摘要
采用准平行光束仪对三角褐指藻等8种海洋微藻进行辐射,研究了UV-C对它们的灭活效果及特点,并确定剂量反应关系。结果表明,紫外线对三角褐指藻、中肋骨条藻、盐生杜氏藻、利玛原甲藻和赤潮异弯藻等5种藻的灭活特点是灭活率随着紫外线剂量的增加而提高,在剂量为400 mJ/cm2时对它们的灭活率可分别达到66.1%、40.6%、88.9%、48.6%和52.5%;紫外线对小新月菱形藻和塔胞藻的灭活特点是在低紫外线剂量下有较好的灭活作用,而剂量大于300 mJ/cm2时灭活作用开始减弱,在剂量为300和400 mJ/cm2时两种藻的灭活率分别为55.3%和27.2%、33.9%和21.1%;而低剂量的紫外线对青岛大扁藻生长有促进作用,剂量大于200 mJ/cm2时促进作用开始减弱。藻细胞个体大小不是影响紫外线灭活效果的原因,藻的种类、藻细胞壁的有无及其成分的不同可能是造成不同灭活效果的原因。
The effect and the dose-response relationship of UV-C irradiation on eight marine microalgae species was studied using the collimated light beam apparatus.The results showed that the inactivation rate increased with UV-C dose for Phaeodactylum tricornutum,Skeletonema costatum,Dunaliella saline,Prorocentrum lima and Heterosigma akashiwo,the inactivation rate were 66.1%,40.6%,88.9%,48.6% and 52.5% respectively with the dose of 400 mJ/cm2.UV-C was effective for Nitzschia clostertum and Tetraselmis sp.Inactivation at low dose and the inactivate rate began to decrease when the UV-C dose was more than 300 mJ/cm2.When UV-C dose was 300 and 400 mJ/cm2,the inactivation rate were 55.3% and 27.2%,33.9% and 21.1% respectively for two algas.UV-C could stimulate the growth of Tetraselmisgelgolandica var.tsingtaonesis at low UV-C dose,algal cell numbers started to decrease when the dose increased to 200 mJ/cm2.The algal species,the existence and inexistence of the algal cell wall,and the difference components of algal wall might be the main factors influencing on the inactivation efficiencies of UV-C instead of algal cell size.
出处
《海洋环境科学》
CAS
CSCD
北大核心
2013年第2期171-174,共4页
Marine Environmental Science
基金
"十一五"国家科技支撑计划重点项目(2006BAC11B05)
关键词
紫外线
辐射
剂量
海洋微藻
灭活效果
Ultraviolet
irradiate
dose
marine microalgae
inactivation efficiency
