藻源性内毒素在铜绿微囊藻灭活过程中的释放

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Abstract NaClO, H₂O₂, CuSO₄ and diuron are four commonly used chemical algaecides at present. All of them can inactivate algaes and control algae blooms based on different mechanisms. However, algae-derived endotoxins can be released during inactivation of Microcystis aeruginosa. The effects of these algaecides on the release of endotoxins were evaluated and compared, and the following results were obtained:Endotoxins of 1564.78, 872.14, and 852.03 EU/mL were released after inactivation of algae by 0.10~0.50mg/L NaClO, while 732.23, 1706.22, and 944.84 EU/mL endotoxins were detected when treated by 0.10~0.50mmol/L H₂O₂. When the algae was inactivated by 0.5~2.5μmol/L CuSO₄, 854.60, 1055.45, and 1513.15EU/mL endotoxins were found in water. Endotoxins of 1802.23, 1788.11, and 1886.14 EU/mL were released when 5~25μmol/L diuron was used for inactivation of algae. Algaecides with oxidizing ability can degrade part of endotoxins in solution, while algaecides without oxidizing ability cannot control and degrade the releasing endotoxins efficiently. However, the concentrations of endotoxins under all aforementioned conditions were far greater than that produced via normal metabolism (113.86EU/mL). Therefore, even though the algae in algae-laden water were controlled, it is also necessary to avoid the direct contact with the water to reduce the exposure of endotoxins.

Key words： algae-derived endotoxins sodium hypochlorite hydrogen peroxide copper sulfate diuron

Received: 13 April 2017

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	Articles by authors
	BU Ling-jun
	ZHOU Shi-qing
	SHI Zhou
	WANG Tao
	YI Qi-hang
	SUN Ju-long

Cite this article:

BU Ling-jun,ZHOU Shi-qing,SHI Zhou等. Release of algae-derived endotoxins during inactivation of Microcystis aeruginosa[J]. CHINA ENVIRONMENTAL SCIENCECE, 2017, 37(12): 4675-4680.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2017/V37/I12/4675

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