Efficient defluoridation of water by Monetite nanorods

Shen, Junjie; Evangelista, Marina Franchi; Mkongo, Godfrey; Wen, Haibao; Langford, R. M.; Rosair, Georgina M.; McCoustra, Martin R. S.; Arrighi, Valeria

doi:10.1007/s10450-017-9928-8

Cited by 17 publications

(16 citation statements)

References 44 publications

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“…The intercept of the linear regression in Fig. 4 is a significant deviation from 0 and this would be interpreted as evidence of combined surface resistance and internal diffusion (Câmara et al 2020;Kong et al 2016;Lupul et al 2015;Peralta et al 2019;Rincon-Silva et al 2016;Shen et al 2018;Heyden et al 2018), even though if this was the case the intercept should be negative. The positive intercept is actually a result of the fact that the points used are already outside the range where the first term in the series expansion is sufficient to describe the response.…”

Section: Physical Adsorption On Zeolites: Xylenes On Y Zeolite Beadsmentioning

confidence: 99%

“…The fact that this is a very common methodology in adsorption from solution is evidenced by the fact that (Ho and McKay 1998;Cheung et al 2000;Boyd et al 1947a) are cited well over 1000 times. Only considering issues of the journal Adsorption since 2015, 16 contributions reporting parameters based on linearized plots of these empirical models could be found (Câmara et al 2020;Kong et al 2016;Lupul et al 2015;Peralta et al 2019;Rincon-Silva et al 2016;Shen et al 2018;van der Heyden et al 2018;Bartczak et al 2016;Bazargan et al 2017;Ciesielczyk et al 2016;Marques Fraga et al 2020;Hubetska et al 2020;Morales-Perez et al 2016;Popugaeva et al 2019;De Smedt et al 2015;Yuan et al 2019). This shows that significant effort is being devoted to determining the kinetics of adsorption in liquid systems and it is therefore important to be able to interpret these results correctly and arrive at physical parameters that are directly applicable in the design and simulation of adsorption separation processes.…”

Section: Introductionmentioning

confidence: 99%

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Kinetics of liquid phase batch adsorption experiments

Brandani

2020

Adsorption

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Batch adsorption experiments are carried out by adding a known amount of adsorbent to a liquid solution at a known initial concentration and following the evolution in time of the concentration of the adsorbate. This is a very common method to obtain equilibrium and kinetic information in liquid systems, but in most cases kinetic results are analysed on the basis of empirical models. Two phenomenological models based on macropore diffusion in beads and shrinking core kinetics are used to generate data that are then interpreted with the widely used unconstrained linear regression methods. The results show that for both cases R2 values close to unity are obtained leading to the incorrect interpretation of the mechanism of mass transport. It is recommended that batch adsorption experiments should be analysed using phenomenological models to obtain physical parameters that are applicable to other systems and to reduce the experiments required to characterise fully the kinetics of adsorption.

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Section: Physical Adsorption On Zeolites: Xylenes On Y Zeolite Beadsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Kinetics of liquid phase batch adsorption experiments

Brandani

2020

Adsorption

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“…1a shows the XRD patterns of the mesoporous crystalline monetite structure. [20][21][22][23][24] Further, the X-ray diffraction pattern exhibited two intense peaks at 2q of 26.5 and 30.26 correspond to the calcium hydrogen phosphate. FTIR spectrum of MMT-IEX showed sharp three bands at 1152, 1089 and 950 cm À1 that attributed to P-O stretching vibration of PO 4 .…”

Section: Batch Studies For Cs(i) Ions Adsorption On Mmt-iexmentioning

confidence: 99%

“…In adsorption isotherm experiments, MMT-IEX (30 mg) was immersed in a 20 mL of different cesium ions concentrations at specic pH values with stirring for 90 min at room temperature. [20][21][22][23][24][25] Two distinct sets of pairs of PO 4 units are found in each primitive cell with the P1 space group centered on a symmetric hydrogen bond and the other proton disordered over two centrosymmetrically related positions. 24,25 The monetite (CaHPO 4 ) was prepared by calcination of as-synthesized MT-CA/DA at 500 C for 3 h due to template elimination (cellulose acetate and dodecylamine).…”

Section: Batch Studies For Cs(i) Ions Adsorption On Mmt-iexmentioning

confidence: 99%

“…These advantages render it as promising materials in various applications such as: drug delivery, orthopedics, cancer therapy, biosensors, biological matrixes, and water treatment. [20][21][22][23] The aim of the present study is to design simple and cost effective technique for the synthesis of ordered nanostructured mesoporous calcium hydrogen phosphate (i.e. monetite (MMT-IEX)) sorbent by a sol-gel method for cesium ion removal in an efficient way.…”

Section: Introductionmentioning

confidence: 99%

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Decontamination of radioactive cesium ions using ordered mesoporous monetite

et al. 2018

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Enhancing physicochemical, mechanical, and bioactive performances of monetite nanoparticles reinforced chitosan‐PEO electrospun scaffold for bone tissue engineering

Singh

Mishra

Gupta

et al. 2022

J of Applied Polymer Sci

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In the current work, monetite (DCPA) nanoparticles incorporated chitosan (CH)‐based composite was prepared using by electrospinning technique. A smooth and defect‐free fibrous matrix with an average fiber diameter in the range between 311 ± 13 to 380 ± 28 nm was obtained for 5 wt% (CH‐DCPA5) and 7 wt% DCPA (CH‐DCPA7) containing electrospun scaffolds. The results indicated that the addition of 7 wt% DCPA nanoparticles to chitosan caused an increase in the tensile strength of scaffolds from 6.2 to 12.34 MPa. A slow degradation rate (~37% in 28 days) indicates its suitability for bone tissue regeneration. A study on the biomineralization capability of the electrospun scaffolds after their immersion in simulated body fluid in vitro revealed that the addition of DCPA strongly promoted the deposition of the apatite layer onto electrospun nanofibrous scaffolds. The culture of MG‐63 osteoblast cells on the scaffolds demonstrated that the incorporation of DCPA nanoparticles into the chitosan polymeric matrix helped in the adhesion, spreading, and migration of cells. CH‐DCPA5 and CH‐DCPA7 scaffolds exhibited a higher capacity to proliferate osteoblast cell lines as compared to pure CH scaffold as confirmed by MTT assay and qualitative cell viability analysis from fluorescence microscopy. Immunocytochemistry analysis for osteocalcin expression revealed a higher capacity of DCPA‐containing scaffolds to differentiate MG‐63 cells into bone lineage as compared to pure chitosan scaffolds. DCPA incorporation into chitosan also resulted in MG‐63 cultured on to it to elicit higher alkaline phosphatase activity suggesting the highest capacity of CH‐DCPA7 to differentiate MG 63 cell line among all the scaffolds studied here. The results indicated superior osteogenic properties of DCPA nanoparticle reinforced chitosan matrix for use in BTE in the form of nanofibrous scaffolds.

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Efficient defluoridation of water by Monetite nanorods

Cited by 17 publications

References 44 publications

Kinetics of liquid phase batch adsorption experiments

Kinetics of liquid phase batch adsorption experiments

Decontamination of radioactive cesium ions using ordered mesoporous monetite

Enhancing physicochemical, mechanical, and bioactive performances of monetite nanoparticles reinforced chitosan‐PEO electrospun scaffold for bone tissue engineering

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