A Review on Adsorption of Fluoride from Aqueous Solution

Habuda-Stanić, Mirna; Ravančić, Maja Ergović; Flanagan, Andrew

doi:10.3390/ma7096317

Cited by 254 publications

(119 citation statements)

References 201 publications

Supporting

Mentioning

101

Contrasting

Unclassified

Order By: Relevance

“…This might be due to the increased chloride concentration on prepared adsorbent at higher impregnation ratio, which might have repelled the incoming fluoride ion onto the surface of the adsorbent. Similar observations were made by Habuda-Stanić et al (2014). However, at 550°C, the negative effect of high impregnation ratio was found to be negligible small.…”

Section: Resultssupporting

confidence: 76%

“…Nalgonda technique of fluoride removal is based on precipitation-coagulation. The following technique can remove only 18-33% fluoride and the greater part of the fluoride is converted to aluminium fluoride complexes, which is a toxic compound (Habuda-Stanić et al 2014). In contrast to these, adsorption process is economically effective and ultimate fate of many contaminants in aquatic environment (Bhatnagar et al 2011).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Application of response surface methodology for optimization of biosorption of fluoride from groundwater using Shorea robusta flower petal

et al. 2017

View full text Add to dashboard Cite

Fluoride pollution in groundwater is a major concern in rural areas. The flower petal of Shorea robusta, commonly known as sal tree, is used in the present study both in its native form and Ca-impregnated activated form to eradicate excess fluoride from simulated wastewater. Response surface methodology (RSM) was used for experimental designing and analyzing optimum condition for carbonization vis-à-vis calcium impregnation for preparation of adsorbent. During carbonization, temperature, time and weight ratio of calcium chloride to sal flower petal (SFP) have been considered as input factors and percentage removal of fluoride as response. Optimum condition for carbonization has been obtained as temperature, 500°C; time, 1 h and weight ratio, 2.5 and the sample prepared has been termed as calcium-impregnated carbonized sal flower petal (CCSFP). Optimum condition as analyzed by one-factor-at-a-time (OFAT) method is initial fluoride concentration, 2.91 mg/L; pH 3 and adsorbent dose, 4 g/L. CCSFP shows maximum removal of 98.5% at this condition. RSM has also been used for finding out optimum condition for defluoridation considering initial concentration, pH and adsorbent dose as input parameters.The optimum condition as analyzed by RSM is: initial concentration, 5 mg/L; pH 3.5 and adsorbent dose, 2 g/L. Kinetic and equilibrium data follow Ho pseudo-secondorder kinetic model and Freundlich isotherm model, respectively. Adsorption capacity of CCSFP has been found to be 5.465 mg/g. At optimized condition, CCSFP has been found to remove fluoride (80.4%) efficiently from groundwater collected from Bankura district in West Bengal, a fluoride-contaminated province in India. Adsorption rate constant of pseudo-second-order adsorption rate equation (g mgMaximum adsorption capacity of the adsorbent (mg/ g) q eSolid phase concentration of fluoride at equilibrium (mg/g) q tSolid phase concentration of fluoride at any time t (mg/g) DS Change in entropy (kJ/mol K) t Contact time (h)Electronic supplementary material The online version of this article

show abstract

Section: Resultssupporting

confidence: 76%

Section: Introductionmentioning

confidence: 99%

Application of response surface methodology for optimization of biosorption of fluoride from groundwater using Shorea robusta flower petal

et al. 2017

View full text Add to dashboard Cite

show abstract

“…A central rationale for the applicability of Fe 0 materials for water treatment is due to their ability to produce solid iron (hydr)oxide corrosion products which are highly effective aqueous contaminant-scavenging agents [102][103][104] for negatively charged substances [46,96,105,106], such as F´ [40].…”

Section: The State-of-the Artmentioning

confidence: 99%

Technologies for Decentralized Fluoride Removal: Testing Metallic Iron-based Filters

Ndé-Tchoupé

Crane

Mwakabona

et al. 2015

Water

View full text Add to dashboard Cite

Since the realization in the 1930s that elevated fluoride concentrations in drinking water can have detrimental effects on human health, new methods have been progressively developed in order to reduce fluoride to acceptable levels. In the developing world the necessity for filtration media that are both low-cost and sourced from locally available materials has resulted in the widespread use of bone char. Since the early 1990s metallic iron (Fe 0 ) has received widespread use as both an adsorbent and a reducing agent for the removal of a wide range of contaminant species from water. The ion-selectivity of Fe 0 is dictated by the positively charged surface of iron (hydr)oxides at circumneutral pH. This suggests that Fe 0 could potentially be applied as suitable filter media for the negatively charged fluoride ion. This communication seeks to demonstrate from a theoretical basis and using empirical data from the literature the suitability of Fe 0 filters for fluoride removal. The work concludes that Fe 0 -bearing materials, such as steel wool, hold good promise as low-cost, readily available and highly effective decentralized fluoride treatment materials.

show abstract

“…Fluoride (F − ) is an anion of fluorine characterized by small radius having extraordinary tendency to act as a ligand and readiness to form numerous organic and inorganic compounds in soil, rocks, air, plants and animals 1 . The element fluorine is present in phosphatic fertilizers, soils and plants.…”

Section: Introductionmentioning

confidence: 99%

Influence of Incubation Periods on Extractable Fluoride and Phosphorous at Different Exchangeable Sodium Percentage Levels

Barnwal

Sharma

Bhat

et al. 2017

Curr. World Environ

View full text Add to dashboard Cite

The laboratory incubation experiment was accomplished to study the effect of incubation periods on the extractable Fluoride (F) and Phosphorous (P) in soil at different exchangeable sodium percentage (ESP) levels. The soils of different ESP levels (30, 45 and 60) were prepared by applying different amount of sodium bicarbonate dissolved in distilled water to the calculated volume of saturation percentage of the soil. The observed ESP of the prepared soil was 27.1, 43.7 and 54.9. Incubation studies were conducted with fluoride levels ranging from 40 to 160 mg/kg and phosphorus levels from 12.5 to 50 mg/ kg with incubation periods of 1, 3, 7, 14, 21, 28 and 35 days at temperature of 25±2 0 C. Moisture was maintained at field capacity by addition of distilled water. The results showed that the extractability of fluoride in soil increased with increasing levels of F and P application along with increased ESP. The increase was 100 percent at ESP 54.9 compared to ESP 6.2 at F level of 160 mg/ kg at 1st day of incubation period. Similarly, Olsen's extractable phosphorus in soil increased with increasing levels of F, P and ESP. It increased by 66 percent at ESP 54.9 compared to ESP 6.2 at P level of 50 mg/kg at 1 st day of incubation period. However, extractability of both F and P decreased with increase in incubation periods. Fluoride extractability decreased by 65 percent at ESP 6.2 and 25 percent at ESP 54.9 with increasing days from 1 st to 35 th day of incubation period. Olsen's extractable phosphorus decreased by 37 percent at ESP 6.2 and 48 percent at ESP with increasing days from 1 st to 35 th day of incubation period.

show abstract

A Review on Adsorption of Fluoride from Aqueous Solution

Cited by 254 publications

References 201 publications

Application of response surface methodology for optimization of biosorption of fluoride from groundwater using Shorea robusta flower petal

Application of response surface methodology for optimization of biosorption of fluoride from groundwater using Shorea robusta flower petal

Technologies for Decentralized Fluoride Removal: Testing Metallic Iron-based Filters

Influence of Incubation Periods on Extractable Fluoride and Phosphorous at Different Exchangeable Sodium Percentage Levels

Contact Info

Product

Resources

About