In the present paper

a metal-organic framework Cr-BDC was prepared and used as adsorbent for adsorption of

o

-nitrophenol (ONP) and

p

-nitrophenol (PNP) from aqueous solutions. Cr-BDC was characterized by scanning electron microscopy

transmission electron microscope

X-ray diffraction and BET methods. The results indicate that Cr-BDC gets a very large specific surface area of 4128 m

2

·g

-1

and pore sizes are concentrated in 1 nm

which is a benefit for using for wastewater treatment. The influences of the adsorption conditions

such as temperature

solution concentration

adsorption time and reusability on adsorption performance were investigated. Cr-BDC exhibited an encouraging uptake capacity of 310.0 mg·g

-1

for ONP

and adsorption capacity of Cr-BDC for ONP is significantly higher than that for PNP under suitable adsorption conditions. The characterizations of adsorption process were examined with the Lagergren pseudo-first-order

the pseudo-second-order kinetic model

and the intra-particular diffusion model. Kinetics experiments indicated that the pseudo-second-order model displayed the best correlation with adsorption kinetics d

ata. Furthermore

our adsorption equilibrium data could be better described by the Freundlich equation. The results indicate that the as-prepared Cr-BDC is promising for use as an effective and economical adsorbent for ONP removal.