Photo Degradation of Methyl Orange by Persulfate Activated with Zero Valent Iron

[摘要] The oxidative degradation of Methyl Orange (MO) subjected to direct photolysis (Solar) and various oxidative systems was studied. The comparative experiments have shown that MO conversion and mineralization increases in the following order: Solar ∼ Solar/Fe0 ∼ Solar/S2O82- °C, respectively. The rate of MO decomposition and mineralization increased proportionally to the initial concentration of the oxidant at the molar ratios [S2O82-] :[MO] ≤ 12. Judging by the nature of the kinetic curves, a further increase of this ratio is impractical. However, an increase in the oxidant concentration had a positive effect on the degrees of conversion and mineralization of total organic carbon (TOC). Thus, at the ratios of 12:1 and 48:1, the conversion efficiency of TOC was 23 and 60 %, respectively. The optimal concentration of Fe0 was 100 mg/l.

[发布机构] Laboratory of Engineering Ecology, Baikal Institute of Nature Management of the 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] Comparative experiments;Direct photolysis;Initial concentration;Optimal concentration;Oxidant concentrations;Oxidative degradation;Oxidative systems;Total Organic Carbon