Fluoride removal from water by granular ceramic adsorption

Chen, Nan; Zhang, Zhenya; Sugiura, Norío; Li, Miao; Chen, Rongzhi

doi:10.1016/j.jcis.2010.04.048

Cited by 130 publications

(60 citation statements)

References 32 publications

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“…Langmuir constants Freundlich constants Alumina cement granules 10.214 (from synthetic water) 0.935 (from natural ground water) [53] Granular ceramic 12.12 [54] Hydrotalcite/chitosan composite 1.255 [55] TNFC (Virgin) 4.14 Present study TNFC (Treated) 6.11 Present study…”

Section: Biosorbentmentioning

confidence: 90%

Defluoridation of Water Using Tamarind (Tamarindus Indica) Fruit Cover: Kinetics and Equilibrium Studies

Kumar

Krishnaiah

2012

J. Chil. Chem. Soc.

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In the present study defluoridation of water was conducted using Tamarind fruit cover (TNFC) as a natural adsorbent in virgin and acid treated forms. Defluoridation of water was studied under batch equilibrium and column flow experimental conditions. The adsorbents were characterized by FTIR, SEM, Pycnomatic ATC techniques. The effect of experimental variables such as initial concentration of fluoride, effect of pH, contact time, co-ions and amount of adsorbent dosage was evaluated. The study was also extended to real field water samples. The equilibrium data were used to study the kinetics of defluoridation process and also to predict the isotherms applicable to the adsorption process. The maximum monolayer adsorption capacity of virgin TNFC and treated TNFC sorbents as obtained from the Langmuir adsorption isotherm was found to be 4.14 mg/g and 6.11 mg/g of fluoride. The column flow adsorption data were utilized to obtain break through curves.

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Section: Biosorbentmentioning

confidence: 90%

Defluoridation of Water Using Tamarind (Tamarindus Indica) Fruit Cover: Kinetics and Equilibrium Studies

Kumar

Krishnaiah

2012

J. Chil. Chem. Soc.

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“…Activated alumina sorbed less fluoride in high pH (>8) conditions [27]. 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].…”

Section: Introductionmentioning

confidence: 95%

“…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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“…It was detected that all of the foreign ions affected a little with the fluoride ion adsorption onto the MgO 2 /Ppy nanocomposite, but bicarbonate and sulphate caused substantial result on the defluoridation capacity of the MgO 2 /Ppy nanocomposite. The weakening in the defluoridation capacity of the MgO 2 /Ppy nanocomposite in the presence of sulphate and bicarbonate ions is primarily due to the increase in the solution pH which decreases the active sites on the adsorbent surface for fluoride adsorption of the composite [23]. The defluoridation capacity of the various competitive ions shows in Fig.…”

Section: Effect Of Foreign-ionsmentioning

confidence: 96%

Magnesium oxide entrapped Polypyrrole hybrid nanocomposite as an efficient selective scavenger for fluoride ion in drinking water

2018

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Aim of this work is to synthesizing a new highly efficient adsorbent as of magnesium oxide (MgO 2 ) entrapped Polypyrrole (Ppy) nanocomposite preparation for toxic pollutant of fluoride removal form drinking water. The synthesized MgO 2 /Ppy hybrid nanocomposite shows an extraordinary defluoridation capacity of 4328 mg F − Kg −1 in the room temperature through batch adsorption technique. It was performed to know the effect of various parameters such as contact time, initial concentration, pH, competitor ions and temperature. The structural and morphological changes on the fluoride adsorbent in before and after were analyzed by using XRD, FTIR & SEM techniques. The adsorption isotherm of Freundlich, Langmuir, & Dubnin -Radushkevich isotherms were studied and the fluoride adsorption is well fixed with Langmuir isotherm model. The kinetic model studies were carried out by both diffusion and reaction based models. The mechanism of fluoride on the MgO 2 /Ppy nanocomposite is mainly influence the interaction of electrostatic adsorption and ion-exchange. The reusability and regeneration studies were performed for the reusability of the nanocomposite.

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Fluoride removal from water by granular ceramic adsorption

Cited by 130 publications

References 32 publications

Defluoridation of Water Using Tamarind (Tamarindus Indica) Fruit Cover: Kinetics and Equilibrium Studies

Defluoridation of Water Using Tamarind (Tamarindus Indica) Fruit Cover: Kinetics and Equilibrium Studies

Defluoridation with Locally Produced Thai Bone Char

Magnesium oxide entrapped Polypyrrole hybrid nanocomposite as an efficient selective scavenger for fluoride ion in drinking water

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