Nanoparticulate Zero-valent Iron Coated with FeOOH as Fenton-like Catalyst to Degrade Nitrobenzene
YAO Hai-rui;ZHANG Jiang-hua;XU Xin;WU Yao-guo;HU Si-hai;Department of Applied Chemistry/Northwestern Polytechnical University;Xi'an Center of Geological Survey,CGS;
Nanoparticulate zero-valent iron(n ZVI) coated with Fe OOH was employed as catalyst to built a heterogeneous Fenton-like system to degrade nitrobenzene(NB) in simulated wastewater. The effects of p H value, n ZVI dose and hydrogen peroxide(H2 O2) concentration were determined. NB was effectively removed under certain congdiation. The optimum dosage of n ZVI and H2 O2 were found to be 0.3 g/L and 15 mmol/L, respectively and 92% removal of NB was observed within 120 min at these conditions at an initial p H and initial NB concentration of 4.0 and 35 mg/L, respectively. The initial p H range of solutions can be extended to 5.0 by n ZVI particles coated with Fe OOH, which is an important advantage for application. The sequential n ZVI/H2 O2 processes was more efficient than the simulataneous process.
【CateGory Index】： X703;TB383.1