Excellent fluoride removal properties of porous hollow MgO microspheres

Lian-xiang, LI; Xu, Di; Li, Xiaoqin; Li, Wenchao; Jia, Yong

doi:10.1039/c4nj01361a

Cited by 166 publications

(88 citation statements)

References 56 publications

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“…, and PO 4 3À could interfere in the fluoride adsorption process [46,47]. Present study evaluates the fluoride adsorption behavior in the presence of 100 mg L À1 salt solutions of nitrate, chloride, sulfate and phosphate independently, at the initial fluoride concentration of 1.0 mg L À1 .…”

Section: àmentioning

confidence: 98%

Removal of fluoride by aluminum impregnated coconut fiber from synthetic fluoride solution and natural water

Mondal

Bhaumik

Datta

2015

Alexandria Engineering Journal

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Aluminum impregnated coconut fiber ash (AICFA) was used for removal of fluoride from synthetic fluoride solution. The AICFA showed high specific area and strong affinity toward fluoride. Synthesized AICFA was characterized by pH ZPC , FTIR, SEM and XRD studies. Adsorption kinetics indicated that the adsorption equilibrium was reached within 60 min and the adsorption process followed the pseudo-second-order kinetic model better. The Langmuir isotherm model could fit the experimental data well. Thermodynamic parameters such as Gibbs free energy (DG ), enthalpy (DH ) and entropy (DS ) change of sorption were also evaluated which indicated that the adsorption process was spontaneous, feasible and exothermic in nature. Furthermore, the coexisting anions had significant effect on fluoride adsorption. Moreover, desorption study with AICFA showed that nearly 98% of fluoride could be leached out at pH 12. Further, the reusable properties of the material supported the possibility of its use commercially. Ó 2015 Faculty of Engineering, Alexandria University. Production and hosting by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

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Section: àmentioning

confidence: 98%

Removal of fluoride by aluminum impregnated coconut fiber from synthetic fluoride solution and natural water

Mondal

Bhaumik

Datta

2015

Alexandria Engineering Journal

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“…K d is the equilibrium constant, related to the Langmuir constant b. 10,31 To assess the inuence of pH values on uoride removal, experiments were conducted at various pH values ranging from 3 to 11, and the results are shown in Fig. The thermodynamic data are shown in Fig.…”

Section: Fluoride Removal Propertiesmentioning

confidence: 99%

A facile precipitation synthesis of mesoporous 2-line ferrihydrite with good fluoride removal properties

et al. 2015

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Mesoporous 2-line ferrihydrite was synthesized through a facile precipitation method and was characterized by X-ray diffraction, transmission electron microscopy, and nitrogen adsorptiondesorption isotherms. The surface area of the obtained mesoporous 2-line ferrihydrite was 331.0 m 2 g À1 . The fluoride adsorption performance was investigated. Batch adsorption experiments were conducted to study the influence of various factors such as contact time, initial fluoride concentration, temperature, pH value and co-existing anions on the adsorption of fluoride. The fluoride adsorption process fitted well with the Langmuir model, and the maximum adsorption capacity was 23.89 mg g À1 at pH 7.0. It is worth mentioning that this adsorbent performed well over a considerably wide pH range of 3-9. The fluoride adsorption kinetics over the adsorbent can be well described by a pseudo-second-order kinetic model. Thermodynamic parameters including the Gibbs free energy, standard enthalpy and standard entropy were calculated, and the results suggested that the adsorption of fluoride on the mesoporous 2line ferrihydrite was thermodynamically favorable and exothermic in nature. Furthermore, Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy analyses revealed that the surface hydroxyl groups play an important part in the fluoride removal process.

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“…In short, micro/nanosized MgO can efficiently remove heavy metal ions [18][19][20], fluoride [21], toxic dyes [22,23], etc. The pioneering work inspires us to further explore the adsorption capacities of MgO nanoparticles for heavy metal ions in solutions.…”

Section: Introductionmentioning

confidence: 99%

Investigation on the efficiency and mechanism of Cd(II) and Pb(II) removal from aqueous solutions using MgO nanoparticles

Xiong

Wang

Tan

et al. 2015

Journal of Hazardous Materials

224

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Excellent fluoride removal properties of porous hollow MgO microspheres

Cited by 166 publications

References 56 publications

Removal of fluoride by aluminum impregnated coconut fiber from synthetic fluoride solution and natural water

Removal of fluoride by aluminum impregnated coconut fiber from synthetic fluoride solution and natural water

A facile precipitation synthesis of mesoporous 2-line ferrihydrite with good fluoride removal properties

Investigation on the efficiency and mechanism of Cd(II) and Pb(II) removal from aqueous solutions using MgO nanoparticles

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