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.