Highly efficient and rapid fluoride scavenger using an acid/base tolerant zirconium phosphate nanoflake: Behavior and mechanism

Zhang, Qingrui; Li, Yixuan; Phanlavong, Pikky; Wang, Zikang; Jiao, Tifeng; Qiu, Hui; Peng, Qiuming

doi:10.1016/j.jclepro.2017.05.120

Cited by 72 publications

(22 citation statements)

References 51 publications

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“…Figure S7a shows the survey scan spectrum, in which C1s,N 1s,a nd O1s exist, obviously from the protein nanofibrils components,a nd the strong F1s peak located at about 685 eV suggests successful fluoride scavenging by amyloid fibrils/ZrO 2 (AF-Zr) and the hybrid CAF-Zr membrane. [19] Thea rea proportions of peak A:Ba re approximately 39.1 and 60.9 %r espectively,a nd similar results are also found in the hybrid CAF-Zr membrane with Fa dsorption (see Figure S8). Ad istinct peak shift to lower binding energy was observed for fluoride-loaded AF-Zr samples.T he expanded full width at half maximum (FWHM) values of about 2.35 eV,s uggests the presence of an ew fluoride complex.…”

Section: Angewandte Chemiesupporting

confidence: 70%

“…1.1 eV indicates the strong interaction between AF-Zr and Fi ons. [19] Thea rea proportions of peak A:Ba re approximately 39.1 and 60.9 %r espectively,a nd similar results are also found in the hybrid CAF-Zr membrane with Fa dsorption (see Figure S8). To identify the detailed interaction sites of the strong fluoride complexation, aZ r3 ds pectra investigation on hybrid the CAF-Zr mem-brane and SO 4 2À or Fion adsorbed samples.T he Zr 3d peaks from the CAF-Zr membranes display the representative doublet satellite peaks,centering at about 182.4 eV (Zr 3d 5/2 ) and 184.7 eV (Zr 3d 3/2 ;s ee Figure S7c).…”

Section: Angewandte Chemiesupporting

confidence: 70%

“…On the contrary,f luoride removal by IRA-900 dramatically declined at moderate concentrations.I mportantly,t he adsorption efficiency dropped to almost zero in the presence of additional anions,starting from concentrations higher than 400 mg L À1 .T his behavior can be ascribed to nonspecific adsorption for the quaternary ammonium [-CH 2 N(CH 3 ) 3 Cl] groups on the polystyrene matrix of the resin, and is driven by weak electrostatic forces. [19] Consequently,t he high concentration of common ions significantly competes with trace fluoride removal in the control adsorbent, whereas it is nearly irrelevant in the CAF-Zr membranes.…”

Section: Zuschriftenmentioning

confidence: 99%

“…Since other anionic species, such as SO 4 2À /Cl À /NO 3 À ,a re ubiquitous in fluoride-contaminated waters with high concentrations,i ti so fi mportance to estimate the removal selectivity of the hybrid membrane for fluoride purification. [19] Consequently,t he high concentration of common ions significantly competes with trace fluoride removal in the control adsorbent, whereas it is nearly irrelevant in the CAF-Zr membranes. Thef act that the presence of high concentrations of additional anions only slightly influences the adsorption efficiencyshows the powerful selectivity of the CAF-Zr membrane.…”

mentioning

confidence: 99%

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Selective and Efficient Removal of Fluoride from Water: In Situ Engineered Amyloid Fibril/ZrO₂ Hybrid Membranes

et al. 2019

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Section: Angewandte Chemiesupporting

confidence: 70%

Section: Angewandte Chemiesupporting

confidence: 70%

Section: Zuschriftenmentioning

confidence: 99%

mentioning

confidence: 99%

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Selective and Efficient Removal of Fluoride from Water: In Situ Engineered Amyloid Fibril/ZrO₂ Hybrid Membranes

et al. 2019

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“…Importantly, the adsorption efficiency dropped to almost zero in the presence of additional anions, starting from concentrations higher than 400 mg L −1 . This behavior can be ascribed to nonspecific adsorption for the quaternary ammonium [‐CH 2 N(CH 3 ) 3 Cl] groups on the polystyrene matrix of the resin, and is driven by weak electrostatic forces . Consequently, the high concentration of common ions significantly competes with trace fluoride removal in the control adsorbent, whereas it is nearly irrelevant in the CAF‐Zr membranes.…”

Section: Figurementioning

confidence: 99%

Selective and Efficient Removal of Fluoride from Water: In Situ Engineered Amyloid Fibril/ZrO₂ Hybrid Membranes

et al. 2019

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We report a new strategy for efficient removal of F− from contaminated water streams, and it relies on carbon hybrid membranes made of amyloid fibril/ZrO2 nanoparticles (<10 nm). These membranes exhibit superior selectivity for F− against various competitive ions, with a distribution coefficient (Kd) as high as 6820 mL g−1, exceeding commercial ion‐exchange resins (IRA‐900) by 180 times and outdoing the performance of most commercial carbon‐activated aluminum membranes. At both low and high (ca. 200 mg L−1) F− concentrations, the membrane efficiency exceeds 99.5 % removal. For real untreated municipal tap water (ca. 2.8 mg L−1) under continuous operating mode, data indicates that about 1750 kg water m−2 membrane can be treated while maintaining drinking water quality, and the saturated membranes can be regenerated and reused several times without decrease in performance. This technology is promising for mitigating the problem of fluoride water contamination worldwide.

