Recyclable Mg–Al layered double hydroxides for fluoride removal: Kinetic and equilibrium studies

Kameda, Tomohito; Oba, Jumpei; Yoshioka, Toshiaki

doi:10.1016/j.jhazmat.2015.07.023

Cited by 69 publications

(21 citation statements)

References 22 publications

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“…Industrial recycling of fluoride is globally very limited, with fluoride-bearing waste streams generally viewed as nuisances to dispose of, rather than recycling opportunities [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Towards the implementation of an ion-exchange system for recovery of fluoride commodity chemicals. Kinetic and dynamic studies

Robshaw

Dawson

Bonser

2019

Chemical Engineering Journal

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“…Industrial recycling of fluoride is globally very limited, with fluoride-bearing waste streams generally viewed as nuisances to dispose of, rather than recycling opportunities [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Towards the implementation of an ion-exchange system for recovery of fluoride commodity chemicals. Kinetic and dynamic studies

Robshaw

Dawson

Bonser

2019

Chemical Engineering Journal

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“…The problem with high fluoride in drinking water is a major problem in several tropical countries like India [9]. The only possible remedy of this problem is defluoridation [10].…”

Section: Introductionmentioning

confidence: 99%

Natural Banana (Musa acuminate) Peel: an Unconventional Adsorbent for Removal of Fluoride from Aqueous Solution through Batch Study

Mondal

2016

Water Conserv Sci Eng

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Higher level of fluoride in underground water is a burning problem in many parts of the world. Continuous ingestion of fluoride containing water leads to fluorosis. In the present work, natural banana (Musa acuminate) peel (NBP), an unconventional adsorbent, has been explored for removal of fluoride from aqueous system. The NBP was characterized by using SEM, FTIR, and point of zero charge. In the batch study, maximum fluoride removal was achieved at the pH 4.0 (pH ZPC 5.63), taking about 60 min to attain equilibrium. Kinetics data were fitted with a pseudo-second-order (R 2 = 0.99) and Bahangam models (R 2 = 1.00). The experimental data fitted well to a D-R adsorption isotherm (R 2 = 0.995). Thermodynamic data suggests that the adsorption of fluoride on NBP is an exothermic reaction. Therefore, the results suggest that natural banana peel dust could be a cost-effective, eco-friendly adsorbent for removal of fluoride from aqueous medium.

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“…Unilameller LEuH-flocs nanosheets had the highest fluoride loading capacity of 40 mmol/g as compared to ∼20.0 mmol/g exhibited by LEuH-Cl aggregates ( Figure 10). Note that LDH-Cl (Mg/Al with a molar ratio of 0.67 : 0.33, respectively) materials exhibit adsorption Journal of Chemistry capacities of 3.3 mmol/g [22]. Hence, the newly synthesized unilameller LEuH-flocs provide an effective and fast chemisorption recyclable nanosorbent material reported so far for fluoride separation from water.…”

Section: Application Of the Unilameller Leuh-flocs Nanosheets Inmentioning

confidence: 92%

Layered Rare-Earth Hydroxide Unilameller Nanosheets: Synthesis, Characterization, and Adsorption

Omwoma

Odongo

Otieno

et al. 2020

Journal of Chemistry

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Unilameller nanosheets with a lateral dimension of one nanometer have been isolated from a colloidal solution of europium-containing layered rare-earth hydroxide (LRH) material by the flocculation method. The nanosheets were achieved by changing pH of the colloidal solution from 6.7 to 11.5. The resultant flocculated nanosheets show high efficiency in sorption of fluoride anions from aqueous media (40 mmol/g), providing a potentially useful sorbent material for water purification technology. The sorbent material is demonstrated to be reusable for at least ten times without a significant loss of adsorption efficiency. And the results fit the Langmuir adsorption curve, indicating the chemisorption nature of the nanosheets. Most importantly, the isolated nanosheets are expected to widen the applicability and flexibility in material synthesis using two-dimensional nanomaterials.

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Recyclable Mg–Al layered double hydroxides for fluoride removal: Kinetic and equilibrium studies

Cited by 69 publications

References 22 publications

Towards the implementation of an ion-exchange system for recovery of fluoride commodity chemicals. Kinetic and dynamic studies

Towards the implementation of an ion-exchange system for recovery of fluoride commodity chemicals. Kinetic and dynamic studies

Natural Banana (Musa acuminate) Peel: an Unconventional Adsorbent for Removal of Fluoride from Aqueous Solution through Batch Study

Layered Rare-Earth Hydroxide Unilameller Nanosheets: Synthesis, Characterization, and Adsorption

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