过氧化物基化合物对Microcystis aeruginosa的生长和毒性的影响
Miquel Lürling1, Ziwei Liao1, Li Kang1
1Aquatic Ecology & Water Quality Management Group, Department of Environmental Sciences, Wageningen University, P.O. Box 47, 6700 AA, Wageningen, the Netherlands.
Harmful algae
|September 11, 2025
概括
新的过氧化配方有效控制蓝藻细菌的繁殖,包括微囊. 虽然大多数产品降低了叶绿素a,但OximycinTM P5,Phycomycin® SCP和液态H2O2在较低剂量下显示出对水质管理的承诺.
科学领域:
- 环境科学 环境科学
- 水生生态学 水生生态学
- 水处理 处理水的方法
背景情况:
- 蓝藻细菌的繁殖对水体和生态系统服务构成全球威胁.
- 过氧化 (H2O2) 是一种潜在的治疗方法,但其快速分解限制了疗效.
- 新的液体和固体H2O2配方旨在提高稳定性和有效性.
研究的目的:
- 评估三种新的H2O2配方 (OximycinTM P5,Phycomycin® SCP,Lake Guard® Oxy) 和传统的过氧化物 (H2O2,CaO2) 对微囊气球菌的开花的疗效.
- 评估这些处理对受影响水域微囊动态的影响.
主要方法:
- 在不同初始开花度下对M. aeruginosa进行五种过氧化物产品的比较测试 (Chl-a:150μg L-1和600μg L-1).
- 使用3毫克H2O2 L-1和10毫克H2O2 L-1的剂量反应评估1.1.
- 在9天内监测Chl-a度和细胞外微囊素水平.
主要成果:
- 所有测试的产品都有效控制了M. aeruginosa生物量,降低了Chl-a水平.
- 在较低的开花度下,CaO2的效果低于其他产品.
- 在更高的开花度和更低的剂量 (3毫克H2O2L-1),OximycinTM P5,Phycomycin® SCP和液体H2O2比Lake Guard®氧和CaO2更有效.
- 在最高剂量 (10 mg H2O2 L-1) 时,所有产品都显示出高效率,但没有恢复开花.
- 细胞外微囊素最初增加,但在第九天显著下降,表明降解.
结论:
- 新的H2O2配方和传统的过氧化物可以有效地管理Microcystis aeruginosa的开花.
- 产品选择可能取决于开花强度和所需剂量,一些配方在较低度下表现更好.
- 微囊的降解随着时间的推移而发生,这表明这些处理对改善水质的双重好处.
相关概念视频
01:29Oxygen Requirements and Growth Patterns
1.1K
Microorganisms exhibit diverse oxygen requirements and growth patterns driven by their metabolic strategies and environmental adaptations. Oxygen, while essential for many organisms, can also be toxic under certain conditions, shaping how microorganisms grow and survive.Oxygen Requirements of MicroorganismsMicroorganisms are classified based on their ability to use or tolerate oxygen:● Obligate aerobes like Mycobacterium tuberculosis need oxygen for energy production, as it serves as the...
1.1K
01:27Chemical Agents for Microbial Control
699
Chemicals play important roles in controlling microbial growth by targeting microbial structures and functions as sanitizers, antiseptics, disinfectants, and sterilants.Alcohols are commonly used sanitizers, effectively disrupting lipid membranes, which compromises cell integrity. They are also used as antiseptics and disinfectants due to their rapid action and versatility.Phenols and their derivatives phenolics , known for denaturing proteins and disrupting cell membranes, are particularly...
699
01:28Antimicrobial Effectiveness
870
The effectiveness of antimicrobial agents depends on various factors influencing their ability to eliminate microbial populations. Larger microbial populations require more time for complete eradication, emphasizing the importance of population size analysis when evaluating antimicrobial efficacy.Microbial resistance to antimicrobial agents varies significantly. Highly resilient microorganisms include endospores, gram-negative bacteria, and non-enveloped viruses, while prions are exceptionally...
870
01:29Factors Influencing Microbial Growth: pH
993
Microorganisms are classified as acidophiles, neutrophiles, or alkaliphiles based on their pH growth preferences, reflecting their adaptations to specific environments. Maintaining a stable intracellular pH is critical for macromolecular stability and enzymatic activity, which can be challenged by external pH variations.Neutrophiles, such as Escherichia coli, grow optimally between pH 5.5 and 8.0. These microorganisms inhabit neutral or slightly acidic environments and employ mechanisms like...
993