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Synthesis of magnetic metal-organic framework (MOF) for efficient removal of organic dyes from water.

Zhao X, Liu S, Tang Z, Niu H, Cai Y, Meng W, Wu F, Giesy JP - Sci Rep (2015)

Bottom Line: Adsorption capacity was 84 mg MB g(-1) at an initial MB concentration of 30 mg L(-1), which increased to 245 mg g(-1) when the initial MB concentration was 300 mg L(-1).This capacity was much greater than most other adsorbents reported in the literature.In addition, MFC adsorbents possess excellent reusability, being effective after at least five consecutive cycles.

View Article: PubMed Central - PubMed

Affiliation: State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.

ABSTRACT
A novel, simple and efficient strategy for fabricating a magnetic metal-organic framework (MOF) as sorbent to remove organic compounds from simulated water samples is presented and tested for removal of methylene blue (MB) as an example. The novel adsorbents combine advantages of MOFs and magnetic nanoparticles and possess large capacity, low cost, rapid removal and easy separation of the solid phase, which makes it an excellent sorbent for treatment of wastewaters. The resulting magnetic MOFs composites (also known as MFCs) have large surface areas (79.52 m(2) g(-1)), excellent magnetic response (14.89 emu g(-1)), and large mesopore volume (0.09 cm(3) g(-1)), as well as good chemical inertness and mechanical stability. Adsorption was not drastically affected by pH, suggesting π-π stacking interaction and/or hydrophobic interactions between MB and MFCs. Kinetic parameters followed pseudo-second-order kinetics and adsorption was described by the Freundlich isotherm. Adsorption capacity was 84 mg MB g(-1) at an initial MB concentration of 30 mg L(-1), which increased to 245 mg g(-1) when the initial MB concentration was 300 mg L(-1). This capacity was much greater than most other adsorbents reported in the literature. In addition, MFC adsorbents possess excellent reusability, being effective after at least five consecutive cycles.

No MeSH data available.


Related in: MedlinePlus

Mechanism of adsorption of MB on Fe3O4/Cu3(BTC)2 (a) Effect of pH on MB adsorption. (b) Effect of reaction time (the right one describes the pseudo-second-order kinetic) on MB removal. (c) Effect of solution temperature on MB removal. (d) Recyclability of Fe3O4/Cu3(BTC)2 for removing MB from aqueous solution.
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f5: Mechanism of adsorption of MB on Fe3O4/Cu3(BTC)2 (a) Effect of pH on MB adsorption. (b) Effect of reaction time (the right one describes the pseudo-second-order kinetic) on MB removal. (c) Effect of solution temperature on MB removal. (d) Recyclability of Fe3O4/Cu3(BTC)2 for removing MB from aqueous solution.

Mentions: Efficiencies of removal of MB were directly proportional to pH in the range of 2–11 (Fig. 5a). At greater pH, the surface of the adsorbent is negatively charged, which favors electrostatic interaction of cationic species of dye with the negatively charged surface. The electrostatic attraction force of MB with Fe3O4/Cu3(BTC)2 is likely to be greater at greater values of pH. Also, adsorption was not drastically affected by pH, suggesting the π-π stacking interaction and/or hydrophobic interactions between MB and Fe3O4/Cu3(BTC)2. These results are consistent with reports in the literature72930.


Synthesis of magnetic metal-organic framework (MOF) for efficient removal of organic dyes from water.

Zhao X, Liu S, Tang Z, Niu H, Cai Y, Meng W, Wu F, Giesy JP - Sci Rep (2015)

Mechanism of adsorption of MB on Fe3O4/Cu3(BTC)2 (a) Effect of pH on MB adsorption. (b) Effect of reaction time (the right one describes the pseudo-second-order kinetic) on MB removal. (c) Effect of solution temperature on MB removal. (d) Recyclability of Fe3O4/Cu3(BTC)2 for removing MB from aqueous solution.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4493573&req=5

f5: Mechanism of adsorption of MB on Fe3O4/Cu3(BTC)2 (a) Effect of pH on MB adsorption. (b) Effect of reaction time (the right one describes the pseudo-second-order kinetic) on MB removal. (c) Effect of solution temperature on MB removal. (d) Recyclability of Fe3O4/Cu3(BTC)2 for removing MB from aqueous solution.
Mentions: Efficiencies of removal of MB were directly proportional to pH in the range of 2–11 (Fig. 5a). At greater pH, the surface of the adsorbent is negatively charged, which favors electrostatic interaction of cationic species of dye with the negatively charged surface. The electrostatic attraction force of MB with Fe3O4/Cu3(BTC)2 is likely to be greater at greater values of pH. Also, adsorption was not drastically affected by pH, suggesting the π-π stacking interaction and/or hydrophobic interactions between MB and Fe3O4/Cu3(BTC)2. These results are consistent with reports in the literature72930.

Bottom Line: Adsorption capacity was 84 mg MB g(-1) at an initial MB concentration of 30 mg L(-1), which increased to 245 mg g(-1) when the initial MB concentration was 300 mg L(-1).This capacity was much greater than most other adsorbents reported in the literature.In addition, MFC adsorbents possess excellent reusability, being effective after at least five consecutive cycles.

View Article: PubMed Central - PubMed

Affiliation: State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.

ABSTRACT
A novel, simple and efficient strategy for fabricating a magnetic metal-organic framework (MOF) as sorbent to remove organic compounds from simulated water samples is presented and tested for removal of methylene blue (MB) as an example. The novel adsorbents combine advantages of MOFs and magnetic nanoparticles and possess large capacity, low cost, rapid removal and easy separation of the solid phase, which makes it an excellent sorbent for treatment of wastewaters. The resulting magnetic MOFs composites (also known as MFCs) have large surface areas (79.52 m(2) g(-1)), excellent magnetic response (14.89 emu g(-1)), and large mesopore volume (0.09 cm(3) g(-1)), as well as good chemical inertness and mechanical stability. Adsorption was not drastically affected by pH, suggesting π-π stacking interaction and/or hydrophobic interactions between MB and MFCs. Kinetic parameters followed pseudo-second-order kinetics and adsorption was described by the Freundlich isotherm. Adsorption capacity was 84 mg MB g(-1) at an initial MB concentration of 30 mg L(-1), which increased to 245 mg g(-1) when the initial MB concentration was 300 mg L(-1). This capacity was much greater than most other adsorbents reported in the literature. In addition, MFC adsorbents possess excellent reusability, being effective after at least five consecutive cycles.

No MeSH data available.


Related in: MedlinePlus