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Polydopamine‐Grafted Graphene Oxide Composite Membranes with Adjustable Nanochannels and Separation Performance

Zhang

Jia

Qiu

et al. 2018

Adv Materials Inter

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amines with oxygen-containing groups on GO. [17] Gao et al. manufactured GO paper by air drying and then exposing it in glutaraldehyde vapors to realize cross-linking, by which the mechanical properties of the resulting paper were largely improved. [18] Fang et al. covalently grafted polystyrene chains onto the surface of GO sheets and thereby increased the tensile strength and Young's modulus. [19] These prior studies proved that GO nanosheets could be grafted with appropriate molecules and polymers to introduce new functional groups and make GO more flexible and versatile in applications.GO has been extensively applied in transparent conductors, optoelectronics, and composite materials. [20][21][22][23] Recently, GO nanosheets have attracted interest in constructing membranes and the relevant applications. [24][25][26][27] Generally, composite membranes produced from porous materials, such as zeolite and carbon molecular sieves show excellent performance on separation, gas storage, and electrochemistry, [28][29][30][31][32][33][34] however, theses membranes still have some intractable problems such as brittleness, poor thermal stability, and weak mechanical strength. Compared with these materials, GO is believed to be one of the most promising separation membrane materials. GO membranes can be produced by vacuum filtration or layer-by-layer assembly, and both methods are environmentally friendly. [35][36][37][38][39][40][41][42] In the process of filtration, the GO or the modified GO nanosheets stack tightly, forming an ordered laminate structure to act as the separation layer of membrane. The GO membranes can be used in many fields like dye removal, desalination, and pervaporation; and the structure of GO layer has great effects on the performance of membrane. [43][44][45][46] In this work, we report a strategy to adjust the microstructure of GO nanosheets and the size of nanochannels by grafting polydopamine (PDA) on GO, by which to construct composite membranes via simple vacuum filtration. The degree of polymerization can be well controlled by reaction time. Through this method, the size of nanochannels formed by two GO sheets could be adjusted with different PDA loading. Thereby, the separation performance of the as-obtained membranes can be controlled accordingly. The membranes with controllable interlayer space are promising for diverse applications.Graphene oxide (GO) is a unique 2D material that can form nanochannels between adjacent nanosheets, and has attracted concentrated interests in the field of molecule sieving. However, the size of the nanochannels is fixed and hard to change, which is undesirable when using GO-based membranes for separation. Herein, a strategy for controllable adjusting the microstructure of GO nanosheets and size of nanochannels by grafting polydopamine (PDA) on GO is reported. A series of PDA-g-GO composite membranes with different PDA loading are successfully fabricated by simple vacuum filtration. The composite membranes are used to separate 70 wt% ethanol-H 2 O mixture an...

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Highly efficient and rapid fluoride scavenger using an acid/base tolerant zirconium phosphate nanoflake: Behavior and mechanism

Cited by 72 publications

References 51 publications

Selective and Efficient Removal of Fluoride from Water: In Situ Engineered Amyloid Fibril/ZrO₂ Hybrid Membranes

Selective and Efficient Removal of Fluoride from Water: In Situ Engineered Amyloid Fibril/ZrO₂ Hybrid Membranes

Selective and Efficient Removal of Fluoride from Water: In Situ Engineered Amyloid Fibril/ZrO₂ Hybrid Membranes

Polydopamine‐Grafted Graphene Oxide Composite Membranes with Adjustable Nanochannels and Separation Performance

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Highly efficient and rapid fluoride scavenger using an acid/base tolerant zirconium phosphate nanoflake: Behavior and mechanism

Cited by 72 publications

References 51 publications

Selective and Efficient Removal of Fluoride from Water: In Situ Engineered Amyloid Fibril/ZrO2 Hybrid Membranes

Selective and Efficient Removal of Fluoride from Water: In Situ Engineered Amyloid Fibril/ZrO2 Hybrid Membranes

Selective and Efficient Removal of Fluoride from Water: In Situ Engineered Amyloid Fibril/ZrO2 Hybrid Membranes

Polydopamine‐Grafted Graphene Oxide Composite Membranes with Adjustable Nanochannels and Separation Performance

Contact Info

Product

Resources

About

Selective and Efficient Removal of Fluoride from Water: In Situ Engineered Amyloid Fibril/ZrO₂ Hybrid Membranes

Selective and Efficient Removal of Fluoride from Water: In Situ Engineered Amyloid Fibril/ZrO₂ Hybrid Membranes

Selective and Efficient Removal of Fluoride from Water: In Situ Engineered Amyloid Fibril/ZrO₂ Hybrid Membranes