Surface modification of hollow magnetic Fe3O4@NH2-MIL-101(Fe) derived from metal-organic frameworks for enhanced selective removal of phosphates from aqueous solution

Li, Yan; Xie, Qiang; Hu, Qian; Li, Chengping; Huang, Zhangjie; Yang, Xiangjun; Guo, Hong

doi:10.1038/srep30651

Cited by 75 publications

(36 citation statements)

References 40 publications

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“…The structures of the as-prepared magnetic iron(III)-based framework composites were identified by the powder XRD. Their XRD patterns ( Figure 3A [20,27,28,31,32]. And the diffraction peaks at high angle at 2θ > 30 • match well with the cubic phase of Fe 3 O 4 -COOH particles [25].…”

Section: Preparation and Characterization Of The Magnetic Iron(iii)-bmentioning

confidence: 66%

“…Li et al. grew NH 2 ‐MIL‐101 onto hollow magnetic Fe 3 O 4 by layer‐by‐layer procedure for enhanced selective removal of phosphates from aqueous solution .…”

Section: Introductionmentioning

confidence: 99%

“…Wu et al reported a general one-step in situ pyrolysis approach for the construction of γ-Fe 2 O 3 @MIL-53 (Al) for drug delivery [19]. Li et al grew NH 2 -MIL-101 onto hollow magnetic Fe 3 O 4 by layer-by-layer procedure for enhanced selective removal of phosphates from aqueous solution [20].…”

Section: Introductionmentioning

confidence: 99%

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Magnetic iron(III)‐based framework composites for the magnetic solid‐phase extraction of fungicides from environmental water samples

Huang

Liu

et al. 2018

J of Separation Science

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We adopted a facile hydrofluoric acid-free hydro-/solvothermal method for the preparation of four magnetic iron(III)-based framework composites (MIL-101@Fe O -COOH, MIL-101-NH @Fe O -COOH, MIL-53@Fe O -COOH, and MIL-53-NH @Fe O -COOH). The obtained four magnetic iron(III)-based framework composites were applied to magnetic separation and enrichment of the fungicides (prochloraz, myclobutanil, tebuconazole, and iprodione) from environmental samples before high-performance liquid chromatographic analysis. MIL-101-NH @Fe O -COOH showed more remarkable pre-concentration ability for the fungicides as compared to the other three magnetic iron(III)-based framework composites. The extraction parameters affecting enrichment efficiency including extraction time, sample pH, elution time, and the desorption solvent were investigated and optimized. Under the optimized conditions, the standard curve of correlation coefficients were all above 0.991, the limits of detection were 0.04-0.4 μg/L, and the relative standard deviations were below 10.2%. The recoveries of two real water samples ranged from 71.1-99.1% at the low spiking level (30 μg/L). Therefore, the MIL-101-NH @Fe O -COOH composites are attractive for the rapid and efficient extraction of fungicides from environmental water samples.

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Section: Preparation and Characterization Of The Magnetic Iron(iii)-bmentioning

confidence: 66%

“…Li et al. grew NH 2 ‐MIL‐101 onto hollow magnetic Fe 3 O 4 by layer‐by‐layer procedure for enhanced selective removal of phosphates from aqueous solution .…”

Section: Introductionmentioning

confidence: 99%

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Magnetic iron(III)‐based framework composites for the magnetic solid‐phase extraction of fungicides from environmental water samples

Huang

Liu

et al. 2018

J of Separation Science

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“…Among these adsorbents, hollow magnetic Fe 3 O 4 @NH 2 -MIL-101(Fe) had the best performance in terms of partition coefficient (24.65 mg/g/µM). The reason behind these chemical interactions was the presence of partially positively-charged metal sites in the metal organic frameworks [30,31]. These positively charged metal sites can interact with negatively charged sites through electrostatic interactions, leading to the adsorption of phosphate ions [32].…”

