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| Adsorption of Microcystin-LR in Water with Metal-Organic Framework MIL-101(Fe) |
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| DOI： |
| KeyWord:metal-organic frameworks adsorption microcystin MIL-101(Fe) |
| Author | Institution |
| LIAN Li-li，JIANG Xin-hao，DENG Yi-hui，LOU Da-wei |
Department of Analytical Chemistry,Jilin Institute of Chemical Technology |
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| Abstract: |
| A water stable metal-organic framework MIL-101(Fe) was synthesized by the solvothermal method,which could be employed as a high efficiency adsorbent for removal of microcystin-LR in aqueous solution.The as prepared nanomaterial was characterized by Electron microscopy,Fourier transformed infrared(FT-IR),zeta potential and N2 adsorption desorption measurement,respectively.The MIL-101(Fe) had a porous structure and a high specific surface area(375.2 m2/g) with an average size about 500 nm.Experimental parameters affecting the adsorption capacity,including pH,ionic strength and temperature,adsorption time and concentration were particularly optimized.Results indicated that the adsorption mechanisms could be expressed by the electrostatic attraction and coordination interaction between MIL-101(Fe) and microcystin-LR.The adsorption of microcystin-LR on MIL-101(Fe) was very fast as an adsorption equilibrium was obtained within 20 min,which agreed well with the pseudo second order model.Moreover,the porous MIL-101(Fe) exhibited an excellent adsorption property for microcystin-LR,with a maximum adsorption capacity of 256.4 mg/g.The humic acid in the solution could affect the adsorption capacity of MIL-101(Fe).Under the same conditions,the adsorption capacity for microcystin-LR in river water decreased due to the influence of humic acid and salts in real water samples.Nevertherless,the adsorption capacity still reached to 68.1 mg/g.Thus,the method is efficient and convenient,and is suitable for the rapid removal of microcystin-LR in contaminated water. |
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