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Rationally designed porous polystyrene encapsulated zirconium phosphate nanocomposite for highly efficient fluoride uptake in waters.

Zhang Q, Du Q, Jiao T, Zhang Z, Wang S, Sun Q, Gao F - Sci Rep (2013)

Bottom Line: Moreover outstanding sorption properties were also detected by involving series of commercial adsorbents (AA/magnetite/GFH/manganese sands) as references.Additionally, the exhausted ZrP-MPN could be regenerated readily by alkaline solution.Thus, ZrP-MPN was a promising material for fluoride retention in waters.

View Article: PubMed Central - PubMed

Affiliation: Hebei Key Laboratory of Applied Chemistry, School of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao, PR China. zhangqr@ysu.edu.cn

ABSTRACT
Fluoride pollution in waters has engulfed worldwide regions and an excess of fluoride intake always causes skeletal fluorosis. Herein, a novel hybrid nanomaterial ZrP-MPN was fabricated for fluoride retention by encapsulating nano-ZrP onto macroporous polystyrene materials modified with quaternary ammonium groups. The as-obtained materials exhibited favorable removal of fluoride ions from aqueous solution in presence of common anions (SO4(2-)/NO3(-)/Cl(-)) at high contents. Moreover outstanding sorption properties were also detected by involving series of commercial adsorbents (AA/magnetite/GFH/manganese sands) as references. Such satisfactory performances might be ascribed to the structural design of nanocomposite. (1) the CH2N(+)(CH3)3Cl groups enhances sorption diffusion and preconcentration in sorbent phase theoretically based on Donnan membrane principle; (2) the embedded ZrP nanoparticles also devotes to the efficient adsorption capacities due to its size-dependent specific properties. Additionally, the exhausted ZrP-MPN could be regenerated readily by alkaline solution. Thus, ZrP-MPN was a promising material for fluoride retention in waters.

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Effect of solution pH and corresponding Zr release on the uptake of fluoride ions onto ZrP-MPN.(conditions: 1 g/L ZrP-MPN, initial fluoride contents: 10 mg/L, 50 mL solution at 298 K).
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f3: Effect of solution pH and corresponding Zr release on the uptake of fluoride ions onto ZrP-MPN.(conditions: 1 g/L ZrP-MPN, initial fluoride contents: 10 mg/L, 50 mL solution at 298 K).

Mentions: To evaluate the sorption properties towards fluoride ions, batch sorption tests were performed by conventional bottle-points methods. Solution pH is one of the most important parameters, which directly influences the adsorption behaviors of fluoride ions. Herein, the effects of solution pH on fluoride retention were investigated and the results were shown in Figure 3. It was observed that the fluoride uptake onto the resulting material ZrP-MPN was a pH-dependent process and the optimal sorption condition was pHs = 3.0. Further increase or decrease in pH values could bring about the unfavorable fluoride ions removal. In general, the hybrid nanomaterial contains two different sorption sites, i.e. the quaternary ammonium (-CH2N+(CH3)3Cl) binding to the host matrix and the embedded ZrP nanoparticles. The detailed reaction mechanisms were presented in Figure 43742.


Rationally designed porous polystyrene encapsulated zirconium phosphate nanocomposite for highly efficient fluoride uptake in waters.

Zhang Q, Du Q, Jiao T, Zhang Z, Wang S, Sun Q, Gao F - Sci Rep (2013)

Effect of solution pH and corresponding Zr release on the uptake of fluoride ions onto ZrP-MPN.(conditions: 1 g/L ZrP-MPN, initial fluoride contents: 10 mg/L, 50 mL solution at 298 K).
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3757354&req=5

f3: Effect of solution pH and corresponding Zr release on the uptake of fluoride ions onto ZrP-MPN.(conditions: 1 g/L ZrP-MPN, initial fluoride contents: 10 mg/L, 50 mL solution at 298 K).
Mentions: To evaluate the sorption properties towards fluoride ions, batch sorption tests were performed by conventional bottle-points methods. Solution pH is one of the most important parameters, which directly influences the adsorption behaviors of fluoride ions. Herein, the effects of solution pH on fluoride retention were investigated and the results were shown in Figure 3. It was observed that the fluoride uptake onto the resulting material ZrP-MPN was a pH-dependent process and the optimal sorption condition was pHs = 3.0. Further increase or decrease in pH values could bring about the unfavorable fluoride ions removal. In general, the hybrid nanomaterial contains two different sorption sites, i.e. the quaternary ammonium (-CH2N+(CH3)3Cl) binding to the host matrix and the embedded ZrP nanoparticles. The detailed reaction mechanisms were presented in Figure 43742.

Bottom Line: Moreover outstanding sorption properties were also detected by involving series of commercial adsorbents (AA/magnetite/GFH/manganese sands) as references.Additionally, the exhausted ZrP-MPN could be regenerated readily by alkaline solution.Thus, ZrP-MPN was a promising material for fluoride retention in waters.

View Article: PubMed Central - PubMed

Affiliation: Hebei Key Laboratory of Applied Chemistry, School of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao, PR China. zhangqr@ysu.edu.cn

ABSTRACT
Fluoride pollution in waters has engulfed worldwide regions and an excess of fluoride intake always causes skeletal fluorosis. Herein, a novel hybrid nanomaterial ZrP-MPN was fabricated for fluoride retention by encapsulating nano-ZrP onto macroporous polystyrene materials modified with quaternary ammonium groups. The as-obtained materials exhibited favorable removal of fluoride ions from aqueous solution in presence of common anions (SO4(2-)/NO3(-)/Cl(-)) at high contents. Moreover outstanding sorption properties were also detected by involving series of commercial adsorbents (AA/magnetite/GFH/manganese sands) as references. Such satisfactory performances might be ascribed to the structural design of nanocomposite. (1) the CH2N(+)(CH3)3Cl groups enhances sorption diffusion and preconcentration in sorbent phase theoretically based on Donnan membrane principle; (2) the embedded ZrP nanoparticles also devotes to the efficient adsorption capacities due to its size-dependent specific properties. Additionally, the exhausted ZrP-MPN could be regenerated readily by alkaline solution. Thus, ZrP-MPN was a promising material for fluoride retention in waters.

Show MeSH
Related in: MedlinePlus