Magnetic metal organic frameworks/graphene oxide adsorbent for the removal of U(VI) from aqueous solution

Wang, Zheng; Zhao, Donglin; Wu, Changnian; Chen, Shaohua; Wang, Yangyang; Chen, Changlun

doi:10.1016/j.apradiso.2020.109160

Cited by 26 publications

(4 citation statements)

References 73 publications

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“…In addition, recent articles have also reported on the potential of magnetic MOFs for the adsorption of heavy metal ions, as summarized in Table 7 . Studies have shown that magnetic MOFs can be used for the efficient removal of a series of harmful metals from contaminated water samples, such as Co(II) [ 190 ], Cr(VI) [ 191 , 192 , 193 , 194 , 195 ], As(V) [ 196 ], Hg(II) [ 197 , 198 ], Pb(II) [ 187 , 192 , 199 , 200 ], U(VI) [ 201 ], Cu(II) [ 199 , 202 , 203 ], and Cd(II) [ 204 ].…”

Section: Magnetic Composites For Water Decontaminationmentioning

confidence: 99%

An Updated Overview of Magnetic Composites for Water Decontamination

Niculescu,

Mihaiescu,

Mihaiescu

et al. 2024

Polymers

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Water contamination by harmful organic and inorganic compounds seriously burdens human health and aquatic life. A series of conventional water purification methods can be employed, yet they come with certain disadvantages, including resulting sludge or solid waste, incomplete treatment process, and high costs. To overcome these limitations, attention has been drawn to nanotechnology for fabricating better-performing adsorbents for contaminant removal. In particular, magnetic nanostructures hold promise for water decontamination applications, benefiting from easy removal from aqueous solutions. In this respect, numerous researchers worldwide have reported incorporating magnetic particles into many composite materials. Therefore, this review aims to present the newest advancements in the field of magnetic composites for water decontamination, describing the appealing properties of a series of base materials and including the results of the most recent studies. In more detail, carbon-, polymer-, hydrogel-, aerogel-, silica-, clay-, biochar-, metal–organic framework-, and covalent organic framework-based magnetic composites are overviewed, which have displayed promising adsorption capacity for industrial pollutants.

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Section: Magnetic Composites For Water Decontaminationmentioning

confidence: 99%

An Updated Overview of Magnetic Composites for Water Decontamination

Niculescu,

Mihaiescu,

Mihaiescu

et al. 2024

Polymers

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“…At 150 • C to 350 • C, the weight of SiO 2 nanofibers changes little, and the HKUST-1 decreases sharply. The weight loss was mainly due to the decomposition of HKUST-1 and the release of Cu-bound molecular water [27][28][29]. The coordination bond between Cu and water can only be broken at temperatures between 120 • C and 300 • C. When the temperature reaches 320 • C, the coordination bonds between Cu begin to break [30].…”

Section: Thermal Stability Analysis Of Composite Fibersmentioning

confidence: 99%

“…They all belonged to SiO 2 nanofibers. In addition, the fitting map of C 1s in Figure 6d displayed that C-C (284.36 eV) was the main carbon functional group, and a small amount of C-N (286.06 eV) and C=O (288.14 eV) functional groups were also present [27].…”

Section: Mechanism Of Adsorption Of Cr (Vi)mentioning

confidence: 99%

Removal of Hexavalent Chromium by Electrospun Silicon Dioxide Nanofibers Embedded with Copper-Based Organic Frameworks

Feng

et al. 2022

Sustainability

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A novel adsorbent copper-based organic skeleton/silicon dioxide (HKUST-1/SiO2) composite nanofiber, which can effectively remove Cr (VI) under synergistic action, has been prepared by embedding growth technique. This adsorbent was characterized by embedded growth of HKUST-1 on inorganic SiO2 electrospun nanofibers, which can remove Cr (VI) in water with the help of adsorption and membrane separation under synergistic action. The results revealed that HKUST-1 was successfully embedded between the pores of SiO2 electrospun nanofibers. The factors affecting the adsorption performance of the composite nanofibers were studied, and the result displayed that the concentration of Cr (VI) solution was 120 mg/L, the best range for pH was 3~7, the adsorption equilibrium was about 45 min, and the maximum adsorption amount was 62.38 mg/g. Compared with the SiO2 fiber without HKUST-1 growth, the adsorptive property of the composite fiber was significantly increased by 15 mg/g. The adsorption process was spontaneous and belonged to the heat absorption reaction, which was consistent with Langmuir adsorption and the pseudo-second-order kinetic model. In addition, HKUST-1/SiO2 NFs can be used for the recovery of chromium resources because the HKUST-1/SiO2 NFs captured Cr (VI) can be calcined and recovered in the later stage, which reduces the consumption of desorption liquid, simplifies the recovery steps, and is conducive to energy saving and emission reduction. Therefore, HKUST-1/SiO2 NFs are expected to be applied in the field of hexavalent chromium wastewater purification and resource recovery.

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“…For instance, Zhao and his co-workers successfully combined Fe 3 O 4 , HKUST-1, and GO to obtain a magnetic sphere hybrid ternary composite (Fe 3 O 4 @HKUST-1/GO) via the hydrothermal method, which possessed excellent properties of a carbonaceous graphene surface with high porosity and adjustability of MOFs and magnetic separation. And the Fe 3 O 4 @HKUST-1/GO exhibited a good adsorption capacity of 268.82 mg∙g −1 towards U(VI) at the initial solution pH value of 4.0 and T = 318 K [ 18 ]. Moreover, amidoxime was reported as the most promising group for U(VI) elimination because of its relatively high affinity and selectivity toward UO 2 2+ .…”

Section: Introductionmentioning

confidence: 99%

Zeolitic Imidazole Framework (ZIF)–Sponge Composite for Highly Efficient U(VI) Elimination

Duan,

Long,

Liu

et al. 2024

Molecules

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Herein, a zeolitic imidazole framework (ZIF-67) composite was prepared by a rapid, simple and inexpensive situ hybridization technique applying polyurethane sponge (PU) as support, which was designated as ZIF-67-PU. The ZIF-67 nanoparticle was successfully supported on the surface of sponge skeletons mainly through electrostatic attraction as well as probable π−π stacking interactions with PAM modification of the sponge. The resultant ZIF-67-PU exhibited a remarkably enhanced U(VI) elimination capacity of 150.86 mg∙g−1 on the basis of the Langmuir isotherm model, in comparison to pristine sponge. Additionally, the mechanism for U(VI) elimination was mainly achieved through the complex reaction between C–N(H)/–OH groups in ZIF-67 and U(VI), based on XPS investigations. ZIF-67-PU represents a simple, feasible and low-cost disposal option for preparing ZIF-coated sponges of any shape that can enhance the U(VI) elimination capacity. Furthermore, this approach can be widely applied to the preparation of various kinds of MOF-sponges through this situ hybridization technique.

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Magnetic metal organic frameworks/graphene oxide adsorbent for the removal of U(VI) from aqueous solution

Cited by 26 publications

References 73 publications

An Updated Overview of Magnetic Composites for Water Decontamination

An Updated Overview of Magnetic Composites for Water Decontamination

Removal of Hexavalent Chromium by Electrospun Silicon Dioxide Nanofibers Embedded with Copper-Based Organic Frameworks

Zeolitic Imidazole Framework (ZIF)–Sponge Composite for Highly Efficient U(VI) Elimination

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