羟基自由基快速致死水华针杆藻的研究  

Effect of hydroxyl radicals on the removal of Synedra sp. in water blooms

作　　者：李芳[1] 白敏冬[1] 洪伟辰 郑琦琳 丁丽飞 张芝涛[2] 

机构地区：[1]厦门大学环境与生态学院海洋生物资源开发利用协同创新中心,厦门361102 [2]大连海事大学环境工程研究所,大连116026

出　　处：《环境科学学报》2016年第2期550-556,共7页Acta Scientiae Circumstantiae

基　　金：国家科技支撑计划(No.2013BAC06B01;2013BAC06B02);国家重大科研仪器研制项目(No.61427804);国家高技术研究发展计划(No.2012AA062609);国家杰出青年科学基金(No.61025001)~~

摘　　要：库区、河流富营养化加剧,水华频繁爆发形成的高藻水已严重威胁饮用水的安全.本文利用大气压强电离放电高效生成的氧活性粒子(OASs),通过高压射流器将其注入到处理高藻水的主管路中,生成羟基自由基(·OH),同时·OH对引起水华的针杆藻(Synedra sp.)进行杀灭.采用荧光染色、测定光合能力等生物学方法,确定·OH致死针杆藻的阈值浓度及致死时间.结果显示,当初始藻细胞密度为10×104、50×104和100×104cells·m L-1,致死阈值浓度分别为0.25、0.71和1.18 mg·L-1,而最大光量子产率Fv/Fm的值在1 s内由0.50迅速减小为不能检出,表明可在运输高藻水的管路中完成·OH的处理过程.本研究表明,·OH快速致死的方法可高效地处理高藻水.Recently,an excessive amount of algae in water blooms have seriously threatened public health and the supply of drinking water. In this paper,the dominant species Synedra sp. in algae-laden water was inactivated using hydroxyl radicals generated from a strong ionization discharge and highpressure water jet cavitation. With this water system,the inactivation concentrations were 0. 25,0. 71 and 1. 18 mg·L- 1determined by the biological methods of fluorescence staining and the photosynthetic capacity when the initial algae densities were 10 × 104,50 × 104和 100 × 104cells·m L- 1. In addition,the maximum photo quantum yield（ Fv/ Fm） decreased from 0. 50 to ND（ not detected） within 1 s. Therefore the ·OH treatment could be carried out in the process of conveying algae-laden water. This suggested that ·OH could treat the algae-laden water effectively.

关 键 词：羟基自由基 针杆藻 致死阈值 致死时间 

分 类 号：X703[环境科学与工程—环境工程]