作　　者： ; ; ;

机构地区： 东华大学环境科学与工程学院

出　　处： 《台湾海峡》 2011年第1期36-42,共7页

摘　　要： 研究了条纹小环藻(Cyclotella striata)对Cu2+和Zn2+的耐受力、吸附率和吸附量的作用规律.结果表明:Cu2+和Zn2+对条纹小环藻的生长影响显著(p<0.05),随着Cu2+、Zn2+含量的升高,其对条纹小环藻生长的抑制作用增大;当Cu2+和Zn2+的含量分别高于4.00×10-3、0.01 mg/dm3时,其对条纹小环藻的生长几乎没有影响;Cu2+和Zn2+对条纹小环藻生长的半抑制含量分别为0.26、11.17 mg/dm3.Cu2+含量为1.00 mg/dm3和Zn2+含量为50.00 mg/dm3的组合,对条纹小环藻生长的抑制率达72.28%,Cu2+对条纹小环藻的毒性大于Zn2+.条纹小环藻对Cu2+、Zn2+吸附效果良好,当藻细胞含量为2.45×107cells/dm3时,对Cu2+的吸附率为63.00%;当藻细胞含量为1.75×107cells/dm3时,对Zn2+的吸附率为60.52%;条纹小环藻对Cu2+和Zn2+的吸附量分别为9.26 mg/g(21.30×10-9mg/cell)和20.06 mg/g(46.15×10-9mg/cell)时,Cu2+和Zn2+对条纹小环藻不会产生明显毒性. The effects of tolerance,absorption rate and absorption quantity of Cu2＋ and Zn2＋ by Cyclotella striata were studied.The results showed that Zn2＋ and Cu2＋ have significant effects on the growth of Cyclotella striata（p0.05）.Specifically,the growth of the algae increased in response to increasing concentrations of Cu2＋ and Zn2＋.However,low concentrations of Cu2＋（4.00×10-3 mg/dm3） and Zn2＋（0.01 mg/dm3） had little effect on the growth of Cyclotella striata.The EC50 of Cu2＋ and Zn2＋ were 0.26 mg/dm3 and 11.17 mg/dm3,respectively.The combination of Cu2＋ and Zn2＋ produced the highest inhibition（72.28%） when 1.00 mg/dm3 of Cu2＋ and 50.00 mg/dm3 of Zn2＋ were added to the culture medium.The Cu2＋ was more toxic than Zn2＋.The absorption rate for Cu2＋ was 63.00% when the cell abundance was 2.45×107cells/dm3,while the absorption rate for Zn2＋ was 60.52% when the cell abundance was 1.75×107cells/dm3;these rates are equivalent to 9.26 mg/g（21.30×10-9mg/cell） and 20.06 mg/g（46.15×10-9mg/cell）,respectively.No toxic effects were observed at these absorption rates.

关 键 词： 海洋生物学 条纹小环藻 耐受力 吸附率 抑制率 吸附量 毒性

领　　域： [天文地球] [天文地球]