Treatment of cyanotoxins and contaminants of emerging concern in water by advanced oxidation processes

摘要：

　　This proceeding introduces three advanced oxidation processes:TiO2 photocatalysis,UV/H2O2,and UV/persulfate anion (S2O82-),which can be used to decompose cyanotoxins as well as other contaminants of emerging concern in water.Both heterogeneous and homogeneous treatment systems are considered.For heterogeneous systems,two main approaches for TiO2 photocatalysis are discussed:the extension of the light absorption edge of TiO2 toward the visible light region to enhance the harvesting of solar energy during TiO2 photocatalysis and the improvement of structural properties of TiO2 to enhance the efficacy of photocatalytic activity of TiO2.In addition,the photocatalytic activity of TiO2 is evaluated for the degradation of the cyanotoxin microcystin-LR and oxytetracycline,an antibiotic.For homogeneous systems,photochemical technologies,UV/H2O2 and UV/S2O82-,are discussed as advanced oxidation processes for decomposing thyroid-disrupting chemicals in water and wastewater.In those cases,thyroxine (3,3,5,5-tetraiodo-1-thyronine) and β-lactam antibiotics are used as model compounds.UV/S2O82-demonstrates higher degradation of these compounds than UV/H2O2 due to the higher quantum yield of SO4·-under UV-254 nm irradiation of S2O82-.

关键词： emerging contaminants photocatalyst TiO2 UV/H2O2 UV/S2O82-

作者: Changseok Han Xiaodi Duan Joel Andersen Dionysios D.Dionysiou

作者单位: Environmental Engineering and Science Program, School of Energy, Environmental, Biological and Medic Environmental Engineering and Science Program, School of Energy, Environmental, Biological and Medic

会议类型: 国际会议

会议名称: 2013 International Symposium on Environmental Science and Technology(2013环境科学与技术国际会议)

会议地点: 大连

会议语种:英文

页码: 332-337

在线出版日期: 2013-06-04（万方平台首次上网日期，不代表论文的发表时间）