Study of adsorption performance and adsorption mechanism for U(VI) ion on modified polyacrylonitrile fibers

Wang, Fan; Wang, Xinglei; Jiang, Yunjie; Niu, Zhiwei; Wu, Wangsuo; Zhang, Hongxia

doi:10.1007/s10967-019-06928-5

Cited by 21 publications

(10 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For O 1s, Wang et al [78] identified three peaks, on amidoximated-PAN fibers, at 531.18 eV, 530.34 eV and 529.54 eV corresponding to eOH, eNO and eCO groups, respectively. For amidoximated eMOF, Li et al [81] showed substantially higher binding energies for eOH, C]O and CeO groups at 531.4 eV, 532.1 eV and 532.9 eV, respectively.…”

Section: Ftir Analysismentioning

confidence: 99%

“…After strontium binding, the BEs of the signals are weakly shifted by 0.15 eV toward higher BE for N]CeOH (proving the donation of lone pair of electrons from N through the coordination of Sr(II) with N[83]) and lower energy for NH 2 . Wang et al[78] investigated uranyl sorption on hydrolyzed amidoximated-PAN fibers and observed that the signal corresponding to eNH 2 was slightly shifted after U(VI) binding; while eNOH bond did not appear to be affected by metal binding and a new peak assigned to N-U complexation (around BE = 404.68 eV) appeared. Here also, consistently with Wang et al[78], a new weak band appears at 405.3 eV, which is associated with the direct interaction of the metal with N (from amino groups).…”

mentioning

confidence: 99%

“…Wang et al[78] investigated uranyl sorption on hydrolyzed amidoximated-PAN fibers and observed that the signal corresponding to eNH 2 was slightly shifted after U(VI) binding; while eNOH bond did not appear to be affected by metal binding and a new peak assigned to N-U complexation (around BE = 404.68 eV) appeared. Here also, consistently with Wang et al[78], a new weak band appears at 405.3 eV, which is associated with the direct interaction of the metal with N (from amino groups). However, compared with PMAA/…”

mentioning

confidence: 99%

See 2 more Smart Citations

Controlled bi-functionalization of silica microbeads through grafting of amidoxime/methacrylic acid for Sr(II) enhanced sorption

Wei

Rakhatkyzy

Salih

et al. 2020

Chemical Engineering Journal

View full text Add to dashboard Cite

show abstract

Section: Ftir Analysismentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

See 1 more Smart Citation

Controlled bi-functionalization of silica microbeads through grafting of amidoxime/methacrylic acid for Sr(II) enhanced sorption

Wei

Rakhatkyzy

Salih

et al. 2020

Chemical Engineering Journal

View full text Add to dashboard Cite

show abstract

“…For the regeneration of fibrous ion exchangers, a less regenerating solution is required in comparison with granular ion exchangers (Kopylova et al, 2006). In this regard, fibers are widely used both for wastewater treatment from various ions (Xu et al, 2021;Grachek et al, 2020;Wang et al, 2020) and for the recovery of rare earth elements (Li et al, 2020).…”

Section: Materials (Vion Kn-1)mentioning

confidence: 99%

Study of the Sorption of Ammonium Cations on a Fibrous Carboxylic Sorbent

Peregudov¹,

Горбунова²,

Obidov³

et al. 2021

PTQ

View full text Add to dashboard Cite

Background: Wastewater from the mineral fertilizer production, agribusiness containing ammonium ions causes significant harm to fish farming; therefore, it must be purified before discharge. Ion-exchange sorption is a promising method for isolating ammonium cations. The object of the study was a chemisorption fiber VION KN-1, which has developed surface and high sorption rate. Purpose: To study the sorption kinetics of ammonium cations from aqueous solutions on VION KN-1; to train an ANN to predict the degree of recovery of ammonium ions from wastewater using Statistica Neural Networks Version 13. Methods: The ammonium ion concentration in the solution was established by direct potentiometry. Sorption isotherms were constructed using the method of variable concentrations. To determine the limiting stage, the obtained kinetic dependencies were represented in the coordinates of the Boyd-Adamson equations for internal/external diffusion. Results and Discussion: During sorption from solutions with different ammonium nitrogen contents, the values of distribution coefficients (Kd) are at the level of 2.3ꞏ103 cm3/g, which significantly exceeds this parameter for granular ionites. Experimental sorption data were verified using Freundlich (R2 = 0.9224) and Langmuir (R2 = 0.9996) isotherms. The maximum degree of recovery (over 96 %) was achieved by passing a solution with a concentration of 11.3 mmol/dm3. Using an array of experimental data, the MLP-3-5-1 neural network was trained. The coefficient of determination R2 = 0.999420 obtained for the training sample characterizes high network performance. Conclusions: The Langmuir equation better describes the process of NH4+ sorption on a fibrous sorbent. It is reasonable to use VION KN-1 at the fine treatment stage. Ammonium ion desorption from the fiber was performed by acid solution. The resulting solutions of ammonium salts can be used as liquid fertilizers. The trained neural networks can be used to predict the degree of recovery of ammonium ions by sorbent VION KN-1.

show abstract

“…The remarkable development of nuclear activities related to U such as mining, refinement and recovery of U is of critical importance for the continued development of nuclear energy 1,2 . To decrease the release of U into the environment and contamination risks in case of incidents or nuclear events, an adsorption approach based on various high-efficiency sorbents has been proposed and attracted considerable attentions [3][4][5][6][7] . Adsorption has been examined as an alternative method to remove U from aqueous solutions due to its simple operation, low cost, energy saving, high efficiency, etc Cellulose and their derivatives have achieved extensive attention due to their advantages such as the most abundant resource, biocompatibility, inexpensiveness and eco-friendliness 8,9 .…”

mentioning

confidence: 99%

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

Yang

Wang

Zhu

2020

Sci Rep

View full text Add to dashboard Cite

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.

show abstract

Study of adsorption performance and adsorption mechanism for U(VI) ion on modified polyacrylonitrile fibers

Cited by 21 publications

References 37 publications

Controlled bi-functionalization of silica microbeads through grafting of amidoxime/methacrylic acid for Sr(II) enhanced sorption

Controlled bi-functionalization of silica microbeads through grafting of amidoxime/methacrylic acid for Sr(II) enhanced sorption

Study of the Sorption of Ammonium Cations on a Fibrous Carboxylic Sorbent

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

Contact Info

Product

Resources

About