文章基本信息

标题：The Comparative Assessment of Photolysis, Sorption and Photocatalysis Processes to Humic Acids Removal from Water
本地全文：下载
作者：D. Sonea ; R. Pode ; F. Manea 等
期刊名称：Universitatea Politehnica din Timisoara. Buletinul Stiintific. Seria Chimie si Ingineria Mediului
印刷版ISSN：1224-6018
出版年度：2010
卷号：55(69)
期号：02
出版社：Universitatea Politehnica din Timisoara
摘要：Taking into account the photosensitive character of humic acids and the sorption as prerequisite step to reach an effective degradation by photocatalysis application for removal of humic acids from water, the assessment of photolysis and adsorption contribution to overall photocalysis process using TiO₂-modified zeolite catalyst with 1% TiO₂, w/w (TiO₂-Z) is necessary. The results obtained at low concentration of humic acid (25 mg·L^-1) using TiO₂-Z, indicated that in comparison with adsorption process, the photocatalysis application did not improve removed amount of humic acid. Though, the functionalization of zeolite with TiO₂ led to improve the adsorption capacity for humic acid. The best results were achieved for photolysis due to fact that humic acids act as natural photosensitizers. At higher concentrations of humic acids (100 mg·L^-1), better results were achieved on TiO₂-Z for photocatalytic process (41.8 mg) than the sorption (28.7 mg) and photolysis (27.3 mg) processes, but no a cumulative effect of sorption and photolysis was noticed. The similar results obtained through application of photocatalysis using both TiO₂-Z and Z-Na catalysts and taking into account the photoinert character of Z-Na and enhanced sorption capacity of TiO₂-Z for HA proved the significant contribution of both photolysis and sorption processes.
关键词：photolysis, photocatalysis, sorption, TiO₂-zeolite, humic acid