Modified natural magnetite with Al and La ions for the adsorption of fluoride ions from aqueous solutions

García-Sánchez, J.J.; Solache‐Ríos, M.; Martínez-Gutiérrez, José; Arteaga-Larios, N.V.; Ojeda-Escamilla, M.C.; Rodríguez, Israel

doi:10.1016/j.jfluchem.2016.05.004

Cited by 39 publications

(8 citation statements)

References 28 publications

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“…The effectiveness of modified material was also reported by [137] on magnetite modified with aluminum and lanthanum ions for the adsorption of fluoride. The adsorption of fluoride was reported to increase by 60% and 66% for the aluminum and lanthanum modified materials, respectively [137].…”

Section: Fluoride (F − ) Adsorption Isotherm and Adsorption Capacitymentioning

confidence: 61%

“…Another comparison was made between alkoxide origin alumina and activated alumina on fluoride removal, and higher fluoride uptake was seen with alkoxide alumina because of Fe 2 O 3 and SiO 2 , activated carbon pores, and the increased electropositivity of the material [4]. The effectiveness of modified material was also reported by [137] on magnetite modified with aluminum and lanthanum ions for the adsorption of fluoride. The adsorption of fluoride was reported to increase by 60% and 66% for the aluminum and lanthanum modified materials, respectively [137].…”

Section: Fluoride (F − ) Adsorption Isotherm and Adsorption Capacitymentioning

confidence: 97%

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A Comparative Study on Removal of Hazardous Anions from Water by Adsorption: A Review

John

David

Mmereki

2018

International Journal of Chemical Engineering

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This paper presents a comparative review of arsenite (As(III)), arsenate (As(V)), and fluoride (F − ) for a better understanding of the conditions and factors during their adsorption with focus on (i) the isotherm adsorption models, (ii) effects of pH, (iii) effects of ionic strength, and (iv) effects of coexisting substances such as anions, cations, and natural organics matter. It provides an indepth analysis of various methods of arsenite (As(III)), arsenate (As(V)), and fluoride (F − ) removal by adsorption and the anions' characteristics during the adsorption process. The surface area of the adsorbents does not contribute to the adsorption capacity of these anions but rather a combination of other physical and chemical properties. The adsorption capacity for the anions depends on the combination of all the factors: pH, ionic strength, coexisting substances, pore volume and particles size, surface modification, pretreatment of the adsorbents, and so forth. Extreme higher adsorption capacity can be obtained by the modification of the adsorbents. In general, pH has a greater influence on adsorption capacity at large, since it affects the ionic strength, coexisting anions such as bicarbonate, sulfate, and silica, the surface charges of the adsorbents, and the ionic species which can be present in the solution.

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Section: Fluoride (F − ) Adsorption Isotherm and Adsorption Capacitymentioning

confidence: 61%

Section: Fluoride (F − ) Adsorption Isotherm and Adsorption Capacitymentioning

confidence: 97%

A Comparative Study on Removal of Hazardous Anions from Water by Adsorption: A Review

John

David

Mmereki

2018

International Journal of Chemical Engineering

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“…Different adsorbents exhibit different defluoridation performances, which depend on the physicochemical properties of adsorbents. During the past decades, a variety of adsorbents have been developed and used for fluoride removal, such as natural-mineral-based adsorbents, , biomass adsorbents, carbon-based adsorbents, − metal oxides, or hydroxides. − For example, stilbite zeolite with low cost was used as the raw material to prepare a nano-hydroxyapatite/stilbite adsorbent, which had an adsorption capacity of 4.02 mg/g . Affonso et al synthesized an adsorbent by stabilizing carbon nanotubes in chitosan sponge and evaluated its feasibility for fluoride removal from fertilizer industry wastewater .…”

