紫外线照射对铜绿微囊藻活性的影响

Effect of UV Irradiation on Microcystic Aeruginosa Activity

以铜绿微囊藻为研究对象,考察了紫外线照射对铜绿微囊藻的灭活效果及光合活性的影响,并研究了经紫外线照射后藻溶液水质的变化情况.结果表明,紫外线对铜绿微囊藻的灭活效果随着紫外线剂量的增大而提高,而光合活性随着紫外线剂量的增加呈指数下降;在藻浓度为35×108个.L-1条件下,91.8mJ.cm-2的紫外线剂量即可对其产生有效的抑制作用,紫外线照射时间10min是抑制藻类生长的最佳时间;藻的浓度对紫外线灭活藻有一定影响,紫外线对高浓度藻灭活效果明显;紫外线照射对藻液的UV254影响较小,但藻液的DOC(溶解性有机碳)随着紫外线剂量的增加呈现先增大后降低的趋势.

A study was made of the effect of ultraviolet rays（UV）irradiation on the inactivation and photosynthetic activity of microcystic aeruginosa,and an investigation was made into the change of water quality in the algae solution.Results show that the inactivating efficiency increases with the increasing of UV fluence,but the photosynthetic activity decreases exponentially with the increasing of UV fluence.Under the algae concentration of 35×108（cell）·L-1,the algae is suppressed effectively at the UV fluence of 91.8 mJ·cm-2.The corresponding optimum irradiation duration is 10 min.The concentration of microcystic aeruginosa determines its inactivation,and the removal efficiency of the algae with high concentration is more obvious.UV radiation is less influential on the UV254 of algae solution.With the increasing of UV radiation intensity,the removal of DOC presents an initial increase and then a decrease.