Adsorption capacity of kelp-like electrospun nanofibers immobilized with bayberry tannin for uranium(<scp>vi</scp>) extraction from seawater

Meng, Jie; Lin, Xiaoyan; Li, Haonan; Zhang, Yida; Zhou, Jianqin; Chen, Yan; Shang, Ran; Luo, Xin

doi:10.1039/c8ra09297d

Cited by 41 publications

(12 citation statements)

References 53 publications

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“…With increasing solution pH when U is mainly present as negatively charged species (UO 2 ) 3 (OH) 7 - and (UO 2 )(OH) 3 - , the removal efficiency increased due to the electrostatic attraction between the negatively charged U(VI) species and the positively charged sorbent 56 . When the pH further increased, the hydrolysation of UO 2 2+ and formation of U(VI)-carbonate species (UO 2 ) 2 (CO 3 )(OH) 3− inhibited the U(VI) adsorption, which decreased the adsorption capacity 57 . Therefore, an optimal pH of 3.0 was used in subsequent experiments.…”

Section: Resultsmentioning

confidence: 99%

Facile preparation and adsorption performance of low-cost MOF@cotton fibre composite for uranium removal

Yang

Wang

Zhu

2020

Sci Rep

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A novel composite MOF@cotton fibre (HCF) was prepared and characterized by FTIR, SEM, XPS and TGA. The effect of various parameters on the adsorption efficiency, such as the solution pH, contact time, initial U(VI) concentration and temperature, was studied. The maximal sorption capacity (Qm) is 241.28 mg g−1 at pH 3.0 for U(VI) according to the Langmuir isotherm adsorption model, and the kinetic and thermodynamic data reveal a relatively fast entropy-driven process (ΔH0 = 13.47 kJ mol−1 and ΔS0 = 75.47 J K−1 mol−1). The removal efficiency of U(VI) by HCF is comparable with that of pure cotton fibre and as-prepared MOF (noted as HST). However, the HST composite with cotton fibre significantly improved the treatment process of U(VI) from aqueous solutions in view of higher removal efficiency, lower cost and faster solid–liquid separation. Recycling experiments showed that HCF can be used up to five times with less than 10% efficiency loss.

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Section: Resultsmentioning

confidence: 99%

Facile preparation and adsorption performance of low-cost MOF@cotton fibre composite for uranium removal

Yang

Wang

Zhu

2020

Sci Rep

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“…The neutral dyes of MB and RhB were adsorbed because of the π–π stacking and the hydrogen‐bonding interactions between dye molecules and hydrogel species. [ 45 ] The least yield of adsorption was observed for the negatively charged dye, RBg, owing to its repulsive electrostatic interaction with negatively charged graphene surface, [ 46 ] which is yet in competition with resulted in π–π stacking and the hydrogen bonding interactions. The UV spectra in Figure 9 in line with observations of adsorption experiment cuvettes in Figure , clearly revealed that the order of adsorption affinity is as follows: positively charged > neutral > negatively charged dyes as there are different interactions between each dye and rGOSH.…”

Section: Resultsmentioning

confidence: 99%

Self‐Assembled Graphene Hydrogel Composites for Selective Dye Removal

Subhi

Kiamahalleh

Firouzi

et al. 2020

Advanced Sustainable Systems

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Graphene‐based hydrogels are known as promising amphiphilic agents for water uptake and selective organic contaminant removal. However, it is a challenge to prevent graphene sheet restacking during the gelation as this factor significantly influences the adsorption behavior of organic contaminant. A porous reduced graphene oxide‐starch hydrogel (rGOSH) with enhanced pore size is produced by a simple one‐step method through starch‐directed self‐assembly of graphene sheets. This hydrogel demonstrated to be a promising candidate for the selective removal of organic dye molecules, where positive and neutral dyes are adsorbed, and the negative one is repelled. In particular, the hydrogel prepared with incorporation of starch between the graphene sheets, adsorbs positively charged dye ≈75% more than reduced graphene oxide hydrogel, due to better diffusion into larger pore size and strong electrostatic interaction with negatively charged oxygen groups. Furthermore, the Langmuir isotherm model and kinetic studies for dyes adsorption onto rGOSH reveal that the adsorption mechanisms are dominantly chemisorption within the porous hydrogel structure since the experimental data can be well fitted to the pseudo‐second‐order dynamic equation with the highest adsorption capacity (1106.950 µg g−1) and kinetic (1.957E‐05 g µg−1 min−0.5) toward the positively charged dye.

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“…Many types of sustainable materials have been fabricated by electrospinning, including adsorption [96] and filter materials [71] used in environmental management, bioengineering materials with biological affinity [28], and drug delivery vehicles that regulate the rate of drug release [97]. For example, as a manufacturing technique for biomedical materials, Meng et al [98] electrospun gelatin/polyvinyl alcohol-based materials, and Cheng et al [28] electrospun a biodegradable cellulose nanocrystal membrane. Both of them overcome the limitation of cell adhesion and migration by adjusting the hydrophobicity of the nanofiber membrane.…”

Section: Application Of Electrospun Sustainable Composite Materialsmentioning

confidence: 99%

Recent Advances in Electrospun Sustainable Composites for Biomedical, Environmental, Energy, and Packaging Applications

Líu

Gough

Deng

et al. 2020

IJMS

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Electrospinning has gained constant enthusiasm and wide interest as a novel sustainable material processing technique due to its ease of operation and wide adaptability for fabricating eco-friendly fibers on a nanoscale. In addition, the device working parameters, spinning solution properties, and the environmental factors can have a significant effect on the fibers’ morphology during electrospinning. This review summarizes the newly developed principles and influence factors for electrospinning technology in the past five years, including these factors’ interactions with the electrospinning mechanism as well as its most recent applications of electrospun natural or sustainable composite materials in biology, environmental protection, energy, and food packaging materials.

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Adsorption capacity of kelp-like electrospun nanofibers immobilized with bayberry tannin for uranium(vi) extraction from seawater

Abstract: A novel kelp-like gelatin/PVA composite nanofiber band loaded with bayberry tannin was fabricated for the extraction of uranium(vi) from seawater.

Cited by 41 publications

References 53 publications

Facile preparation and adsorption performance of low-cost MOF@cotton fibre composite for uranium removal

Facile preparation and adsorption performance of low-cost MOF@cotton fibre composite for uranium removal

Self‐Assembled Graphene Hydrogel Composites for Selective Dye Removal

Recent Advances in Electrospun Sustainable Composites for Biomedical, Environmental, Energy, and Packaging Applications

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