Catalytic Properties of Fe-containing Layered Aluminosilicates in Photo-oxidation of Dye "Methyl Green"

[摘要] The iron-containing materials with an iron content of 40 mg/g and 52.5 mg/g, a specific surface area of 107 m2/g and 96 m2/g are developed on the basis of natural layered aluminosilicate (montmorillonite) and polyhydroxo complexes of iron. It is shown that the materials exhibit high catalytic activity in the photo-oxidation of dye "Methyl Green". The influence of physicochemical parameters (loading of the catalyst, a ratio of initial concentrations [H2O2]/[MG] on the efficiency of the dye photo-oxidation was established. The optimum conditions, which made it possible to achieve high mineralization and 100 % the dye oxidation efficiency were determined: the catalyst loading equal to 1.0 g/l and the ratio of [H2O2] and [MG] equal to stoichiometric ratio (55 mol/mol). The decrease of the total organic carbon content after photo-oxidation reaction was 56.5%. The average value of the quantum yield of the dye photo-oxidation was to 0.30 mol/Einstein. The results of the conducted research show that the developed iron-containing materials are the promising catalysts for photo-Fenton processes of oxidative degradation of organic compounds. The materials are of interest for use in wastewater treatment processes from toxic organic pollutants.

[发布机构] Laboratory of Engineering Ecology, Baikal Institute of Nature Management of Siberian Branch, Russian Academy of Sciences, Sakhyanovoy St. 6, Ulan-Ude; 670047, Russia^1;Department of Inorganic and Organic Chemistry, Buryat State University, 24 (a), Smolina St., Ulan-Ude; 670000, Russia^2

[学科分类] 土木及结构工程学

[关键词] Catalytic properties;Initial concentration;Iron-containing materials;Oxidative degradation;Photo-Fenton process;Physicochemical parameters;Total organic carbon content;Wastewater treatment process