A new synthesis route for bone chars using CO2 atmosphere and their application as fluoride adsorbents

Rojas-Mayorga, Cintia Karina; Silvestre-Albero, Joaquín; Aguayo‐Villarreal, Ismael Alejandro; Mendoza-Castillo, Didilia I.; Bonilla-Petriciolet, Adrián

doi:10.1016/j.micromeso.2014.09.002

Cited by 70 publications

(30 citation statements)

References 34 publications

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“…This novel bone char (BC-AlS) showed a maximum experimental fluoride uptake of 31 mg/g, which is 423% higher than that obtained for the raw bone char (i.e., 7.32 mg/g) reported in our previous study [7]. Also, this adsorbent exceeded up to 600% the fluoride uptakes reported for commercial bone chars [18] and other adsorbents reported in the literature [7,8,, see Fig. 2b.…”

Section: Resultssupporting

confidence: 44%

“…In particular, the bone char has been considered as an adsorbent with the best efficacy -cost tradeoff for the fluoride removal from drinking water and its performance has been investigated in several studies [4,7,8,17,18]. This adsorbent is commercially available worldwide and its adsorption capacities range from 1 to 5 mg/g depending on the supplier [17][18][19].…”

Section: Introductionmentioning

confidence: 99%

“…This adsorbent is commercially available worldwide and its adsorption capacities range from 1 to 5 mg/g depending on the supplier [17][18][19]. Our previous studies have concluded that it is feasible to maximize its fluoride uptake if proper pyrolysis conditions are used for bone char synthesis [7,8]. However, the fluoride adsorption properties of bone char can be improved by the incorporation of metallic species on its surface.…”

Section: Introductionmentioning

confidence: 99%

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Physico-chemical characterization of metal-doped bone chars and their adsorption behavior for water defluoridation

Rojas-Mayorga

Bonilla-Petriciolet

Silvestre-Albero

et al. 2015

Applied Surface Science

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Section: Resultssupporting

confidence: 44%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Physico-chemical characterization of metal-doped bone chars and their adsorption behavior for water defluoridation

Rojas-Mayorga

Bonilla-Petriciolet

Silvestre-Albero

et al. 2015

Applied Surface Science

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“…White color indicates the complete degradation of organic matter, whereas dark color indicates the remaining of organic compounds (Ooi et al 2007). However, the specific surface area is decreased at high-temperature treatment due to an increase in hydroxyapatite crystallite size and loss of elemental carbon (Rojas-Mayorga et al 2014). According to the literature (Buxbsum 1998;Rojas-Mayorga et al 2014), when the specific surface area (S BET ) is increased, the chance of adsorbent-adsorbate interaction is also increasing.…”

Section: Physical Properties Of Lm-cbcmentioning

confidence: 99%

“…However, the specific surface area is decreased at high-temperature treatment due to an increase in hydroxyapatite crystallite size and loss of elemental carbon (Rojas-Mayorga et al 2014). According to the literature (Buxbsum 1998;Rojas-Mayorga et al 2014), when the specific surface area (S BET ) is increased, the chance of adsorbent-adsorbate interaction is also increasing. This is a positive effect to adsorption process.…”

Section: Physical Properties Of Lm-cbcmentioning

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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Bone‐derived biochar and magnetic biochar for effective removal of fluoride in groundwater: Effects of synthesis method and coexisting chromium

Zhou

Liu

Han

et al. 2019

Water Environment Research

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The presence of fluoride in groundwater in excess of 1.5 mg L−1 is a major environmental health concern, and biochar is a promising low‐cost adsorbent for the treatment of such water. In the present study, pristine and magnetic biochars were synthesized by peanut hull and bovine bone for the adsorption of fluoride. The biochars were systematically characterized by SEM‐EDS, BET, XRD, VSM, FT‐IR, and XPS. The experiment results showed that the magnetic biochar prepared by soaking biomass in FeCl3 solution and then pyrolyzing (“prepyrolysis”) had a higher adsorption capacity than that prepared by mixing pristine biochar with Fe2+/Fe3+ solution and then treating with NaOH (“postpyrolysis”). The bone‐derived biochar and magnetic biochar exhibited high adsorption capacity of fluoride (>5 mg g−1) due to the presence of hydroxyapatite (HAP) and γ‐Fe2O3. The 0.1 M NaOH solution could be optimal desorption agent, and the adsorption–desorption experiments indicated the bone biochars maintained the reasonable adsorption capacity after several cycles. Moreover, the coexisting Cr(VI) and fluoride could be removed simultaneously by bone‐derived biochars. It is suggested that bovine bone‐derived pristine and magnetic biochars can be used as preferential adsorbents for fluoride removal from contaminated groundwater.Practitioner points Bone‐derived pristine and magnetic biochars exhibit high adsorption capacity for fluoride in weakly alkaline solution. The presence of hydroxyapatite and γ‐Fe2O3 in bone‐derived biochars plays an important role for fluoride adsorption. Magnetic biochars prepared by soaking biomass in FeCl3 solution and then pyrolyzing (“prepyrolysis”) perform better. The coexisting Cr(VI) and fluoride can be simultaneously removed in groundwater by bone biochars.

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A new synthesis route for bone chars using CO2 atmosphere and their application as fluoride adsorbents

Cited by 70 publications

References 34 publications

Physico-chemical characterization of metal-doped bone chars and their adsorption behavior for water defluoridation

Physico-chemical characterization of metal-doped bone chars and their adsorption behavior for water defluoridation

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

Bone‐derived biochar and magnetic biochar for effective removal of fluoride in groundwater: Effects of synthesis method and coexisting chromium

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