New network polymer functionalized magnetic-mesoporous nanoparticle for rapid adsorption of Hg(II) and sequential efficient reutilization as a catalyst

Fu, Yong; Sun, Yu; Yangwen, Zheng; Jiang, Jun; Yang, Chengyue; Wang, Jiwei; Hu, Jianshe

doi:10.1016/j.seppur.2020.118112

Cited by 39 publications

(20 citation statements)

References 53 publications

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“…Concerning its crystalline state, the magnetic core was not affected by the procedures applied for the preparation of the adsorbent. The polymer coating was wrapped around the black magnetic nanoparticles and cross-linked pores were randomly distributed, attached on the surface of the magnetic carrier ( Figure 3 ) [ 25 ].…”

Section: Synthetic Routes and Characterizationsmentioning

confidence: 99%

“…Moreover, at higher pH values (4–6), the phenomenon of a formation of Hg(II) hydroxide species, including Hg(OH) + (soluble) and Hg(OH) 2 (insoluble precipitate), occurs, resulting in the blockage of the active site of pores and of MCTP, and thus the consequent decrease in the overall adsorption capacity. However, the optimum adsorption capacity (mg/g) was achieved at pH 3.5 [ 25 ].…”

Section: Adsorption Evaluationmentioning

confidence: 99%

“…However, the obtained value of Q max, exp (515.46 mg/g) is in agreement with the L isotherm model (Q max,cal = 506.39 mg/g), while the good mathematical fitting of the L isotherm model indicates a monolayer adsorption of Hg(II) metal ions on the surface of MCTP. Thus, according to the experimental results, it can be concluded that, with the use of MCTP in acidic aqueous media, the Hg(II) metal ions from an aqueous solution can be removed [ 25 ].…”

Section: Adsorption Evaluationmentioning

confidence: 99%

“…The first straight line indicates the film diffusion and the quick adsorption of Hg(II) from the synthesized aqueous solution on the surface of MCTP, while the I-PD process occurs when the Hg(II) ion is transported slowly to the interior structure of MCTP through a pore diffusion process. The final stage of equilibrium can be achieved with the complete occupation of the available binding sites [ 25 ].…”

Section: Adsorption Evaluationmentioning

confidence: 99%

“…More specifically, according to the FTIR analysis of MCTP, the signals at 1628 cm −1 (C=N) and 1309 cm −1 (C-N) decreased, especially the C-N peak intensity. However, the band at 3426 cm −1 shifted to 3405 cm −1 (corresponding to -OH or -NH2 stretching vibration), which is a result that implies that the N or O groups might participate in the adsorption of Hg (II) [ 25 ].…”

Section: Adsorption Evaluationmentioning

confidence: 99%

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Adsorption of Uranium, Mercury, and Rare Earth Elements from Aqueous Solutions onto Magnetic Chitosan Adsorbents: A Review

et al. 2021

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The compound of chitin is the second most important and abundant natural biopolymer in the world. The main extraction and exploitation sources of this natural polysaccharide polymer are mainly crustaceans species, such as shrimps and crabs. Chitosan (CS) (poly-β-(1 → 4)-2-amino-2-deoxy-d-glucose) can be derived from chitin and can be mentioned as a compound that has high value-added applications due to its wide variety of uses, including pharmaceutical, biomedical, and cosmetics applications, food etc. Furthermore, chitosan is a biopolymer that can be used for adsorption applications because it contains amino and hydroxyl groups in its chemical structure (molecules), resulting in possible interactions of adsorption between chitosan and pollutants (uranium, mercury, rare earth elements (REEs), phenols, etc.). However, adsorption is a very effective, fast, simple, and low-cost process. This review article places emphasis on recent demonstrated research papers (2014–2020) where the chemical modifications of CS are explained briefly (grafting, cross-linking etc.) for the uptake of uranium, mercury, and REEs in synthesized aqueous solutions. Finally, figures and tables from selected synthetic routes of CS are presented and the effects of pH and the best mathematical fitting of isotherm and kinetic equations are discussed. In addition, the adsorption mechanisms are discussed.

