The influence of organic matter on fluoride removal efficiency during the electrodialysis process

Grzegorzek, Martyna; Majewska-Nowak, Katarzyna

doi:10.5004/dwt.2017.20327

Cited by 9 publications

(3 citation statements)

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“…Worldwide, abundant and various methods for fluoride removal from water are applied. The key methods for fluoride removal from drinking water include: coagulation and precipitation methods [23], electro-coagulation [24], reverse osmosis and nanofiltration [7,25], dialysis and electro-dialysis [26], freeze concentration [27], ion-exchange method [28] and adsorption technique [7,23]. A wide variety of adsorbents are usable for fluoride removal, including alumina and aluminum based adsorbents (alumina plus manganese dioxide, alumina plus manganese oxide, alumina plus calcium minerals, bauxite, red mud, lateritic ores, lanthanum and cerium modified mesoporous alumina, fungus hyphaesupported alumina [7,[29][30][31][32][33], clays and soils (clay, fired clays, coated clays, related low-cost materials, soils) [7,34], calcium, carbon (graphite, alumina-impregnated graphitic carbon, carbon nanotubes, alumina-impregnated carbon nanotubes, nano-magnetically modified activated carbon prepared by oak shell) [1,7], zeolites [35], synthetic resins, layered double hydroxides (LDHs) [7], hybrid adsorbent lanthanum-carbon [36], lanthanum-loaded magnetic cationic hydrogel composite [4] and 3D rice-like lanthanum-doped La@MgAl nanocomposites [37].…”

Section: Introductionmentioning

confidence: 99%

Removal of Fluorides from Aqueous Solutions Using Exhausted Coffee Grounds and Iron Sludge

Siaurusevičiūtė

Albrektienė

2021

Water

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Many countries are confronted with a striking problem of morbidity of fluorosis that appears because of an increased concentration of fluorides in drinking water. The objective of this study is to explore opportunities for removal of fluoride from aqueous solutions using cheap and easily accessible adsorbents, such as exhaustive coffee grounds and iron sludge and to establish the efficiency of fluoride removal. Twelve doses (1, 2, 3, 4, 5, 6, 10, 20, 30, 40, 50 and 60 g/L) of adsorbents were used and five durations of the sorption process (30, 60, 90, 120 and 150 min). The results showed that the most optimum dose of iron sludge for 3 mg/L of fluoride removal was 30 g/L and the contact time was 30 min, the efficiency of fluoride removal achieved 62.92%; the most optimum dose of exhausted coffee grounds was 60 g/L with the most optimum contact time of 60 min; at a dose of 50 g/L with contact time of 90 min, the efficiency of fluoride removal achieved 56.67%. Findings demonstrate that adsorbents have potential applicability in fluoride removal up to the permissible norms.

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Section: Introductionmentioning

confidence: 99%

Removal of Fluorides from Aqueous Solutions Using Exhausted Coffee Grounds and Iron Sludge

Siaurusevičiūtė

Albrektienė

2021

Water

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“…The world health organization (WHO) has set the guideline on fluoride in drinking water at 1.5 mg/L [7]. Plenty of methods have been attempted to lower high levels of fluoride, including electrodialysis [8], adsorption [9][10][11][12], precipitation [13], ion exchange [14] and membrane filtration [15]. Among them, adsorption is found to be a more appropriate method to remove the fluoride in drinking water due to the fact that it is relatively simple in design and convenient to operate.…”

Section: Introductionmentioning

confidence: 99%

Uptake Fluoride from Water by Starch Stabilized Layered Double Hydroxides

Liu

Yue

et al. 2018

Water

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A novel starch stabilized Mg/Al layered Double hydroxides (S-LDHs) was prepared in a facile approach and its fluoride ion removal performance was developed. Characterization of S-LDHs was employed by using X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), and particle size distribution. The adsorption property was studied through the assessment of the adsorption isotherms, kinetic models, thermal dynamics, and pH influence. The result shows that a low loading of starch of 10 mg onto layered double hydroxides (LDHs) could obviously improve the fluoride removal rate. The S-LDHs had three times higher the adsorption capacity to fluoride than that of Mg/Al LDHs to fluoride. The particle size was smaller and the particle size distribution was narrower for S-LDHs than that for Mg/Al LDHs. The Langmuir adsorption isotherm model and pseudo-second-order kinetic model fitted well with the experimental data. In thermodynamic parameters, the enthalpy (∆H 0) value was 35.63 kJ•mol −1 and the entropy (∆S 0) value was 0.0806 kJ•mol −1 K −1. The values of ∆G 0 were negative, implying the adsorption process is spontaneous. S-LDHs reveals stable adsorption property in a wide pH range from 3 to 9. The mechanism for fluoride adsorption on S-LDHs included surface adsorption and interaction ion exchange.

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“…The world health organization ( WHO ) has set the guideline on fluoride in drinking water at 1.5 mg/L [7]. Plenty of methods have been attempted to low down high level fluoride, including electrodialysis [8],adsorption [9][10][11][12], precipitation [13], ion exchange [14] and membrane filteration [15]. Among them, adsorption is found to be more appropriate method to remove fluoride in drinking water due to the fact that it is relatively simple in design and convenient to operate.…”

Section: Introductionmentioning

confidence: 99%

Uptake Fluoride from Water by Starch Stabilized Layered Double Hydroxide

Liu¹,

Yue²,

Lu³

et al. 2018

Preprint

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A novel starch stabilized Mg/Al LDHs material (S-LDH) was prepared in a facile approach and its fluoride ion removal performance was developed. Characterization of S-LDH was employed by using XRD, FTIR and particle size distribution. The adsorption property was studied through the assessment of adsorption isotherms, kinetic models, thermal dynamics and pH influence. The result shows that a low loading of starch of 10 mg onto LDH could obviously improve fluoride removal rate. The S-LDH had 3 times higher adsorption capacity to fluoride than that of Mg/Al LDH to fluoride. The particle size was smaller and the particle size distribution was narrower for S-LDH than that for Mg/Al LDH. Langmuir adsorption isotherm model and pseudo-second-order kinetic model fitted well with the experimental data. In thermodynamic parameters, the enthalpy (△H 0 ) value was 35.63 kJ mol -1 and the entropy (△S 0 ) value was 0.0806 kJ mol -1 K -1 . The values of △G 0 were negative, implying the adsorption process is spontaneous. S-LDH reveals stable adsorption property in a wide pH range from 3 to 9. The mechanism for fluoride adsorption on S-LDH included surface adsorption and interaction ion exchange.

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The influence of organic matter on fluoride removal efficiency during the electrodialysis process

Cited by 9 publications

References 0 publications

Removal of Fluorides from Aqueous Solutions Using Exhausted Coffee Grounds and Iron Sludge

Removal of Fluorides from Aqueous Solutions Using Exhausted Coffee Grounds and Iron Sludge

Uptake Fluoride from Water by Starch Stabilized Layered Double Hydroxides

Uptake Fluoride from Water by Starch Stabilized Layered Double Hydroxide

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