Section: Introductionmentioning

confidence: 99%

Separation of Excess Fluoride from Water Using Amorphous and Crystalline AlOOH Adsorbents

et al. 2021

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Aluminum hydroxide is an effective defluoridation adsorbent; however, the poor defluoridation performance limits its wide application. In this work, amorphous and crystalline AlOOH adsorbents are synthesized through hydrolysis of Al salts, and their defluoridation performances are evaluated in terms of adsorption capacity and rate, sensitivity to pH value, and water quality after defluoridation. The defluoridation performance of AlOOH is closely related to the hydrolysis pH value, but hardly to the type of Al salts. The adsorbent can remove >95% fluoride in the first 2 min and reach adsorption equilibrium within 2 h, and the maximum defluoridation capacity is 41.9 mg/g. Furthermore, the adsorbent exhibits an excellent defluoridation efficiency at a wide pH range of 4.5–10.5. After fluoride removal, the adsorbents prepared at pH values of 6 and 7 exhibit low residual Al concentration. The Fourier transform infrared (FTIR) and X-ray photoelectron spectroscopy (XPS) results confirm that the fluoride removal mechanism is the ligand exchange between fluoride and hydroxyl groups. The excellent defluoridation capacity and low residual Al demonstrate that AlOOH is a potential adsorbent for fluoride separation from water.

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“…According to García-Sánchez et al (2016), modified natural magnetite ore (Fe 3 O 4 ) with aluminum and lanthanum ions increases the fluoride removal efficiency from aqueous solutions. Batch tests showed the adsorption efficiency of 90% and 96% for the aluminum and lanthanum modified materials, respectively.…”

Section: Modified Natural Magnetite Ore (Fe 3 O 4 ) With Aluminum And...mentioning

confidence: 99%

A review on adsorption efficiency of widely adopted adsorbents used in Defluoridation of aqueous media

Das¹

2022

EEC

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The review article provides an insight on various adsorbents and their efficiency in fluorideremoval fromdrinking and waste water. The capacity of fluoride removal of adsorbent is dependent on pH, contact time,temperature, surface area of adsorbent and initial concentration of fluoride solution etc. In comparison tothe traditional natural methods, the synthetic and nanostructure-based adsorbents, exhibited higherperformance and efficiency of defluorination which provides a sustainable approach to safe drinking waterquality. The present paper deals with some widely adopted natural adsorbent, synthetic and nanostructurebasedadsorbents. The natural adsorbent includes, thermally treated lateritic soil, modified natural magnetiteore (Fe3O4) with aluminum and lanthanum ions, lateritic soils, Titanium hydroxide, limestone (LS) andaluminium hydroxide, sedimentation with calcium and aluminium. The Synthetic adsorbent includes,Surface-functionalized polyurethane foam (SPUF); Schwertmannite; Carbonaceous material from pyrolysisof sewage sludge; Chitosan. And the effective adsorbent nano scale structure includes, nanoscale aluminiumoxide hydroxide (AlOOH), Magnetic iron oxide/aluminium hydroxide composite, sulfatedoped Fe3O4/Al2O3 nanoparticles, nano-scale aluminum oxide hydroxide (nano-AlOOH), Graphene Nanoparticlesadsorbent, Al2O3/Bio-TiO2 nano composite (ABN), Green synthesized Fe3O4/Al2O3nanoparticles with coatedpolyurethane foams etc. The activated alumina is most conventional fluoride adsorbing material. However,activated alumina performs well in acidic environment with complex regeneration issue. Although othertraditional adsorbents remove fluoride from water but they have lower efficiency, which restrict theirapplication. In case of synthetic and nano structured based adsorbents, due to increased surface area, nontoxicnature, limited solubility in water and high adsorption efficiency, these methods are widely accepted andproven environmentally suitable.

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Modified natural magnetite with Al and La ions for the adsorption of fluoride ions from aqueous solutions

Cited by 39 publications

References 28 publications

A Comparative Study on Removal of Hazardous Anions from Water by Adsorption: A Review

A Comparative Study on Removal of Hazardous Anions from Water by Adsorption: A Review

Separation of Excess Fluoride from Water Using Amorphous and Crystalline AlOOH Adsorbents

A review on adsorption efficiency of widely adopted adsorbents used in Defluoridation of aqueous media

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