紫外线对铜绿微囊藻的抑制效果及特性研究

采用紫外平行光仪辐照方法,研究紫外线对"水华"蓝藻中常见的铜绿微囊藻生长的抑制效果,并探讨紫外线对藻沉降性能、叶绿素、藻胆蛋白的影响,以及藻生长光照条件对紫外线抑藻效果的影响.结果表明,紫外线对铜绿微囊藻的生长具有显著抑制作用,150 mJ/cm<'2>紫外剂量下,藻细胞个数被控制于初始水平,藻生长受抑制,如增加紫外剂...

Inhibitory Effects of Ultraviolet Irradiation on the Growth of Microcystis aeruginosa

The inhibitory effects of ultraviolet (UV) irradiation on the growth of Microcystis aeruginosa was investigated, using the UV collimated beam apparatus. The experimental results indicated that, UV light had a high inhibitory effect on the growth of Microcystis aeruginosa. With UV dose of 150 mJ/cm², the number of algal cells was controlled at the initial level. Under higher UV dose irradiation, the number of algal cells decreased greatly. Through UV irradiation treatment, sedimentation rate of algae was speeded. Under the UV irradiation of 500 mJ/cm², the sedimentation rate of algae with initial concentration of 4.52×10⁶ cells/mL increased to 14.4% from 1.5% after 2 days incubation. Chlorophyll and phycobilisome were destroyed to a certain extent after UV irradiation. With the UV irradiation of 150 mJ/cm² and 300 mJ/cm², the concentration of chlorophyll decreased to 43.6% and 26.4%, respectively. The characteristic absorption peak of phycobilisome was lowered obviously. After UV irradiation treatment, culturing the algae in the darkness first can maintain the inhibitory effect.