铜绿微囊藻臭氧化以及藻毒素去除研究

目的]研究臭氧杀藻机理和藻毒素去除效能,探索富营养化水体藻类处理的可行技术。方法]采用臭氧氧化技术,针对太湖蓝藻中典型的产毒株——铜绿微囊藻(FACHB-912)进行了杀藻、藻毒素去除效果研究。结果]臭氧杀藻能够破坏铜绿微囊藻细胞壁,导致胞内物质流失,很少量的臭氧就能够对藻细胞造成损伤,抑制其正常生长代谢。臭氧氧化可以去除藻毒素(MC-LR、MC-RR),10min去除率,LR为82.25%,RR为74.28%。臭氧去除藻毒素受溶液TOC影响,在同样条件下,对分离纯化后藻毒素的去除率LR为95.68%,RR为86.03%。结论]臭氧化去除铜绿微囊藻效果显著。臭氧对于MC-LR、MC-RR去除效果明显,LR的臭氧降解效率要高于RR。

Study on the Ozonization of Microcystic aeruginosa and the Removal of Its Algae Toxins

Objective] The purpose was to study the algae-killing mechanism and removal capability on algae toxins of ozone and explore the feasible technologies of treating eutrophic water body with algae.Method] The effects of algae-killing and removing algae toxins on Microcystic aeruginosa(FACHB-912) ― the typical toxigenic strain among cyanobacteria in Taihu Lake was studied by ozonization technology.Result] Killing algae with ozone could destroy the cell wall of M.aeruginosa and cause matter in cell to lose.A little ozone could cause damage on algae cell and inhibit its normal growth and metabolism.Ozonization could remove algae toxins(MC-LR and MC-RR),the removal rate was 82.25 % on LR and 74.28 % on RR in 10 min.The removal of algae toxin with ozone was influenced by solution TOC,and under the same condition,the removal rates were 95.68 % and 86.03 % resp.on separated and purified algae toxins LR and RR.Conclusion] The ozonization had notable effect of removing M.aeruginosa.The removal effects of ozone on MC-LR and MC-RR were obvious and the degradation efficiency by ozone on LR was higher than that on RR.