摘要：

对臭氧的杀藻效能以及杀藻后水样的致突变性进行了系统研究，结果表明：当要求的叶绿素去除率较低时，投加低浓度O₃化气体臭氧需要量少。一定浓度的O₃化气体，在叶绿素达到一定去除率后，增加O₃投加量，叶绿素增加幅度不大；O₃杀藻后不会使水样中有机浓集物的致突变性增加；藻体细胞的细胞壁结构与藻类的杀灭有很大关系。蓝藻等类似于细菌的藻类容易被杀灭，而细胞壁结构比较坚固的藻类如绿藻、硅藻则不容易被杀灭。

关键词: 臭氧, 叶绿素, 去除率, 致突变性

Abstract:

The effectiveness of algae-killing and the mutagenicity of the treated water by ozone have been studied. The results show that: If the removal rate of chloraphyll (a) Chla) is controlled to be low (no more than 60%), the O₃ dose of low concentration is less than that of high concentration. When the rate arrives at a certain level in one O₃ concentration, its increase range is small while increasing the dose of O₃; The mutagenicity of organic extracts in the treated water could not be increased after algae-killing by O₃; The structure of algae cell wall is related to the algae-killing by O₃. Cyanophyta, which is analogous to bacterium is ease to be killed, while to such algae as Chlorophyta, Bacallaraophyta, whose cell wall is solid, it is hard to be killed.

Key words: ozone, chloraphyll(a), removal rate, mutagenicity

中图分类号: 

• TU991.25