Adsorption capacity of bone char for removing fluoride from water solution. Role of hydroxyapatite content, adsorption mechanism and competing anions

Castillo, Nahúm Andrés Medellín; Leyva‐Ramos, Roberto; Padilla-Ortega, Érika; Pérez, Raúl Ocampo; Flores-Cano, J.V.; Berber-Mendoza, M.S.

doi:10.1016/j.jiec.2013.12.105

Cited by 154 publications

(76 citation statements)

References 30 publications

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“…Generally, the specific adsorption amount of the adsorbent decreases at low equilibrium pollutant concentrations in the solution. To reduce the fluoride concentration in wastewater to around 5 mg L -1 , the adsorption capacity of carbonate materials such as bone char is 1-4 mg g -1 , whereas, for more expensive polymeric resin, the adsorption capacity is 7 mg g -1 [14,15]. Figure 5 shows that the specific removal amount for the aluminum method falls to a few milligrams per gram when the final fluoride concentration is a few milligrams per liter.…”

Section: Efficiency Of Fluoride Removal and Sludge Generationmentioning

confidence: 99%

“…FAp and HAp is stable in neutral pH range [6]. However, the adsorption capacity of HAp for ionic fluoride is only a few milligrams per gram when fluoride must be removed to levels around 5-8 mg L -1 [14,15]. Consequently, large amounts of HAp would be required for water treatment, and large amounts of FAp-containing sludge would be generated as a result.…”

Section: Introductionmentioning

confidence: 99%

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Properties of sludge generated by the treatment of fluoride-containing wastewater with dicalcium phosphate dihydrate

Tafu

Arioka

Takamatsu

et al. 2016

Euro-Mediterr J Environ Integr

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Fluoride-containing wastewater is discharged from various industrial sites, including semiconductor, plating, and metal-treatment plants. To remove the fluoride, we treated wastewater with dicalcium phosphate dihydrate (DCPD, CaHPO 4 Á2H 2 O) to form fluorapatite [Ca 10 (PO 4 ) 6 F 2 ] crystals. We investigated the fluoride removal efficiency and the properties of the resulting sludge. For comparison, we also treated wastewater using conventional aluminum coprecipitation. The DCPD used in this study was a by-product of the gelatin industry. Nanoscale precursor particles were induced on the DCPD by treatment with warm water. After treatment of fluoridecontaining wastewater in batch experiments, the amount, particle size distribution, settleability, and filterability of the resulting sludge were measured to assess the usability of DCPD. We found that the amount of chemical additives required for the DCPD method was less than that for the conventional method. Additionally, the amount of sludge produced using the DCPD method was small and the final fluoride concentration was below 5 mg L -1 . In settleability tests, the sludge produced by the DCPD method was precipitated within 10 min. In filterability tests, most DCPD sludge was separated within 5 min. The settleability and filterability of sludge from the DCPD method were better than those of the conventional method. The release of fluoride from the DCPD sludge was below the levels stipulated by Japanese soil pollution regulations. Consequently, the sludge was considered unlikely to cause soil pollution, thereby facilitating landfill management. We concluded that DCPD can be used effectively to treat fluoride-containing wastewater and that the resulting sludge is unlikely to cause environmental damage.

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Section: Efficiency Of Fluoride Removal and Sludge Generationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Properties of sludge generated by the treatment of fluoride-containing wastewater with dicalcium phosphate dihydrate

Tafu

Arioka

Takamatsu

et al. 2016

Euro-Mediterr J Environ Integr

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“…Najčešće primenjivane metode su koagulacija i hemijsko taloženje, membranski procesi (reverzna osmoza, nanofiltracija dijaliza), elektrohemijski procesi, jonoizmenjivački procesi kao i mnogobrojne vrste adsorpcije [1, [13][14][15]. Međutim, usled visokih investicionih i/ili operativnih troškova, kao i ograničenih radnih uslova, većina ovih metoda i pored če-sto velike efikasnosti ima i značajne nedostatke, naročito pri niskim koncentracijama fluorida, koje su realno prisutne u vodi za piće.…”

Section: Uvodunclassified

“…Zato se uklanjanje fluorida najčešće vrši adsorpcijom, usled njene jednostavnosti, niske cene, kao i činjenice da se može primeniti i pri niskim koncentracijama fluoridnih jona [1, 13,16]. Najčešće korišćeni prirodni i veštački adsorbenti za fluor su aktivni ugalj i razni karbonatni materijali, aktivna alumina, hidroksiapatiti, zeoliti, oksidi cirkonijuma, gvožđa i cerijuma, gline, kao i mnogi drugi materijali [1, 14,17]. Poslednjih godina sve veću popularnost stiču i biosorbenti od kojih se najviše ispituju hitin, hitozan, alginat, celuloza, i razne poljoprivredne i biološke otpadne biomase od lišća, algi, kvasaca, bakterija i dr. [5,15,17,18].…”

Section: Uvodunclassified

Fluoride ion adsorption onto Al-alginate particles

Milivojević¹,

Jocic²,

Lopičić³

et al. 2017

Zas Mat

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“…Therefore, the compounds have more chance to be adsorbed on the active site by non-specific attraction (van der Waal force). The CBC contains about 10 % elementary carbon and 90 % hydroxyapatite (Medellin-Castillo et al 2014). The inorganic part presents the ability to adsorb ions, while the organic part presents the ability to nonpolar organic compounds (RojasMayorga et al 2014).…”

Section: Comparison Of Diffusion Bottlesmentioning

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.

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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.

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Adsorption capacity of bone char for removing fluoride from water solution. Role of hydroxyapatite content, adsorption mechanism and competing anions

Cited by 154 publications

References 30 publications

Properties of sludge generated by the treatment of fluoride-containing wastewater with dicalcium phosphate dihydrate

Properties of sludge generated by the treatment of fluoride-containing wastewater with dicalcium phosphate dihydrate

Fluoride ion adsorption onto Al-alginate particles

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

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