H_2O_2与UV-C灭藻的协同效果研究及工程实验  

Engineering Experiment and Investigation of Effect on Degradation of Cyanobacteria by the Combination of UV-C and H_2O_2

作　　者：景江[1] 周明[1] 汪星[1] 赵开弘[1] 

机构地区：[1]华中科技大学环境科学与工程学院,湖北武汉430074

出　　处：《环境科学研究》2006年第6期59-63,共5页Research of Environmental Sciences

基　　金：国家自然科学基金资助项目(30270326);教育部新世纪优秀人才支持计划(NCET-04-0717)

摘　　要：研究了UV-C/H2O2催化氧化去除鱼腥藻PCC7120的效果,探讨了各种因素如c(H2O2),pH,辐照度及反应时间对灭藻率的影响.结果表明,H2O2对UV-C(紫外线C波段辐照)灭藻具有协同作用,UV-C/H2O2高级氧化体系对鱼腥藻PCC7120具有很强的氧化能力.在藻液中c(H2O2)为1 mmol/L,反应温度为25℃,pH为6.8,紫外线辐照度0.54 mW/cm2及反应20 min的条件下,受试藻种的灭活率5 d后可以达到85%以上.将H2O2与浸没式UV-C流动除藻装置结合进行流动式的灭藻实验,灭藻效果显著,鱼腥藻PCC7120体内的SOD酶和POD酶的活性及C-PC藻蓝蛋白、叶绿素a的含量都有大幅度的下降,且灭活后的蓝藻不会重新生长.The degradation effect of cyanobacteria by the combination of UV-C and H2O2 was studied. Anabaena sp. PCC7120 was chosen for experiment. The likely influencing factors, such as H2O2 dosage, pH, UV light intensities, and the reaction time on the degradation of Anabaena sp. PCC7120 were investigated. The result showed that UV-C and H2O2 have intensive oxidation ability to Anabaena sp. PCC7120. After 5 days, the elimination rate of Anabaena sp. PCC7120 was to reach 85% under the experimental conditions of H2O2 dosage 1 mmol/L, reaction temperature 25℃ , pH 6.8, UV light intensity 0.54 mW/cm^2 and reaction time 20 minutes. UV-C technology and H2O2 were combined and used to an analog experiment for degradation of cyanobacteria in the condition of flowing. The degradation of cyanobacteria is obvious. The activity of SOD and POD in Anabaena sp. PCC7120 decreased greatly, and C-PC and Chl a were almost be degraded.

关 键 词：UV—C/H2O2高级氧化体系 鱼腥藻PCC7120 SOD酶 POD酶 叶绿素A 

分 类 号：X703.1[环境科学与工程—环境工程]