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Study on Oxidative Degradation of Phenol by Iron and Manganese Oxides(PDF)

《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

Issue:
2011年第02期
Page:
191-195
Research Field:
资源与环境
Publishing date:

Info

Title:
Study on Oxidative Degradation of Phenol by Iron and Manganese Oxides
Author(s):
WEN Li-min1; ZHANG Jun2
1. School of Resources Environment and Earth Sciences, Yunnan University, Kunming 650091, Yunnan, China; 2. School of Geological Engineering and Surveying, Chang'an University, Xi'an 710054, Shaanxi, China
Keywords:
oxide;  phenol;  degradation;  pH;  soil;  phenolic pollution;  goethite;  manganese oxide
PACS:
X53
DOI:
-
Abstract:
In order to investigate the ability of oxidative degradation of phenol by iron and manganese oxides, oxidative degradations of phenol by inartificial and synthetic iron and manganese oxides were discussed with the opposite experiments. Iron and manganese oxides in soil included inartificial goethite and manganese oxide, while synthetic iron and manganese oxides included synthetic goethite and pyrolusite. The results showed that phenol and iron and manganese oxides reacted with oxidation-reduction, while phenol and impurity in soil reacted with adsorption; the intensity of reduction reaction of iron and manganese oxides decreased rapidly with the increase of pH value of reaction medium; zero-order reaction kinetics equation was used to fit the reductive dissolution reaction of iron oxide, and the relationship between the intensity of reduction reaction of goethite and pH value of reaction medium was nagetive; oxidative degradation of phenol by inartificial goethite was stronger than that of synthetic goethite, the effect of pH value on the intensity of dissolution reaction of inartificial goethite was significant; one-order reaction kinetics equation was used to fit the reductive dissolution reaction of manganese oxide, and the relationship between the intensity of reduction reaction of manganese oxide and pH value of reaction medium was exponential decay; the effect of pH value on dissolution reaction of pyrolusite was stronger than that on manganese oxide in soil, and the effect was significant with the decrease of pH value; the comparison of the effect of reaction of pH value on iron and manganese indicated that manganese oxide still had strong oxidizing capability when the pH value was 6.5.

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Last Update: 2011-06-20