玻璃纤维基Fe(Ⅲ)-TiO_2薄膜在可见光照射下去除球形棕囊藻的效果  

Removing Phaeocystis globosa scherffel by fiberglass-Fe(Ⅲ)-TiO_2 thin film under visible light

作　　者：黄凤[1] 尹平河[1] 赵玲[1] 

机构地区：[1]暨南大学生命科学技术学院,广东广州510632

出　　处：《生态环境学报》2009年第2期466-470,共5页Ecology and Environmental Sciences

基　　金：广东省自然科学基金重点研究项目(04105835);国家自然科学基金项目(40673062);广东省教育厅学科建设重点项目

摘　　要：探讨了以玻璃纤维为基体的纳米Fe(Ⅲ)-TiO2薄膜在可见光照射条件下对球形棕囊藻(Phaeocystis globosa Scherffel)的去除作用。薄膜用溶胶-凝胶法制备,投放入模拟赤潮浓度的棕囊藻培养液中进行除藻实验。实验重点探讨了Fe(Ⅲ)的掺入、基体材料和光照条件对除藻效果的影响。实验结果显示,无光照条件下的Fe(Ⅲ)-TiO2薄膜对藻无去除效果,在可见光照射下Fe(Ⅲ)-TiO2薄膜的除藻效果好于TiO2薄膜;以玻璃纤维为基体的Fe(Ⅲ)-TiO2薄膜除藻效果好于以玻片为基体的薄膜和粉末。在藻液中投加5.0mg·L-1的以玻璃纤维为基体的Fe(Ⅲ)-TiO2薄膜,光照36h后,藻液中细胞密度由6.48×106·mL-1降低到0.01×104·mL-1,叶绿素a质量浓度由6.66mg·L-1降低到0.001mg·L-1,除藻率达到99.9%,除藻过程符合准一级反应动力学方程。研究表明,玻璃纤维基Fe(Ⅲ)-TiO2薄膜在可见光照下可以有效去除棕囊藻,在赤潮治理方面有较好的应用前景。A research on removing Phaeocystis globosa Scherffel by Fiberglass-Fe（Ⅲ）-TiO2 thin film under visible light was made. First Fiberglass-Fe（Ⅲ）-TiO2 thin film was prepared by Sol-gel method. Then the films were employed as photocatalytic surfacing agents to inhibit the growth of algae. Influencing factor such as Fe（III）, base material and light was investigated. Results shown that Fiberglass-Fe（Ⅲ）-TiO2 thin film performed better at the presence of visible light than without light. Film based on the fiberglass has a better performance than based on the glass. By use of 5.0 mg·L^-1 Fg-Fe（Ⅲ）-TiO2 for 36 h visible light treating, the algal density reduced to 0.01 ×10^4 cell.mL^-1 from 6.48×10^6 cell.mLl, the mass concentration of chl-a reduced to 0.001 mg·L^-1 from 6.66 mg·L^-1, more than 99.9% cells were removed. The dynamics of algal removal follows the pseudo-first-order kinetics model. Results indicate that Fiberglass-Fe（Ⅲ）-TiO2 thin film is able to remove Phaeocystis globosa Scherffel and considered as a potential method to control the red tide.

关 键 词：赤潮 球型棕囊藻 Fe(Ⅲ)-TiO2玻璃纤维 可见光 

分 类 号：X52[环境科学与工程—环境工程]