Adsorption of fluoride by hydrous iron(III)–tin(IV) bimetal mixed oxide from the aqueous solutions

Biswas, Krishna; Gupta, Kaushik; Ghosh, Uday Chand

doi:10.1016/j.cej.2008.09.047

Cited by 181 publications

(61 citation statements)

References 44 publications

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“…4 depicted the decrease in k 2 values (8.749 to 1.568 g/(mg.min)), and the increase in q e,cal (0.477 to 3.748 mg/g) and V 0 (1.990 to 22.026 mg/(g.min)) values with an increase in the concentration of fluoride. Thus, the rate of adsorption decreased with an increase in the solute concentration, which is similar to the results observed for the removal of fluoride using hydrous iron(III)-tin(IV) bimetal mixed oxide [38]. Fig.…”

Section: Kinetics Modelingsupporting

confidence: 86%

Experimental Evaluation of Activated Termite Mound for Fluoride Adsorption

Fufa¹

2016

IOSR

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Section: Kinetics Modelingsupporting

confidence: 86%

Experimental Evaluation of Activated Termite Mound for Fluoride Adsorption

Fufa¹

2016

IOSR

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“…Fluoride adsorption by granular ceramic [18], activated alumina [27], granular ferric hydroxide [26], and schwertmannite [20] was found to decrease in the presence 2 Advances in Environmental Chemistry of phosphate. Competing ions were found to have no effect on fluoride adsorption by other absorbents such as hydrous iron (III)-tin (IV) mixed oxide [19], polymer composites [28], and disposed earthenware [29]. However, sulfate and phosphate ions were found to compete with fluoride sorption on materials with iron and aluminum bases [13].…”

Section: Introductionmentioning

confidence: 97%

“…Recently, many attempts have been made to use waste or low cost materials as the absorbent. The materials studied include bauxite [13], montmorillonite [14], activated water treatment sludge [15], waste mud [16], red mud [17], granular ceramic [18], hydrous iron (III)-tin (IV) mixed oxide [19], and schwertmannite [20].…”

Section: Introductionmentioning

confidence: 99%

Defluoridation with Locally Produced Thai Bone Char

Mutchimadilok

Smittakorn

Mongkolnchai-arunya

et al. 2014

Advances in Environmental Chemistry

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The fluoride sorption ability of a locally available bone char is quantified. Both a synthetic solution and natural groundwater samples from several sites are studied and compared to Indian bone char, which is widely accepted and used successfully in India and elsewhere. The Freundlich and Langmuir sorption isotherms were used to quantify sorption properties. Results show that the Thai bone char is as effective as the Indian bone char for removing fluoride from contaminated water, despite the more rigid physical and social constraints found in rural Thailand. Sorption studies with fluoride-contaminated natural groundwater samples also show that chlorides, nitrates, and sulfates had little effect on the removal of fluoride by the homemade bone char.

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“…Activated alumina has been the most often used adsorbent for fluoride removal, but the disadvantages including aluminum dissolution, relatively low adsorption capacity, and low optimum pH have prevented them from wide application [4]. Other adsorbents such as bone char, ferric hydroxide, layered double hydroxides, hybrid metal oxides, and natural materials also have been used to remove fluoride from water [5][6][7][8][9]. Although many adsorbents have been developed and used for fluoride removal, it is still required to develop new adsorbents at a reasonable price with a high sorption capacity for fluoride in water treatment.…”

Section: Introductionmentioning

confidence: 99%

“…To increase the sorption capacity of fluoride, some hybrid adsorbents have been prepared. Previous studies have shown that the incorporation of lanthanum (III), zirconium (IV), and tin (IV) oxides into the adsorbents can significantly increase the adsorption capacity for fluoride [8,12,13]. The rare earth doped titanium-based adsorbents for fluoride removal were not reported in the literature, and the incorporation of these metals into the lattice structure of TiO 2 might increase the sorption capacity of fluoride.…”

Section: Introductionmentioning

confidence: 99%

Removal of fluoride from water using titanium-based adsorbents

Deng

Zhang

et al. 2010

Front. Environ. Sci. Eng. China

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Three adsorbents including TiO 2 , Ti-Ce, and Ti-La hybrid oxides were prepared to remove fluoride from aqueous solution. The Ti-Ce and Ti-La hybrid adsorbents obtained by the hydrolysis-precipitation method had much higher sorption capacity for fluoride than the TiO 2 adsorbent prepared through hydrolysis. Rare earth (Ce and La) oxides and TiO 2 exhibited a synergistic effect in the hybrid adsorbents for fluoride sorption. The sorption equilibrium of fluoride on the three adsorbents was achieved within 4 h, and the pseudo-second-order model described the sorption kinetics well. The sorption isotherms fitted the Langmuir model well, and the adsorption capacities of fluoride on the Ti-Ce and Ti-La adsorbents were about 9.6 and 15.1 mg$g -1 , respectively, at the equilibrium fluoride concentration of 1.0 mg$L -1 , much higher than the 1.7 mg$g -1 on the TiO 2 . The sorption capacities of fluoride on the three adsorbents decreased significantly when the solution pH increased from 3 to 9.5. The electrostatic interaction played an important role in fluoride removal by the three adsorbents, and Fourier transform infrared (FTIR) analysis indicated that the hydroxyl groups on the adsorbent surface were involved in fluoride adsorption.

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Adsorption of fluoride by hydrous iron(III)–tin(IV) bimetal mixed oxide from the aqueous solutions

Cited by 181 publications

References 44 publications

Experimental Evaluation of Activated Termite Mound for Fluoride Adsorption

Experimental Evaluation of Activated Termite Mound for Fluoride Adsorption

Defluoridation with Locally Produced Thai Bone Char

Removal of fluoride from water using titanium-based adsorbents

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