Water defluoridation using Al2O3 nanoparticles synthesized by flame spray pyrolysis (FSP) method

Tangsir, Sareh; Hafshejani, Laleh Divband; Lähde, Anna; Maljanen, Marja; Hooshmand, Abdolrahim; Naseri, Abd Ali; Mirfazaelian, Hadi; Jokiniemi, Jorma; Bhatnagar, Amit

doi:10.1016/j.cej.2015.11.097

Cited by 74 publications

(25 citation statements)

References 66 publications

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“…The fluoride adsorption by Al 2 O 3 nanoparticles in this study is fairly faster than by other adsorbents [35,43,44].…”

Section: Effect Of Contact Time On Fluoride Adsorption By Al 2 O 3 Namentioning

confidence: 47%

“…Thermodynamic parameters were used in order to investigate the thermodynamic feasibility and to confirm the nature of the adsorption process. The thermodynamic parameters were obtained employing the following equations [34,35].…”

Section: Thermodynamic Studiesmentioning

confidence: 99%

“…In this study, coefficient of determination (R 2 ) and residual root mean square error (RMSE) were used to evaluate the fit goodness of applied models. These parameters were used by other research also for the selection of best model [23,35,36]. Two parameters are represented below:…”

Section: Error Analysismentioning

confidence: 99%

See 2 more Smart Citations

Optimization of fluoride removal from aqueous solution by Al 2 O 3 nanoparticles

Hafshejani

Tangsir

Daneshvar

et al. 2017

Journal of Molecular Liquids

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“…The fluoride adsorption by Al 2 O 3 nanoparticles in this study is fairly faster than by other adsorbents [35,43,44].…”

Section: Effect Of Contact Time On Fluoride Adsorption By Al 2 O 3 Namentioning

confidence: 47%

Section: Thermodynamic Studiesmentioning

confidence: 99%

See 1 more Smart Citation

Optimization of fluoride removal from aqueous solution by Al 2 O 3 nanoparticles

Hafshejani

Tangsir

Daneshvar

et al. 2017

Journal of Molecular Liquids

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“…The point of zero charge (pH pzc ) of the MPP was determined using the approach proposed by Tangsir and co‐workers, and is shown in Figure S4, Supporting Information. The positive charge on the surface of MPP was equal to the negative charge when the solution pH had reached the pH pzc of MPP.…”

Section: Resultsmentioning

confidence: 99%

Impact of Ca²⁺ and Mg²⁺ on the Removal of F⁻ by Magnesium Potassium Phosphate

Deng

Wang

2019

CLEAN Soil Air Water

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This study investigates the influence of Ca2+ and Mg2+ on the removal of F− by magnesium potassium phosphate (MPP) from water. The kinetic experiments reveal that the F− concentration decreased from 3.5 to 3.31 mg L−1 in a single (F−) system and to 1.45 mg L−1 in a ternary system (F−, Ca2+, and Mg2+) after 1 min, respectively. Thus, the F− removal efficiencies are found to increase by about 53% with the co‐active effect of Ca2+ and Mg2+ in the solution. Moreover, Ca2+ and Mg2+ are almost completely removed in the F−, Ca2+, and Mg2+ system. According to the pseudo‐first‐order modeling, the rate constants k for F−, Ca2+, and Mg2+ are 0.00348, 0.0106, and 0.0159 min−1 respectively; thus, Mg2+ > Ca2+ > F−. In the ternary system, the removal efficiencies are 53.29–66.03% for F−, 99.99–100% for Ca2+, and 87.21–95.19% for Mg2+ with initial pH 5–10. The removal efficiencies of F− increases with increases in initial concentrations of F−, Ca2+, and Mg2+. The removal of F− is governed by two routes: 1) adsorption by electrostatic interactions and outer sphere surface complexation; 2) co‐precipitation with Ca3(PO4)2, CaHPO4, Mg3(PO4)2, and Mg(OH)2.

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“…The pH at zero charge (pH pzc ) of the prepared catalysts was measured by the drift method as described [42]. In addition, the concentration of surface hydroxyl groups is described in the following; briefly, 0.3 g of catalyst powder was added to 50 mL of NaOH solutions in the concentration range 2-100 mM followed by shaking at 25 • C for >4 h. The solution was passed through a membrane with a 0.22-µm pore size, and the NaOH remaining in the supernatant was determined by titrating with a standard HNO 3 solution.…”

Section: Catalyst Characterizationmentioning

confidence: 99%

The Selectivity of Different Sized Catalysts on DOM Fractional Removal during the Catalytic Ozonation of Municipal Sewage

Wang

et al. 2018

Catalysts

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Dissolved organic matter (DOM) is a typical kind of pollutant with a complex composition, and different advanced treatments demonstrate different abilities toward its fractional removal. Hence, it is necessary to analyze the fraction of DOM that remains when using advanced treatments. In this paper, ozonation was used to deal with the biological effluents and comparisons of the catalytic ozonation with different particle sizes of γ-Al2O3 were made. The results of these comparisons indicated that the catalysts were active in improving the removal of DOM and γ-Al2O3 with different particle sizes can selectively remove DOM. The result of fluorescence showed that a decrease in the catalyst particle size contributes to a significant decrease in the fluorescence intensity, except for tryptophan-like substances. Meanwhile, DOM fractions with large molecular weights could be decomposed into small molecules by ozonation, resulting in increased hydrophilicity. However, the use of a catalyst in ozonation increased the removal of hydrophilic components. Additionally, a smaller catalyst particle size increased the removal of hydrophilic components. The results of catalyst analysis implied that the surface hydroxyl groups of catalyst γ-Al2O3 and the diffusion of DOM in the catalyst γ-Al2O3 played important roles in the ozonation catalytic process for the removal of DOM.

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Water defluoridation using Al2O3 nanoparticles synthesized by flame spray pyrolysis (FSP) method

Cited by 74 publications

References 66 publications

Optimization of fluoride removal from aqueous solution by Al 2 O 3 nanoparticles

Optimization of fluoride removal from aqueous solution by Al 2 O 3 nanoparticles

Impact of Ca²⁺ and Mg²⁺ on the Removal of F⁻ by Magnesium Potassium Phosphate

The Selectivity of Different Sized Catalysts on DOM Fractional Removal during the Catalytic Ozonation of Municipal Sewage

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Water defluoridation using Al2O3 nanoparticles synthesized by flame spray pyrolysis (FSP) method

Cited by 74 publications

References 66 publications

Optimization of fluoride removal from aqueous solution by Al 2 O 3 nanoparticles

Optimization of fluoride removal from aqueous solution by Al 2 O 3 nanoparticles

Impact of Ca2+ and Mg2+ on the Removal of F− by Magnesium Potassium Phosphate

The Selectivity of Different Sized Catalysts on DOM Fractional Removal during the Catalytic Ozonation of Municipal Sewage

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Product

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Impact of Ca²⁺ and Mg²⁺ on the Removal of F⁻ by Magnesium Potassium Phosphate