二氧化钛光催化降解十二烷基苯磺酸钠水溶液  

Photocatalytic Degradation of DBS Solution by Using Nano-sised TiO_2 Powder

作　　者：范宇 谢强[2] 田雨[2] 

机构地区：[1]阿坝州工业经济研究所,四川阿坝州623000 [2]四川省环境保护科学研究院,四川成都610041

出　　处：《安徽化工》2017年第5期26-30,共5页Anhui Chemical Industry

摘　　要：十二烷基苯磺酸钠(DBS)是废水中难以处理的一种表面活性剂,传统的处理方法效果不好或费用较高。光催化氧化法具有降解速度快、降解无选择性、氧化反应条件温和、投资少、能耗低、无二次污染等优点,因而用纳米二氧化钛光催化处理DBS废水越来越受到重视。用二氧化钛处理十二烷基苯磺酸钠(DBS)溶液,考查了溶液初始浓度、搅拌和通气、H2O2浓度、溶液p H值等参数对其降解率的影响,并探讨了其光催化动力学方程。研究结果表明,DBS初始浓度小于30mg/L时,其光催化反应遵循Langmuir-Hinshelwood(L-H)动力学模型,表现为一级反应动力学。Sodium dodecylbenzenesulfonate（DBS）is a kind of surfactant which is difficult to be treated in wastewater,thetraditional treatment method is ineffeciency and/or high expense. The attention is paid to photocatalytic oxidation of DBSwastewater by nanosised titanium dioxide because of its effectivity, versatility, mild condition,low cost and non-secondarypollution. In this paper,DBS solution was treated by using nano-scaled TiO2 powder. The initial solution concentration,agitation and aeration,H2O2 concentration,pH value on the degradation rate,and the photocatalytic kinetic equations wereinvestigated. When the initial concentration of DBS was less than 30mg/L,its photocatalytic reaction followed theLangmuir-Hinshelwood kinetic model, and the photocatalytic degradation reaction was first-order.

关 键 词：纳米二氧化钛 光催化降解 十二烷基苯磺酸钠(DBS) 

分 类 号：X703[环境科学与工程—环境工程]