UV/Fenton/TiO_2光催化氧化降解微囊藻毒素的研究  

Study on the Photocatalytic Degradation of Microcystins by Using UV/Fenton/TiO_2

作　　者：张维 董泽琴 张琳 杨再荣 

机构地区：[1]贵州省水污染控制与资源化技术研究重点实验室,贵州贵阳550002 [2]贵州省环境科学研究设计院,贵州贵阳550002

出　　处：《安徽农业科学》2010年第9期4775-4778,共4页Journal of Anhui Agricultural Sciences

基　　金：贵州省社会发展科技攻关项目(黔科合S字[2007]1007号);贵州省优秀科技教育人才省长专项资金项目(黔省专合字[2007]108号);贵州省高层次人才科研条件特助经费项目(TZJF-2007-15)

摘　　要：[目的]研究UV/Fenton/TiO2光催化氧化降解供水水源深水湖库水体中微囊藻毒素MC-RR和MC-LR的效果。[方法]以Fen-ton-TiO2作为光催化剂,考察不同反应时间、初始pH值、H2O2浓度、Fe2+浓度、TiO2投加量、光照强度、藻毒素起始浓度对UV/TiO2/Fen-ton多相光催化氧化降解微囊藻毒素的影响,并对多相光催化氧化与UV光分解对藻毒素的去除效果进行比较。[结果]在H2O2起始浓度为0.1mmol/L、[H2O2]/[FeSO4]为15∶1、pH值为4.0、反应液距UV灯管1cm、TiO2投加量为0.05g/L和反应温度为(16±2)℃的条件下,反应3min后,浓度为0.35mg/L的MC-RR和浓度为0.29mg/L的MC-LR去除率可分别达到91.5%和90.2%。[结论]UV/Fen-ton/TiO2光催化氧化法能高效降解微囊藻毒素。[Objective] The paper aimed to study on the effects of MC-RR and MC-LR of photocatalytic degradation of Microcystins by using UV/Fenton/TiO2 in depth lake water. [Method ] Fenton-TiO2 as a photocatalyst,the influence of different reaction time,initial pH value,H2O2 concentration,Fe2＋ concentration,TiO2 dosage,light intensity,initial concentration of Microcystin on UV/Fenton/TiO2 heterogeneous photocatalytic degradation of Microcystin were explored,and comparison of removal effects between heterogeneous photocatalytic degradation and UV photolysis to Microcystin. [Result] Under the conditions that the initial concentration of H2O2 was 0.1 mmol/L,[H2O2]/[FeSO4] was 15∶1,pH value was 4.0,the distance between the reaction solution and UV lamp tube was 1 cm,TiO2 dosage was 0.05 g/L,reaction temperature was （16±2） ℃,and after 3 minutes reacting,the removal rate of MC-RR with 0.35 mg/L concentration and MC-RR with 0.35 mg/L concentration can be reached 91.5% and 90.2% respectively. [Conclusion] UV/Fenton/TiO2 photocatalytic oxidation was proved to be effective degradating Microcystins.

关 键 词：UV/Fenton/TiO2 光催化氧化 微囊藻毒素 

分 类 号：X703.1[环境科学与工程—环境工程]