电子束辐射对铜绿微囊藻藻毒素产生和释放的抑制作用研究  

Control and Removal of Microcystin Production of Microcystis aeruginosa by Irradiation of Electron Beam

作　　者：刘书宇[1,2] 吴明红[1] 姜钦鹏[1] 

机构地区：[1]上海大学环境与化学工程学院,上海200444 [2]哈尔滨工业大学市政与环境工程学院,哈尔滨150090

出　　处：《环境科学》2012年第5期1575-1578,共4页Environmental Science

基　　金：国家自然科学基金项目(50809037);上海市重点学科项目(S30109);城市水环境与水资源国家重点实验室开放课题项目(ES201004);国家水体污染控制与治理科技重大专项(2008ZX07421-004)

摘　　要：铜绿微囊藻及其所产生的藻毒素严重威胁人类健康和生命安全,给水处理带来很大困难.利用直线加速器产生的电子束对铜绿微囊藻分别进行1、2、3、4和5 kGy的辐射,通过胞内毒素和胞外毒素的变化,分析了电子束辐射对藻细胞毒素产生和释放过程的影响.结果表明,2～5 kGy的辐射使藻细胞叶绿素a含量迅速大幅下降,对胞外毒素的去除率分别为76.9%、76.2%、76.2%和97.7%,表明电子束辐射对微囊藻毒素的降解作用.胞内毒素、胞外毒素与叶绿素a浓度之间的相关性拟合进一步证实电子束辐射抑制了胞内毒素的产生.Microcystin produced by Microcystis aeruginosa often cause person health and safety and affects drinking water treatment.In this study,electron beam generated by an accelerator was applied to irradiate M.aeruginosa by dose of 1,2,3,4 and 5 kGy.The effect of MC production and releasing process was studied by intracellular and extracelluar MC changing.Data indicated that 2-5 kGy irradiation made Chl-a content decrease fast.And removal rate of extracelluar MC by 2-5 kGy irradiation was 76.9%,76.2%,76.2% and 97.7%,which showed high efficiently MC decomposition by radiation.The correlation between Chl-a with intracellular and extacelluar MC content proved that electron beam radiation controlled intracellular MC production efficiently.

关 键 词：电子束 辐照 藻毒素 抑制 降解 

分 类 号：X52[环境科学与工程—环境工程]