您的位置:首页  > 论文页面

光催化-错流微滤处理典型内分泌干扰物的研究

发表时间:2011-12-31  浏览量:1635  下载量:650
全部作者: 李思,麦家星,孙卫玲,倪晋仁
作者单位: 北京大学深圳研究生院环境与能源学院,城市人居环境科学与技术重点实验室;北京大学环境科学与工程学院,水沙科学教育部重点实验室
摘 要: 采用错流微滤系统结合柱状悬浮光催化反应器,研究不同操作条件和溶液化学条件下膜通量的变化,在优化的操作条件下反应器连续运行处理含有17β-雌二醇(E2)、17α-乙炔基雌二醇(EE2)、双酚A(BPA)等内分泌干扰物(endocrine disrupting chemicals, EDCs)的模拟废水。结果表明:TiO2投加量为0.2 g/L,pH值为7.0,操作压力为0.05 MPa,错流速度(cross flow velocit, CFV)为0.3 m/s时,光催化的效果最好,且实现最大膜通量。外加无机离子能提高膜通量,而外加腐殖酸增加了膜吸附阻力和滤饼层阻力,从而显著降低膜通量。光催化反应进行到120 min时,E2,EE2和BPA的去除率分别达到83.3%,91.2%和94.0%,并且能够实现催化剂TiO2的有效截留,光催化-错流微滤耦合技术在处理含EDCs的废水方面有很好的应用前景。
关 键 词: 环境工程;光催化;微滤;内分泌干扰物;膜通量;膜阻力
Title: Study on degradation of selected endocrine disrupting chemicals in a photocatalytic crossflow microfiltration membrane reactor
Author: LI Si, MAI Jiaxing, SUN Weiling, NI Jinren
Organization: Key Laboratory for Urban Habitat Environmental Science and Technology, School of Environment and Energy, Shenzhen Graduate School, Peking University; College of Environmental Sciences and Engineering, Peking University, Key Laboratory of Water and Sediment Sciences, Ministry of Education
Abstract: Crossflow microfiltration was combined with the photocatalytic reactor to carry out the fundamental research for practical removal of endocrine disrupting chemicals (EDCs) in water. 17β-estradiol (E2), 17α-ethinylestradiol (EE2) and bisphenol A (BPA) were selected as target compounds. The permeate flux at different operating and solution conditions was studied for continuous treatment. The optimized conditions were obtained when the transmembrane pressure was about 0.05 MPa; pH was about 7.0; the cross flow velocity (CFV) was about 0.30 m/s and the concentration of TiO2 was about 0.2 g/L. In this case, the photocatalytic reactor could perform the best, together with maximum permeate flux. Added inorganic ions in the solution increased the permeate flux while the humic acid decreased the permeate flux by increasing the membrane fouling. The removal rates of E2, EE2 and BPA were 83.3%, 91.2% and 94.0%, respectively. It also turned out that the combined reactor could successfully intercept the suspended TiO2. So the photocatalytic membrane process has a good potential in removing EDCs.
Key words: environmental engineering; photocatalysis; microfiltration; endocrine disrupting chemicals; permeate flux; transmembrane pressure
发表期数: 2011年12月第24期
引用格式: 李思,麦家星,孙卫玲,等. 光催化-错流微滤处理典型内分泌干扰物的研究[J]. 中国科技论文在线精品论文,2011,4(24):2209-2216.
 
0 评论数 0
暂无评论
友情链接