Preparation of fluoride adsorbent by resource utilization of carbide slag from industrial waste

Ren, Yuanchuan; Tong, Jia; Qu, Guangfei; Ning, Ping; Ren, Nanqi; Zhang, Chaoneng; Wu, Fang; Yang, Yuyi; Chen, Xiuping; Wang, Zuoliang; Hu, Yan; Wang, Jun; Lu, Ping

doi:10.1016/j.jece.2022.108632

Cited by 6 publications

(2 citation statements)

References 55 publications

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“…It was noticed that as the dosage rose from 0.01 g to 0.2 g, the adsorption capacity gradually declined from 480 mg/g to 100.5 mg/g. Similar findings were also obtained for fluoride adsorption by PAA@C-CS and modified chitosan [57,58]. This was due to the constant initial concentration of fluoride.…”

Section: Effect Of Dosagesupporting

confidence: 85%

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Phosphogypsum-Modified Vinasse Shell Biochar as a Novel Low-Cost Material for High-Efficiency Fluoride Removal

Liu,

Zhang,

Mou

2023

Molecules

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In this study, vinasse shell biochar (VS) was easily modified with phosphogypsum to produce a low-cost and novel adsorbent (MVS) with excellent fluoride adsorption performance. The physicochemical features of the fabricated materials were studied in detail using SEM, EDS, BET, XRD, FTIR, and XPS techniques. The adsorption experiments demonstrated that the adsorption capacity of fluoride by MVS was greatly enhanced compared with VS, and the adsorption capacity increased with the pyrolysis temperature, dosage, and contact time. In comparison to chloride and nitrate ions, sulfate ions significantly affected adsorption capacity. The fluoride adsorption capacity increased first and then decreased with increasing pH in the range of 3–12. The fluoride adsorption could be perfectly fitted to the pseudo-second-order model. Adsorption isotherms matched Freundlich and Sips isotherm models well, giving 290.9 mg/g as the maximum adsorption capacity. Additionally, a thermodynamic analysis was indicative of spontaneous and endothermic processes. Based on characterization and experiment results, the plausible mechanism of fluoride adsorption onto MVS was proposed, mainly including electrostatic interactions, ion exchange, precipitation, and hydrogen bonds. This study showed that MVS could be used for the highly efficient removal of fluoride and was compatible with practical applications.

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Section: Effect Of Dosagesupporting

confidence: 85%

“…ings were also obtained for fluoride adsorption by PAA@C-CS and modified chitosan [57,58]. This was due to the constant initial concentration of fluoride.…”

Section: Effect Of Dosagementioning

confidence: 77%

Phosphogypsum-Modified Vinasse Shell Biochar as a Novel Low-Cost Material for High-Efficiency Fluoride Removal

Liu,

Zhang,

Mou

2023

Molecules

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Structure and Properties of Cellulose Strengthened Poly(Acrylic Acid) Hydrogels

Chen,

Zhao,

et al. 2024

Macro Materials & Eng

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Poly(acrylic acid) (PAAc) hydrogels are essential functional materials. However, their mechanical properties do not meet the required standards. In this study, a one‐pot method is employed to prepare cellulose‐reinforced PAAc hydrogels by dissolving allyl cellulose (AC) in acrylic acid (AAc) solutions. Fourier transform infrared (FTIR), solid‐state 13C nuclear magnetic resonance (NMR), and thermogravimetric (TG) analysis are used to demonstrate that the incorporation of AC results in the formation of covalent and hydrogen bonds, which contribute to the crosslink network of the PAAc hydrogels. Significantly, by modifying the ratio of AC to AAc in the pre‐polymerization solution, the prepared AC–PAAc hydrogels exhibit a transition from transparent to opaque. This suggests that phase separation is induced by hydrogen bonding. The occurrence of phase separation is verified by observing the hydrogel microstructures using scanning electron microscopy. Phase separation leads to enhanced polymer–polymer interactions in the hydrogels, resulting in a maximum fracture stress of 2.34 MPa. The AC–PAAc hydrogels display distinct swelling behavior under various pH conditions. Moreover, they demonstrate differences in transparency and mechanical properties when exposed to dimethyl sulfoxide (DMSO) and water, indicating their responsiveness to solvents. This work demonstrates the great potential of enhancing the mechanical performance and responsiveness of PAAc hydrogels.

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Extraction and preparation of metal organic frameworks from secondary aluminum ash for removal mechanism study of fluoride in wastewater

Ren¹,

Wu²,

Qu³

et al. 2023

Journal of Materials Research and Technology

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Preparation of fluoride adsorbent by resource utilization of carbide slag from industrial waste

Cited by 6 publications

References 55 publications

Phosphogypsum-Modified Vinasse Shell Biochar as a Novel Low-Cost Material for High-Efficiency Fluoride Removal

Phosphogypsum-Modified Vinasse Shell Biochar as a Novel Low-Cost Material for High-Efficiency Fluoride Removal

Structure and Properties of Cellulose Strengthened Poly(Acrylic Acid) Hydrogels

Extraction and preparation of metal organic frameworks from secondary aluminum ash for removal mechanism study of fluoride in wastewater

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