Section: Performance Of Phosphorus Removal Adsorbentsmentioning

confidence: 99%

Kinetics and Thermodynamics of Efficient Phosphorus Removal by a Composite Fiber

Liu

2019

Applied Sciences

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In the current study, we investigated the kinetics and thermodynamics of phosphorus removal by zeolite/steel slag/fly ash/basalt (ZSFB) composite fiber. Kinetic analysis indicated that the adsorption of phosphorus is best fitted with the pseudo-second-order model. The maximum adsorption capacity of the fiber calculated by the Langmuir model was found to be 4.18 mg/g and the partition coefficient was 1.49 mg/g/µM. Thermodynamics results revealed that the Gibbs free energy ΔG0 of the composite fiber was negative, indicating that the adsorption is a spontaneous process; the standard enthalpy of reaction ΔH0 was positive, indicating that the adsorption is endothermic. Adsorption under different influencing factors and desorption experiments were conducted to investigate the phosphorus removal characteristics of ZSFB composite fiber. Dynamic adsorption and the phosphorus removal experiment were also conducted in a fixed-bed reactor to study factors affecting the time of breakthrough. Results indicate that the performance of ZSFB composite fiber was not relatively outstanding compared with nanomaterials and magnetic composites. However, its performance has already met the class A demands of “discharge standard of pollutants for municipal wastewater treatment plant” (GB18918-2002) which means it can be applied to remove phosphorus from real wastewater in a cost-effective way with low-priced raw materials.

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“…Multifunctional hollow porous microspheres, have been widely used in the fields of controlled release 11 , catalysis 12 , adsorption 13 , 14 , drug delivery 15 , 16 , electrode material 17 , sensors 18 and microreactors 19 . Recently, yeast 20 , 21 , pollen 22 , spores 23 , 24 and chlorella 25 have been converted into hollow porous microspheres by directly using the natural spherical morphology and components of these micro-organisms via hydrothermal carbonization (HTC), solvent extraction, or carbonization method.…”

Section: Introductionmentioning

confidence: 99%

From harmful Microcystis blooms to multi-functional core-double-shell microsphere bio-hydrochar materials

Pan

2017

Sci Rep

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Harmful algal blooms (HABs) induced by eutrophication is becoming a serious global environmental problem affecting public health and aquatic ecological sustainability. A novel strategy for the utilization of biomass from HABs was developed by converting the algae cells into hollow mesoporous bio-hydrochar microspheres via hydrothermal carbonization method. The hollow microspheres were used as microreactors and carriers for constructing CaO2 core-mesoporous shell-CaO2 shell microspheres (OCRMs). The CaO2 shells could quickly increase dissolved oxygen to extremely anaerobic water in the initial 40 min until the CaO2 shells were consumed. The mesoporous shells continued to act as regulators restricting the release of oxygen from CaO2 cores. The oxygen-release time using OCRMs was 7 times longer than when directly using CaO2. More interestingly, OCRMs presented a high phosphate removal efficiency (95.6%) and prevented the pH of the solution from rising to high levels in comparison with directly adding CaO2 due to the OH− controlled-release effect of OCRMs. The distinct core-double-shell micro/nanostructure endowed the OCRMs with triple functions for oxygen controlled-release, phosphorus removal and less impact on water pH. The study is to explore the possibility to prepare smarter bio-hydrochar materials by utilizing algal blooms.

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Surface modification of hollow magnetic Fe3O4@NH2-MIL-101(Fe) derived from metal-organic frameworks for enhanced selective removal of phosphates from aqueous solution

Cited by 75 publications

References 40 publications

Magnetic iron(III)‐based framework composites for the magnetic solid‐phase extraction of fungicides from environmental water samples

Magnetic iron(III)‐based framework composites for the magnetic solid‐phase extraction of fungicides from environmental water samples

Kinetics and Thermodynamics of Efficient Phosphorus Removal by a Composite Fiber

From harmful Microcystis blooms to multi-functional core-double-shell microsphere bio-hydrochar materials

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