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Section: Synthetic Routes and Characterizationsmentioning

confidence: 99%

Section: Adsorption Evaluationmentioning

confidence: 99%

Section: Adsorption Evaluationmentioning

confidence: 99%

Section: Adsorption Evaluationmentioning

confidence: 99%

Section: Adsorption Evaluationmentioning

confidence: 99%

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Adsorption of Uranium, Mercury, and Rare Earth Elements from Aqueous Solutions onto Magnetic Chitosan Adsorbents: A Review

et al. 2021

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Reusable Polyacrylonitrile‐Sulfur Extractor of Heavy Metal Ions from Wastewater

Peng

Jiang

Barr

et al. 2021

Adv Funct Materials

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Mercury, lead, and cadmium are among the most toxic and carcinogenic heavy metal ions (HMIs), posing serious threats to the sustainability of aquatic ecosystems and public health. There is an urgent need to remove these ions from water by a cheap but green process. Traditional methods have insufficient removal efficiency and reusability. Structurally robust, large surface‐area adsorbents functionalized with high‐selectivity affinity to HMIs are attractive filter materials. Here, an adsorbent prepared by vulcanization of polyacrylonitrile (PAN), a nitrogen‐rich polymer, is reported, giving rise to PAN‐S nanoparticles with cyclic π‐conjugated backbone and electronic conductivity. PAN‐S can be coated on ultra‐robust melamine (ML) foam by simple dipping and drying. In agreement with hard/soft acid/base theory, N‐ and S‐containing soft Lewis bases have strong binding to Hg2+, Pb2+, Cu2+, and Cd2+, with extraordinary capture efficiency and performance stability. Furthermore, the used filters, when collected and electrochemically biased in a recycling bath, can release the HMIs into the bath and electrodeposit on the counter‐electrode as metallic Hg0, Pb0, Cu0, and Cd0, and the PAN‐S@ML filter can then be reused at least 6 times as new. The electronically conductive PAN‐S@ML filter can be fabricated cheaply and holds promise for scale‐up applications.

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Preparation of Self‐Assembled Starch‐Based Organometallic Polymers and Their Efficient Adsorption of Mercury Ion in Water

et al. 2023

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Herein, a newly‐developed material called Thiourea@WOx/Starch Polymer (TH@WOx/SP) is prepared by a one‐pot and high yield solvothermal method. It is not only equipped with porous structure but also has a superior adsorption capacity. The relevant characterizations and adsorption performance are analyzed by scanning electron microscopy (SEM), thermogravimetric analysis (TGA), X‐ray diffraction (XRD), X‐ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FTIR), Zeta potential analysis, and differential pulse voltammetry (DPV). Surprisingly, with its abundant active sites, the TH@WOx/SP reveals its excellent adsorption capacity for heavy metal and organics dye, as high as 2201.16 mg g−1 for Hg(II) and 175.01 mg g−1 for methylene blue (MB), finished within 30 and 90 min, respectively. These satisfactorily fast and high adsorption capacities not only come down to its concave–convex structure, but also to its enriched functional groups serving as anchor sites for Hg(II) and MB. The adsorption mechanism of Hg(II) and MB on TH@WOx/SP is carefully evaluated, which can be attributed to covalent coordination, ion exchange, π–π interactions, hydrogen bonds, and electrostatic attraction. This work designs a new strategy to develop a novel porous metal organic polymer adsorbents and demonstrates its prospective application in the field of adsorption.

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New network polymer functionalized magnetic-mesoporous nanoparticle for rapid adsorption of Hg(II) and sequential efficient reutilization as a catalyst

Cited by 39 publications

References 53 publications

Adsorption of Uranium, Mercury, and Rare Earth Elements from Aqueous Solutions onto Magnetic Chitosan Adsorbents: A Review

Adsorption of Uranium, Mercury, and Rare Earth Elements from Aqueous Solutions onto Magnetic Chitosan Adsorbents: A Review

Reusable Polyacrylonitrile‐Sulfur Extractor of Heavy Metal Ions from Wastewater

Preparation of Self‐Assembled Starch‐Based Organometallic Polymers and Their Efficient Adsorption of Mercury Ion in Water

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