UV-C光催化纳米TiO_2对蓝藻生长影响的研究  

Study on the Influence of Cyanobacterial Growth by UV-C Photocatalytic Oxidation with Nanometric TiO_2

作　　者：廖兴盛[1] 汪星[1] 赵开弘[1] 周明[1] 

机构地区：[1]华中科技大学环境科学与工程学院,武汉430074

出　　处：《武汉植物学研究》2007年第5期457-461,共5页Journal of Wuhan Botanical Research

基　　金：教育部新世纪优秀人才支持计划项目(NCET-04-0717);国家自然科学基金资助项目(30540070)

摘　　要：研究了UV-C光催化纳米TiO2对蓝藻生长的影响。从生理上分析了UV-C光催化纳米TiO2具有促进蓝藻中鱼腥藻7120体内活泼态氧化物O2,.OH和H2O2的产生,抑制藻体中过氧化氢酶(CAT)、过氧化物酶(POD)、抗坏血酸过氧化物酶(APX)和超氧歧化酶(SOD)在内的抗氧化酶活性,降低可溶性蛋白(Soluble Pr)、藻蓝蛋白(C-PC)、叶绿素a(C-Chl a)和类胡萝卜素(C-Carotenoids)含量,最终表现为藻细胞生长代谢中光合速率和呼吸速率迅速降低,细胞增殖中遗传物质核酸含量下降,并出现几乎达到100%的细胞致死率;同时,通过显微镜观察发现,受试蓝藻细胞形态结构发生了明显变化。可以看出,UV-C光催化纳米TiO2能够有效抑制蓝藻生长。The effects of cyanobacterial growth by UV-C photocatalytic oxidation with nanometric TiO2 were studied.Analyzed from the physiological view point of Anabaena sp.PCC 7120,under UV-C photocatalytic oxidation with nanometric TiO2,as indicated by increased the contents of reactive oxygen species of the O2,·OH and H2O2,decreased the capacity of antioxidant system of the CAT,POD,APX and SOD,and decreased the contents of the soluble protein,C-PC,C-Chl a and C-Carotenoids.Furthermore,the results compared with those without photocatalytic,as indicated by reduced photosynthetic rate and photorespiration rate rapidly,decreased nucleic acid contents as for cell proliferation,and gained about 100% mortality.Observed under the light microscopy cell morphology was changed obviously.So UV-C photocatalytic oxidation with nanometric TiO2 could achieve a good effect in photocatalytic restraint cyanobacteria.

关 键 词：纳米TIO2 鱼腥藻7120 代谢活性 抗氧化酶 

分 类 号：Q945[生物学—植物学]