Removal of Fluoride Ion by Bone Char Produced from Animal Biomass

Kawasaki, Naohito; Ogata, Fumihiko; Tominaga, Hisato; Yamaguchi, Isao

doi:10.5650/jos.58.529

Cited by 43 publications

(22 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Prior to the batch test, the concentration of phosphate was less than 0.01 mg/L, while the final concentration of phosphate was 0.8 mg/L. The increasing concentration of phosphate associated with the fluoride removal by bone char is similar to two previous works [22,37]. He et al [37] note that tricalcium phosphate is partially broken off in water which can occur in three different possible pH states: acidic, neutral, and alkaline.…”

Section: The Effect Of Multiple Ions On the Sorption Capacitysupporting

confidence: 60%

Defluoridation with Locally Produced Thai Bone Char

Mutchimadilok

Smittakorn

Mongkolnchai-arunya

et al. 2014

Advances in Environmental Chemistry

View full text Add to dashboard Cite

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.

show abstract

Section: The Effect Of Multiple Ions On the Sorption Capacitysupporting

confidence: 60%

Defluoridation with Locally Produced Thai Bone Char

Mutchimadilok

Smittakorn

Mongkolnchai-arunya

et al. 2014

Advances in Environmental Chemistry

View full text Add to dashboard Cite

show abstract

“…There is significant difference for 1% vs. 2% and 2% vs. 4% thus increasing the concentration from 1% to 2% or from 2% to 4%, the concentration of the fluoride removed from bone char increases. The concentrations of phosphate ions eluted during defluoridation were compared to fluoride ions removed by bone char, and phosphate ions were found to be very low depending on the animal bone char used (Kawasaki et al, 2009). Ca 10 (PO 4 ) 6 (OH) 2 + 20F − + 2H + → 10CaF 2 + 6PO 4 3− + 2H 2 0 (3.4) At 95% confidence interval, 1% vs. 2% and 2% vs. 4% were found to be significantly different.…”

Section: Results and Discussion 31 Reactivation Of Fluoride Samentioning

confidence: 99%

“…Fluoride ion is known to exchange with hydroxyl, carbonate, hydrogen carbonate, and phosphate ions of bone char during fluoride removal from water using bone char (Bailey, 1972;Abe et al, 2004;Kawasaki et al, 2009). During reactivation of fluoride saturated bone char, three different concentrations of the Na solutions: 1%, 2%, and 4% were used.…”

Section: Results and Discussion 31 Reactivation Of Fluoride Samentioning

confidence: 99%

Efficiency of various sodium solutions in regeneration of fluoride saturated bone char for de-fluoridation

Kanyora¹,

Kinyanjui²,

Kariuki³

et al. 2014

IOSRJESTFT

View full text Add to dashboard Cite

“…The bone can be collected from various sources such as slaughterhouses, ranchlands, restaurants and markets in general (Akinyi 2013). Kawasaki et al (2009) reported fluoride adsorption capacities of bone chars produced from different animals, including cattle, pigs, chickens and fishes. They revealed that yielding of bone char from cattle was the highest and it provided higher capacity for fluoride adsorption than bone char from pigs, chickens and fishes.…”

Section: Introductionmentioning

confidence: 99%

Development of low-cost passive sampler from cow bone char for sampling of volatile organic compounds

Tala

Chantara

Thiansem

et al. 2016

Int. J. Environ. Sci. Technol.

View full text Add to dashboard Cite

A simple and low-cost passive sampler for collection of volatile organic compounds, specifically benzene, toluene, ethylbenzene and xylene (BTEX), from the ambient air has been developed by using cow bone char (CBC) as an adsorbent with desorption by solvent extraction prior to analysis by gas chromatography-mass spectrometry (GC-MS). The laboratory-made CBC was prepared by calcination process in a partially oxidative atmosphere. The developed passive sampler was tested for a suitable amount of CBC used, diffusion tube type and size, and sampling duration, in a closed chamber saturated with each of the BTEX vapors. With the optimum amount of 250 mg CBC packed in a glass bottle (82.6 mm height 9 11.1 mm i.d.) and the exposure time of 168 h, detection limits (lg/m 3 ) for BTEX determination using this developed sampler together with GC-MS were 0.28 (benzene), 0.79 (toluene), 0.58 (ethylbenzene), 0.28 (p-xylene) and 0.54 (o-xylene). The proposed method was applied to sampling BTEX from selected petrol stations, traffic congestion areas and a rural area in Chiang Mai Province, Thailand. The BTEX concentrations detected were well correlated with their sources as they were the highest at the petrol station sites, lower at the traffic congestion area sites and the lowest at the rural area site. The laboratory-made passive sampler containing CBC has thus opened up a possibility of having a simple and effective device for sampling of BTEX in the ambient air.

show abstract

Removal of Fluoride Ion by Bone Char Produced from Animal Biomass

Cited by 43 publications

References 11 publications

Defluoridation with Locally Produced Thai Bone Char

Defluoridation with Locally Produced Thai Bone Char

Efficiency of various sodium solutions in regeneration of fluoride saturated bone char for de-fluoridation

Development of low-cost passive sampler from cow bone char for sampling of volatile organic compounds

Contact Info

Product

Resources

About