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随着全球蓝藻水华的频繁暴发及藻毒素引发的生态安全问题，寻求高效、绿色的藻类污染控制技术成为环境领域的研究热点。本文以铜绿微囊藻为研究对象，研究光照耦合机械搅拌对铜绿微囊藻的生长及产毒情况作用机制。结果显示，光照、机械搅拌、光照耦合机械搅拌三种处理下，铜绿微囊藻的生长均受到不同程度的抑制，以光照耦合机械搅拌处理组对微囊藻生长抑制作用最大，表现为叶绿素a和藻密度相对于空白组分别降低了64.7%和97.4%。此外，光照耦合机械搅拌处理组对铜绿微囊藻的细胞内外微囊藻毒素去除率分别达到了92.6%和50.4%，显著高于其他两个处理组。光照耦合机械搅拌极大促进过氧化氢(H_2O2)的生成，使得H_2O2浓度上升483%，相关性分析表明，水体H_2O2浓度与铜绿微囊藻细胞密度、比生长率以及叶绿素a呈显著负相关性(P<0.05)，与胞外微囊藻毒素浓度呈极显著负相关性(P<0.01)。光照耦合机械搅拌可能从物理破坏、化学氧化以及生理失活三个方面抑制藻细胞的生长和产毒，从而达到除藻和降低水体微囊藻毒素的目的。研究结果为水体富营养化治理提供了新的思路。
Abstract：In view of the recurrent occurrence of global cyanobacterial blooms and the ecological safty concerns engendered by algal toxins, the research for efficient and environmentally fricndly tcchnologics to control algal pollution has emerged as a pivotal research hotspot in the environmental sciences. In this paper, we investigated the action mechanism of action of light-coupled mechanical agitation on the growth and toxic substance production of Microcystis aeruginosa. The results show that the growth of Microcystis aeruginosa is inhibited by light, mechanical agitation and light-coupled mechanical agitation, with the most by the lightcoupled mechanical agitation group, which shows that chlorophyll a and alga cell density decreased by 64.7 % and 97.4 % respectively,compared with the control group. In addition, the removal rates of extracellular and intracellular microcystins in the light-coupled mechanical agitation treatment group are 92.6 % and 50.4 % respectively, significantly higher than those of the other two treatment groups. Light-coupled mechanical agitation significantly enhances the production of H_2O2, resulting in a substantial increase of483% in the H_2O2 concentration. Correlation analyses demonstrate a significant negative correlation(P<0.05) between the H_2O2 concentration and the density of algal cells, the specific growth rate, and chlorophyll a. Additionally, a highly significant negative correlation(P<0.01) is observed between the H_2O2 concentration and the concentration of extracellular phycotoxins. Mechanical agitation coupled with light may inhibit the growth and toxin production of algal cells by physical destruction, chemical oxidation and physiological inactivation, thus achieving the purpose of algal removal and reduction of algal toxins in the water body. The results of the study provide new ideas for the management of eutrophication in water bodies.
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基本信息:
DOI：10.19478/j.cnki.2096-2347.2026.01.07
中图分类号:X173;X52
引用信息:
[1]李佳琦,谢平,陈悦悦,等.光照耦合机械搅拌对铜绿微囊藻生长及产毒的影响[J].三峡生态环境监测,2026,11(01):57-65.DOI:10.19478/j.cnki.2096-2347.2026.01.07.
基金信息:
国家自然科学基金青年基金项目(42107441,42177397,22136003)
2025-05-16
2025-05-16
2025-05-16