羟自由基快速灭活压载水中藻类模拟研究  

Simulation of Rapid Inactivation of the Algae in Ballast Water Using Hydroxyl Radical

作　　者：杨宪立[1] 白敏冬[1] 吴彦[1] 丁妍[1] 徐叶飞[1] 

机构地区：[1]大连海事大学环境工程研究所．辽宁大连116026

出　　处：《科技导报》2009年第17期44-46,共3页Science & Technology Review

基　　金：国家科技支撑计划重点项目(2006BAC11B06)

摘　　要：应用强电场电离放电方法产生羟自由基溶液,对基于国际海事组织《控制和管理船舶压载水及沉积物国际公约》第D-2条的羟自由基快速灭活海藻进行了模拟实验研究。结果表明,羟自由基对模拟压载水中初始浓度分别为1.1×104、5.0×104、4.0×104和2.4×104cell/mL的球等鞭金藻、聚球藻、小新月菱形藻以及上述3种海藻混合藻都表现出良好的杀灭效果。在模拟处理压载水系统中,在羟自由基浓度为0.62mg/L条件下,同时在输送管道中接触时间达到6s时,藻类的致死率均达到99.96%以上,24h后检测无活藻再生现象,满足《公约》第D-2条排放标准。同时监测的排放压载水水质情况表明,海水的pH值、盐度、电导率几乎不变;浊度明显下降,总固体悬浮物含量降低85%,化学需氧量降至未检出程度;磷酸盐和无机氮总含量等检测均符合海洋水质标准。The algae in simulated ballast water were rapidly killed by using hydroxyl radical produced by strong electric-field ionization discharge based on the Regulation no. D-2 of IMO ＂International Convention for the Control and Management of Ships＂ Ballast Water and Sediments＂. The experimental results show that the inactivation is very well achieved when the initial concentration of Isochrysis galbana, Synechococcus, Nitzschia closterium and the mixed algae of the three species are 1.1×10^4, 5.0×10^4, 4.0×10^4 and 2.4 ×10^4 cell/mL, respectively. And the death rate of all kinds of algae can reach 99.98% when the concentration of hydroxyl radical solution is 0.62 mg/L in the ballast water simulation treatment 6 s system after contacting time of 6 s in the discharge pipelines. Moreover, the resurrection of treated algae has not been found after 24 hours. And the results agree completely with the Regulation no. D-2, the discharge standards of the Convention. At the same time, the monitoring analysis shows that pH value, salinity, conductivity of the treated seawater are almost unchanged. Turbidity is decreased, while dissolved oxygen is increased. Total suspended solids are decreased to 85%. Chemical oxygen demand is decreased to a point of no detection. The amount of phosphate and the total content of inorganic nitrogen agree with the seawater quality standards also.

关 键 词：羟自由基 压载水 海藻 水质 灭活 

分 类 号：X55[环境科学与工程—环境工程] O46[理学—电子物理学]