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| Study on Catalytic Decomposition Kinetics and Products of Phenol with Peroxide and Pyrrhotite |
| WU Da-qing, DIAO Gui-yi, YUAN Peng |
| Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China |
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Abstract The catalytic decomposition kinetics of phenol with hydrogen peroxide and sulfide mineral pyrrhotite (Fe1-xS) were investigated by using batch experimental technique under normal temperature.Results shown that as solution pH in range 3.8-5.9 phenol can be decomposed completely with the kinetic rate k=4.0-212 h-1(g/L)-1,which is higher than that with hydrogen peroxide and iron oxide minerals,and be comparable to that with Fenton reagent.Else the solid catalysis pyrrhotite is easy to be separated from solution and reusable.The both of analytic results of violet spectra and concentrations of Fe(Ⅱ) and Fe(Ⅲ) in reactive solution suggest that the processes of phenol decomposition is similar to Fenton reaction,the phenol is first transferred to polyphenols and then decomposed to carboxylic acid with TOC mineralizing degree 50%-58% depending solution pH.
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Received: 11 September 2006
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