V) removal from wastewater was synthesized by encapsulating magnetic Fe3O4 nanoparticles into metal organic frameworks. In order to evaluate the feasibility of Fe3O4@ZIF-8 as an adsorbent for As(V) removal, the adsorption properties of Fe3O4@ZIF-8 were systematically explored by studying the effects of dosage, pH, adsorption isotherm, kinetics, and thermodynamics. Additionally, the characterization of Fe3O4@ZIF-8 before and after adsorption was analyzed thoroughly using various tests including SEM-EDS, XPS, BET, XRD, TG, FTIR, and the properties and arsenic removal mechanism of the Fe3O4@ZIF-8 were further studied. The results showed that the Fe3O4@ZIF-8 has a specific surface area of 316 m2/g and has excellent adsorption performance. At 25 °C, the initial concentration of arsenic was 46.916 mg/L, and pH 3 was the optimum condition for the Fe3O4@ZIF-8 to adsorb arsenic. When the dosage of the Fe3O4@ZIF-8 was 0.60 g/L, the adsorption of arsenic by the Fe3O4@ZIF-8 can reach 76 mg/g, and the removal rate can reach 97.20%. The adsorption process of arsenic to the Fe3O4@ZIF-8 can be well described by the Langmuir isotherm model and the second-order kinetic equation. At pH 3 and temperature 298 K, the maximum adsorption capacity of arsenic by the Fe3O4@ZIF-8 was 116.114 mg/g. Through the analysis of thermodynamic parameters, it is proved that the adsorption process of arsenic by the Fe3O4@ZIF-8 is a spontaneous endothermic reaction. The Fe3O4@ZIF-8 has broad prospects for removing As(V) pollution in wastewater, because of its strong adsorption capacity, good water stability, and easy preparation.

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Section: Resultssupporting

confidence: 61%

Removal of Arsenic from Wastewater by Using Nano Fe3O4/Zinc Organic Frameworks

Huang

Liu

Wang

et al. 2022

IJERPH

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“…The higher correlation coefficient for the Langmuir model indicated that the Langmuir model was more suitable to describe the adsorption mechanism and the adsorption was a monolayer homogeneous adsorption process. 32 The maximum exchange capacity of ACS-1.0 beads for Cs + in strongly acidic solutions (3.0 mol/L HNO 3 ) was determined to be 23.9 mg/g. Table 3 presented the maximum exchange capacities of ACS-1.0 beads obtained in this study and reported other AMP-based composites under acidic conditions.…”

Section: Resultsmentioning

confidence: 96%

“…The related parameters of Cs + adsorption on ACS-1.0 beads are calculated from the two models, and the results are listed in Table . The higher correlation coefficient for the Langmuir model indicated that the Langmuir model was more suitable to describe the adsorption mechanism and the adsorption was a monolayer homogeneous adsorption process . The maximum exchange capacity of ACS-1.0 beads for Cs + in strongly acidic solutions (3.0 mol/L HNO 3 ) was determined to be 23.9 mg/g.…”

Section: Resultsmentioning

confidence: 99%

Silica-Reinforced AMP–Calcium Alginate Beads for Efficient and Selective Removal of Cesium from a Strong Acidic Medium

Jin,

Diao,

Fan

et al. 2024

ACS Omega

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Due to the significant selectivity for Cs + , ammonium molybdophosphate (AMP) possesses potential to uptake radiocesium from high-level liquid waste (HLLW), whereas its micro-crystalline structure and fine powder morphology limit its industrial application. Although the granulation method with alginate is prospective for the preparation of an AMP exchanger, the mechanical strength of obtained beads may be insufficient for application. In this context, we prepared silica-reinforced AMP− calcium alginate (ACS) beads and evaluated their performance for Cs + removal from strong acidic solutions. It was found that the addition of silica in the fabrication significantly improved the mechanical strength of the beads in comparison to those without silica. Notably, the beads with an AMP/silica mass ratio of 1.0 exhibited an exceptional mechanical strength, surpassing that of ACS beads composed of other components. The batch experiment results indicated that the Cs + adsorption follows a non-linear pseudo-secondorder rate equation. The distribution coefficient of Cs + was high even in extreme acidic conditions (∼1.6 × 10 2 mL/g in 8.0 mol/L HNO 3 solution). The Cs + adsorption can be well fitted with the Langmuir model, and the estimated maximum exchange capacity in 3.0 mol/L HNO 3 could reach 23.9 mg/g. More importantly, ACS beads showed excellent selectivity toward Cs + uptake over eight co-existing metal ions in simulated HLLW, with separation factor values all above 145. The column experiment exhibited that the beads can serve as the stationary phase in columns to effectively remove Cs + . The findings of this study are significant as they provide insights into the development of efficient materials for radiocesium removal from high-level liquid waste. The results demonstrate the potential of silica-reinforced ACS beads for Cs + adsorption, with promising applications in industrial settings.

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