Fluoride removal in water by a hybrid adsorbent lanthanum–carbon

Vences-Álvarez, Esmeralda; Velázquez-Jiménez, Litza Halla; Cházaro-Ruiz, Luis F.; Diaz‐Flores, Paola E.; Rangel-Mendez, J. Rene

doi:10.1016/j.jcis.2015.05.048

Cited by 124 publications

(32 citation statements)

References 41 publications

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“…This observation suggests possible interaction between fluoride and AICFA. A similar observation was reported by Vences-Alvarez et al [35] in their work on fluoride sorption by hybrid adsorbent-lanthanum carbon. Fig.…”

Section: Characterization Of Aicfasupporting

confidence: 88%

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: Characterization Of Aicfasupporting

confidence: 88%

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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“…CO2 capture using porous solids has become an advanced technology used to reduce CO2 emissions (Casco et al, 2014). Activated carbons show a high adsorption capacity (Vences-Alvarez et al, 2015), an easy regeneration, and a high selectivity for CO2 capture with respect to other compounds, such as methane and nitrogen (Casco et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Improvement of Carbon Dioxide Capture using Graphite Waste/ FE3O4 Composites

Kusrini¹,

Sasongko

Nasruddin

et al. 2017

IJTech

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The abundance of graphite waste can be processed into valuable materials; one alternative is by making it into an adsorbent. Graphite-based adsorbent modification can be accomplished by adding magnetite nanoparticles Fe3O4. The addition of magnetite nanoparticles has been reported to improve the adsorption ability of the graphite waste. In this study, we have developed a new carbon dioxide (CO2) adsorbent based on graphite waste modified with magnetite nanoparticle Fe3O4. The Fe3O4 were prepared using an impregnation technique. The graphite/Fe3O4 composites were characterized by scanning electron microscopy with an energydispersive X-ray system (SEM-EDX) and Brunauer, Emmett, and Teller (BET). The CO2 adsorption performance was evaluated using an isothermal adsorption method at various temperatures (30, 35, and 45C) and pressures (3, 5, 8, 15, and 20 bar). This resulted in graphite with different magnetite modification levels, namely non-modified graphite (GNM), a graphite/Fe3O4 20% (w/w) composite (G/Fe3O4 20%), and a graphite/Fe3O4 35% (w/w) (G/Fe3O4 35%), which indicated that the largest adsorption capacity is 10.305 mmol.g -1 at 30C and 20 bar pressure for the G/Fe3O4 20% composite. This finding further revealed that modifying graphite waste with magnetite nanoparticles Fe3O4 has been proved to increase the capacity for adsorbing CO2 gas.

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“…A metal doping procedure was tested using different salts of La 3+ , Al 3+ and Fe 3+ . Note that the surface modification with multivalent metallic species offers several advantages for enhancing the fluoride uptakes in traditional materials such as activated carbons and bone char [23,25,26]. For the metal doping, 1 g of textile-based adsorbent was mixed with 10 mL of the metallic solution with an initial concentration of 200 mg/L.…”

Section: Metal Doping Of Denim-based Adsorbentsmentioning

confidence: 99%

Synthesis of denim waste-based adsorbents and their application in water defluoridation

Mendoza-Castillo

Reynel-Ávila

Bonilla-Petriciolet

et al. 2016

Journal of Molecular Liquids

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This study evaluates the application of denim fiber scraps as a precursor for the synthesis of adsorbents for water treatment via pyrolysis and their application in water defluoridation. The best pyrolysis conditions for the synthesis of this novel adsorbent have been identified and a metal doping route with different salts of Al 3+ , La 3+ and Fe 3+ was proposed to improve its fluoride adsorption behavior. Different spectroscopic and microscopic techniques (i.e., FTIR, XPS, XRF, SEM) were used to characterize the precursor and adsorbents, and to analyze the surface interactions involved in the fluoride removal mechanism. Experimental results showed that these adsorbents were effective for fluoride adsorption showing uptakes up to 4.25 mg/g. The Si-Ometal-F interactions appear to be highly relevant for the fluoride removal. This study highlights the potential of denim textile waste as a raw material for the production of added-value products, thus minimizing their associated disposal cost. It also highlights the performance of denim textile waste as a precursor of adsorbents for addressing relevant environmental concerns such as fluoride pollution.

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Fluoride removal in water by a hybrid adsorbent lanthanum–carbon

Cited by 124 publications

References 41 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

Improvement of Carbon Dioxide Capture using Graphite Waste/ FE3O4 Composites

Synthesis of denim waste-based adsorbents and their application in water defluoridation

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