Fluoride adsorption properties of cerium-containing bone char

Zúñiga-Muro, N.M.; Bonilla-Petriciolet, Adrián; Mendoza-Castillo, Didilia I.; Reynel-Ávila, Hilda Elizabeth; Tapia-Picazo, Juan Carlos

doi:10.1016/j.jfluchem.2017.03.004

Cited by 58 publications

(15 citation statements)

References 40 publications

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“…However, chromium adsorption has caused reduction of the specific surface area of the adsorbent and volume of the pores, which is a reason for occupation and filling of pores by chromium ions. These results are in line with the results obtained by Zúñiga‐Muro et al who have dealt with investigation of specific surface area properties of raw and modified bone char.…”

Section: Resultssupporting

confidence: 92%

Chromium(VI) removal by bone char–ZnO composite: Parameters optimization by response surface methodology and modeling

Ranjbar

Hashemi

Ramavandi

et al. 2018

Env Prog and Sustain Energy

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This study presents the efficiency of bone char‐ –ZnO for eliminating chromium(VI) from aqueous solutions. The bone char‐ –ZnO composite was provided using sol‐–gel method. The elemental, morphology, surface analysis of bone char‐ –ZnO were fully studied. The prepared composite was mostly composed of Ca5(PO4)3OH and had a specific surface area of 28.09 m2/g. Results indicated that central composite design (CCD) has a desirable ability (R2 > 0.87) to predict chromium(VI) removal by bone char‐ –ZnO. Furthermore, the results suggest that the removal efficiency increased with the elevation of adsorbent dose, shaking rate, temperature, and contact time. Isotherm and kinetics investigation indicated that chromium adsorption process follows Langmuir model (R2 > 0.97 and Qm= 84.03 mg/g) and second‐ order kinetic model (R2 > 0.999). The values of ΔH° and ΔS° of the chromium adsorption reaction by bone char‐ –ZnO were obtained as 580 kJ/mol and 5.5 kJ/mol K, respectively, suggesting spontaneity and endothermicity of the reaction. Desorption study was also performed by two desorbent agents of distilled water and nitric acid. Overall, it can be concluded that the bone char‐ –ZnO composite is an efficient and potential adsorbent to be used in water and wastewater treatment plants. © 2018 American Institute of Chemical Engineers Environ Prog, 37: 1684–1695, 2018

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Section: Resultssupporting

confidence: 92%

Chromium(VI) removal by bone char–ZnO composite: Parameters optimization by response surface methodology and modeling

Ranjbar

Hashemi

Ramavandi

et al. 2018

Env Prog and Sustain Energy

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“…With the increase of temperature, the adsorbed amounts of fluoride increase continuously. The maximum adsorption capacity ( q m ) of fluoride on CNT-HAP at 25°C is 11.05 mg·g −1 , being higher than pristine HAP and other HAP-based materials reported in the literature (Table 1 ; Gao et al, 2009 ; Sairam Sundaram et al, 2009 ; Jiménez-Reyes and Solache-Ríos, 2010 ; Liu et al, 2010 ; Kanno et al, 2014 ; Prabhu and Meenakshi, 2014 ; He et al, 2017 ; Nigri et al, 2017 ; Zúñiga-Muro et al, 2017 ).…”

Section: Resultsmentioning

confidence: 63%

Enhanced Defluoridation Capacity From Aqueous Media via Hydroxyapatite Decorated With Carbon Nanotube

Tang

Duan

et al. 2018

Front. Chem.

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In this work, the potential of a novel hydroxyapatite decorated with carbon nanotube composite (CNT-HAP) for fluoride removal was investigated. The synthesized CNT-HAP composite was systematically characterized by X-ray diffraction(XRD), Fourier Transform infrared spectroscopy(FTIR), scanning electron microscope (SEM) and Brunauer–Emmett–Teller(BET). Batch adsorption experiments were conducted to investigate the defluorination capacity of CNT-HAP. The CNT-HAP composite has a maximum adsorption capacity of 11.05 mg·g−1 for fluoride, and the isothermal adsorption data were fitted by the Freundlich model to calculate the thermodynamic parameters. Thermodynamic analysis implies that the adsorption of fluoride on CNT-HAP is a spontaneous process. Furthermore, the adsorption of fluoride follows pseudo-second-order model. The effects of solution pH, co-existing anions and reaction temperature on defluorination efficiency were examined to optimize the operation conditions for fluoride adsorption. It is found that the optimized pH-value for fluoride removal by CNT-HAP composite is 6. In addition, among five common anions studied in this work, the presence of HCO3- and PO43- could considerably affect the fluoride removal by CNT-HPA in aqueous media. Finally, the underlying mechanism for the fluoride removal by CNT-HAP is analyzed, and an anion exchange process is proposed.

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“…Zuniga-Muro et al were investigated defluoridation of water by doped two different cerium precursors (Ce 3+ and Ce 4+ ) onto cattle bone char. The results showed that a significant enhancement in the adsorption capacity of fluoride on to the Ce 4+ modified bone char composite from 5.47 to 13.6 mg/g at pH 7 [37]. Zhu et al were investigated defluoridation of water by cattle bone char after modification with different aluminum salts (AlCl 3 , AlNO 3 , NaAlO 2 , Al 2 (SO 4 ) 3 ) [38].…”

Section: Natural and Modified Activated Carbon/carbon-based Wastementioning

confidence: 99%

Carbon-Based Materials for De-Fluoridation of Water: Current Status and Challenges

Kumar¹,

Chawla²

2020

Carbon-Based Material for Environmental Protection and Remediation

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World is facing scarcity of pure and safe drinkable water and third world war would be based on this issue. Recently ground water is excessively used to meet drinking water needs. Water is the principal source of fluoride in daily intake. Excessive fluoride content in ground water due to leaching from fluoride bearing rocks, pose a serious threat worldwide. Concentration of fluoride in drinking water beyond the recommended standards may lead to serious health problems such as skeletal problems, restricted movement, severe anemia and fluorosis. De-fluoridation of water is quite difficult and expensive. Various materials and technologies have been developed to solve this world wide problem. Ion-exchange, precipitation, electro-chemical, reverse osmosis and adsorption are most widely applied methods for de-fluoridation of water. The main highlight of this chapter is to identify and compare carbon-based materials for de-fluoridation of water on the basis of their efficiency, cost and availability. Challenges associated with the development and use of cost effective and environmental friendly materials for de-fluoridation of water have also been discussed.

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Fluoride adsorption properties of cerium-containing bone char

Cited by 58 publications

References 40 publications

Chromium(VI) removal by bone char–ZnO composite: Parameters optimization by response surface methodology and modeling

Chromium(VI) removal by bone char–ZnO composite: Parameters optimization by response surface methodology and modeling

Enhanced Defluoridation Capacity From Aqueous Media via Hydroxyapatite Decorated With Carbon Nanotube

Carbon-Based Materials for De-Fluoridation of Water: Current Status and Challenges

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