Zero valent iron/poly(amidoxime) adsorbent for the separation and reduction of U(<scp>vi</scp>)

Shao, Dadong; Wang, Xiangxue; Wang, Xiaolin; Hu, Sheng; Hayat, Tasawar; Alsaedi, Ahmed; Li, Jiaxing; Wang, Suhua; Hu, Jun; Wang, Xiangke

doi:10.1039/c6ra10817b

Cited by 25 publications

(13 citation statements)

References 40 publications

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“…[204] In regard to the relatively low cost and ease of implementation, adsorption is considered as the most economical and effective method in this field. Inorganic adsorbents, [205,206] synthetic polymers [207,208] and new types of nanostructured materials [209,210] have been greatly explored to meet the above-mentioned demands (Figure 7a).…”

Section: Radionuclide Extractionmentioning

confidence: 99%

Emerging Functional Porous Polymeric and Carbonaceous Materials for Environmental Treatment and Energy Storage

Zheng

Lin

Zhang

et al. 2019

Adv Funct Materials

207

118

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The demand for practical and cost-effective environmental treatment and energy storage materials is exploding. Porous polymeric and carbonaceous materials have attracted tremendous interest on account of their welldeveloped porosity and tunable surface chemistry. Functionalization of pore structures further enhances their properties for environmental treatment and energy storage. Herein, the procedures for functionalization of porous structures are introduced, including predesign and postsynthetic strategies. Subsequently, the important advancements of emerging porous polymers for environmental treatment in sorption (e.g., organic micropollutant adsorption, heavy metal ion removal, radionuclide extraction, and oil absorption) and membrane separation (e.g., aqueous micropollutant separation, organic solvent nanofiltration, desalination and pervaporation), as well as for energy storage ranging from the electrodes and separators of batteries to supercapacitor electrodes are highlighted. Moreover, given the combined merits of high intrinsic conductivity, porosity, and physicochemical stability, novel polymer-based porous carbons for energy storage are also highlighted. Key functionalization chemistry for each application is discussed and an in-depth understanding of the structure-property relationships of these functional porous materials is provided. Finally, the challenges and perspectives of emerging functional porous polymeric and carbonaceous materials for environmental treatment and energy storage are proposed.

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Section: Radionuclide Extractionmentioning

confidence: 99%

Emerging Functional Porous Polymeric and Carbonaceous Materials for Environmental Treatment and Energy Storage

Zheng

Lin

Zhang

et al. 2019

Adv Funct Materials

207

118

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“…For mGO-PAO, remarkable weight loss was found at about 320 and 620 °C, which was attributed to the decomposition of amidoxime and polymerized amidoxime groups, respectively. 51,52 The results of TGA analysis proved not only the thermal stability of mGO-PAO but also the successful synthesis of the adsorbent.…”

Section: Resultsmentioning

confidence: 90%

Preparation of Polyamidoxime/Magnetic Graphene Oxide Composite and Its Application for Efficient Extraction of Uranium(VI) from Aqueous Solutions in an Ultrasonic Field

Zhang¹,

Zhang²,

Sui³

et al. 2018

J. Chem. Eng. Data

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In this work, the polyamidoxime functionalized magnetic graphene oxide (mGO-PAO) was prepared via the surface-initiated reversible addition–fragmentation chain transfer (RAFT) polymerization, characterized by TEM, FT-IR, VSM, and TGA techniques, and applied for the extraction of uranium(VI) from aqueous solutions in an ultrasonic field. The effects of pH, contact time, initial uranium(VI) concentration, temperature, and competitive ions on the adsorption of U(VI) were investigated. The adsorption speed of mGO-PAO for U(VI) was found to be 18 times faster in the ultrasonic field than in the shaking mode, and the adsorption equilibrium, to be reached within 2 min. When the U(VI) concentration was 10 mg/L, the temperature, 298 K, and pH, 6.0, the removal rate of U(VI) reached 98.24% with high selectivity. The adsorption kinetics and isotherm data were well described by the pseudo-second-order and Langmuir models, respectively. The thermodynamic parameters suggested that the adsorption of U(VI) was a typical spontaneous and endothermic process. XPS analysis suggested that the mGO-PAO bound the U(VI) through the η2-N,O binding mode. Moreover, the mGO-PAO exhibits excellent adsorption performance in actual radioactive wastewater with an assist of ultrasound. This work provides a new approach for highly effective extraction of U(VI) from the actual radioactive wastewater.

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“…Then, the TMP- g -AO sample has a 13.74% weight loss at 120–340 °C, which may be attributed to the decomposition of the amidoxime groups . Lastly, the weight loss is about 11.07%, which is due to the complete degradation and decomposition of the polymerized amidoxime group when the temperature is above 340 °C . Therefore, the mass ratio of the polymerized amidoxime group to TMP-g and the weight percent of the polymerized amidoxime group in dry TMP- g -AO are 0.423:1 and 29.7%, respectively.…”

Section: Resultsmentioning

confidence: 99%

New Amidoxime-Based Material TMP-g-AO for Uranium Adsorption under Seawater Conditions

Zeng

Zhang

Sui³

et al. 2017

Ind. Eng. Chem. Res.

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A novel amidoxime-based adsorbent of titaniummolybdopyrophosphate-g-amidoxime (TMP-g-AO) was prepared by chemical coprecipitation and subsequent chemical modifications. The successful grafting of acrylonitrile group and the subsequent conversion of acrylonitrile group to amidoxime groups were characterized by scanning electron microscopy-energy dispersive spectroscopy, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, N 2 −BET, and thermal analysis. The adsorption behavior of uranium(VI) on TMP-g-AO was investigated for low concentration uranium solution by batch experiments at a fixed pH of 8.2 ± 0.1. It is found that the adsorption rate of uranium from solution was 99.77% when the uranium concentration was 42.3 μg/L, pH = 8.2 ± 0.1, temperature = 298.15 K, and the adsorbent dosage = 0.05 g. The kinetic data follow the pseudo-second-order model, and adsorption equilibrium data fit the Langmuir model well. The thermodynamics parameters (ΔS, ΔH, and ΔG) indicate that the adsorption process is spontaneous and endothermic. The functional TMP-g-AO adsorbent exhibits good selectivity and affinity for uranium ions under coexisting multimetal ions except for Fe 3+ and Co 2+ . Desorption was performed, and the adsorption rate of uranium by TMP-g-AO only decreased 1.42% after five consecutive adsorption−desorption cycles. In order to evaluate the potential application of TMP-g-AO for uranium extraction from seawater, the experiments on adsorption of uranium(VI) from natural seawater and the uranium-doped seawater were conducted, and the adsorbent exhibited a high adsorption rate of uranium(VI). The results show that TMP-g-AO could be a very promising adsorbent for uranium extraction from seawater.

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Zero valent iron/poly(amidoxime) adsorbent for the separation and reduction of U(vi)

Cited by 25 publications

References 40 publications

Emerging Functional Porous Polymeric and Carbonaceous Materials for Environmental Treatment and Energy Storage

Emerging Functional Porous Polymeric and Carbonaceous Materials for Environmental Treatment and Energy Storage

Preparation of Polyamidoxime/Magnetic Graphene Oxide Composite and Its Application for Efficient Extraction of Uranium(VI) from Aqueous Solutions in an Ultrasonic Field

New Amidoxime-Based Material TMP-g-AO for Uranium Adsorption under Seawater Conditions

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