期刊
WATER SCIENCE AND TECHNOLOGY
卷 61, 期 8, 页码 2161-2168出版社
I W A PUBLISHING
DOI: 10.2166/wst.2010.151
关键词
Al-Fe; 4-CP; CWPO; industrial wastewater; pillared clays
资金
- Spanish MEC [CTQ2005-02284, CTQ2008-03988]
- CM-UAM [CCG07-UAM/AMB-1867]
Catalysts based on pillared clays with Al-Fe have been synthesised from a commercial bentonite and tested for catalytic wet peroxide oxidation (CWPO) of aqueous 4-Chlorophenol (4-CP) solution and industrial wastewater from cosmetics manufacture. The effect of the synthesis procedure, the iron load and reaction temperature on the catalytic activity was studied using 4-CP as target compound. A lower temperature in the preparation of the pillaring solution, as well as a higher Fe load, gave rise to a higher catalytic activity, but also a higher leaching of the active phase. The best catalyst, in terms of catalytic activity, was also tested for treating cosmetic wastewater by CWPO. Experiments were carried out at 90 degrees C and atmospheric pressure and the influence of Fe load, catalyst concentration and H(2)O(2)/COD ratio (between 0.5 and 2 times the stoichiometric ratio) were analysed. Higher values of these parameters favour COD reduction. The Fe leaching in all cases was lower than 1.2 mg/L, indicating that these catalysts have a high stability under these experimental conditions.
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