Effect of Non-Thermal Plasma Modified NiAl Layered Double Hydroxides on the Removal of Fluoride from Aqueous Solution

Lu, Hongxiao; Li, Qiurong; Xiao, Haiyan; Wang, Ranran; Xie, Danyang

doi:10.4236/ajac.2014.59062

Cited by 16 publications

(6 citation statements)

References 36 publications

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“…The previous studies have shown that one of the disadvantages of PCL scaffold is its intrinsic hydrophobic property which decreases cell adhesion on the scaffold surface and as a result, reduces the cell-scaffold interaction (Lu et al 2014 ). Increasing cellular interactions with scaffolds is an important solution for tissue engineering applications.…”

Section: Discussionmentioning

confidence: 99%

Cold atmospheric plasma as a promising approach for gelatin immobilization on poly(ε-caprolactone) electrospun scaffolds

et al. 2019

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Poly(Ɛ-caprolactone) (PCL) is a biocompatible polymer with a high potential to be used in tissue engineering especially in tight tissues. In the current study, cold atmospheric plasma (CAP) is used as a promising method for immobilization of gelatin as a functional biomacromolecule on PCL nanofibrous substrates. The CAP surface modification leads to oxidation of chemical groups existing on the PCL surface without doing any damage to the bulk properties of biomaterials for gelatin biomacromolecule grafting. The water contact angle (WCA) of the CAP-treated surface and gelatin-grafted PCL using CAP indicates an effective increment in the hydrophilicity of the PCL surface. Also to achieve the highest levels of gelatin grafting on the PCL surface, two different grafting methods and gelatin concentration diversity are utilized in the grafting process. The immobilization of gelatin biomacromolecules onto the CAP surface-modified PCL nanofibers is investigated using scanning electron microscope (SEM) and Fourier transform infrared spectroscopy (FTIR). The gelatin-modified PCL substrates revealed uniform nanofibrous morphology with increased average fiber diameter. The results of FTIR spectra, including hydroxyl groups, NH groups, and amide II of gelatin-grafting peaks, confirm the gelatin immobilization on the surface of nanofibers. The metabolic activity of cultured mesenchymal stem cells (MSCs) on the surface-modified scaffolds is evaluated using MTT analysis ( P ≤ 0.05). The results of metabolic activity and also SEM and DAPI staining observations indicate proper attachment on the surface and viability for MSCs on the surface-immobilized nanofibrous scaffolds. Therefore, CAP treatment would be an effective method for biomacromolecule immobilization on nanofibers towards the enhancement of cell behavior.

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Section: Discussionmentioning

confidence: 99%

Cold atmospheric plasma as a promising approach for gelatin immobilization on poly(ε-caprolactone) electrospun scaffolds

et al. 2019

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“…(32) (33) where, b T (J mol −1 ) is Temkin constant which is related to the heat of sorption and K T (L mg −1 ) is Temkin isotherm constant, T (K) the absolute temperature, R is the gas constant 8.31 J mol -1 K -1 .…”

Section: Adsorption Isotherm Modelsmentioning

confidence: 99%

“…In the case of Ni/Al-LDH, it has been reported as highly efficient in the adsorption of metals (Au, Cd, Cu, Pb, Se), 28,32 anions (F -, IO 3 -) 33,34 and organic compounds. [24][25][26]29,35,36 Ni-based LDHs in the energy storage and conversion field are still limited by their intrinsically poor conductivity, aggregation, limited active sites and stability.…”

Section: Introductionmentioning

confidence: 99%

Nickel Removing by Electrocoagulation of Ni(II)-NH3-CO2-SO2-H2O System. Kinetics, Isothermal, Mechanism and Estimated Cost of Operation

Vargas¹,

Medina²,

Vives³

et al. 2022

ACSi

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This study reports nickel removing by electrocoagulation of Ni(II)-NH3-CO2-SO2-H2O system at laboratory scale. Experiments were done using Al/Al pair electrodes at initial nickel concentration between 293 and 1356 mg L–1 and under operation parameters of pH 8.6, current density 9.8 mA cm–2, electrolysis time 30 min, and temperature 60 °C. The obtained results show removal efficiencies between 97.7 and 99.7%. Kinetics modeling suggested combined effects of external diffusion and nucleation, and as controlling step the chemical reaction and a possible autocatalytic contribution. The process followed the Langmuir´s isotherm with a maximum adsorption capacity of 7519 mg g–1. ICP-OES, XRD and FTIR characterization of the precipitates indicated a typical Ni-Al layered double hydroxide structures with 33.4–40.7% nickel and 6.3–7.0% aluminum depending on initial nickel concentration. The operation costs of energy and electrode consumption were 320–537 $ t–1 of removed nickel.

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“…LDHs have attracted a lot of attention as F adsorbents in the recent past. Lu et al [148] assessed F removal based on NiAl layered double hydroxides (NiAl-LDHs) and reported a low equilibrium F concentration of just 0.2388 mg/L in the treated water. Sadik et al [149] also reported high F removal rates of 99.2% for calcined LDHs synthesized from seawater (LDHsw).…”

Section: Layer Double Hydroxidesmentioning

confidence: 99%

Water Defluoridation Methods Applied in Rural Areas over the World

Wambu¹,

Frau²,

Machunda³

et al. 2022

Fluoride

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Overexposure to fluoride (F) through drinking water is the most widespread water problem in the world, but it has now exacerbated due to rapid population growth rates, adverse climatic changes, and increasing levels of water scarcity. Thus, despite the large amounts of data, which has accrued on mitigation methods of high F is still the primary impediment to drinking water programs among many developing nations. The current review chapter on F mitigation techniques applied world-over is aimed at providing a succinct overview of water defluoridation techniques and strategies being used to combat the impact of human F overexposure. It represents a starting point to understand the prospects of reducing the global F impact. It is anticipated that this work will lay a strong foundation for this and also inform strategies for safeguarding public health and the environment from F pollution.

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Effect of Non-Thermal Plasma Modified NiAl Layered Double Hydroxides on the Removal of Fluoride from Aqueous Solution

Abstract: Abstract

Cited by 16 publications

References 36 publications

Cold atmospheric plasma as a promising approach for gelatin immobilization on poly(ε-caprolactone) electrospun scaffolds

Cold atmospheric plasma as a promising approach for gelatin immobilization on poly(ε-caprolactone) electrospun scaffolds

Nickel Removing by Electrocoagulation of Ni(II)-NH3-CO2-SO2-H2O System. Kinetics, Isothermal, Mechanism and Estimated Cost of Operation

Water Defluoridation Methods Applied in Rural Areas over the World

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