氧化对Microcystis aeruginosa通过各种活性氧物种的无活化的影响:降解效率,机制和生理性质
Heshan Zheng1, Yongjie Zheng1, Le Yuan1
1College of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar 161006, China.
Bioresource technology
|May 8, 2024
概括
热激活的硫酸盐 (热/PDS) 和过氧酸 (热/PAA) 有效地使藻类无活化. 热/PDS使用硫酸盐基来破坏高级细胞,而热/PAA则触发细胞内反应以增强藻类无活化.
科学领域:
- 环境科学 环境科学
- 水处理 处理水的方法
- 氧化过程 氧化过程
背景情况:
- 藻类繁殖带来了重大的环境和健康风险.
- 有效的藻类灭活方法对于水质管理至关重要.
- 先进的氧化工艺为水资源整治提供了有前途的解决方案.
研究的目的:
- 为了研究热激活的过氧乙酸 (热/PAA) 和热激活的硫酸 (热/PDS) 对于微囊气球菌无活化的疗效.
- 阐明涉及的基因物种及其在藻类细胞破坏中的作用.
- 为了比较热/PAA和热/PDS在藻类灭活中的性能.
主要方法:
- 使用热量/PAA和热量/PDS.微囊气球菌无活化.
- 对藻类无活化过程的动态分析.
- 识别和量化产生的反应性氧物种 (ROS).
- 细胞膜完整性和细胞内反应的分析.
主要成果:
- 热/PDS过程遵循第一阶反应动力学.
- 基 (•OH) 和硫酸盐基 (SO4-•) 都有助于细胞破坏,其中SO4-•占主导地位.
- 热/PAA产生有机基 (RO•),基基 (•OH) 和单片氧 (O2).
- 硫酸盐在破坏藻类细胞膜方面表现出卓越的能力.
- SO4促进细胞溶解,通过将蛋白质转化为芳香碳化合物.
- 通过细胞内先进的氧化反应,PAA诱导细胞死亡.
结论:
- 热活化硫酸盐对藻类无活化非常有效,主要是通过SO4介导的细胞膜破坏.
- 热活性酸也有效,通过透细胞并启动内部氧化损伤而起作用.
- 热/PDS和热/PAA都已被验证为有效的控制Microcystis aeruginosa的战略.
相关概念视频
Radical Autoxidation
2.1K
The oxidation of an organic compound in the presence of air or oxygen is called autoxidation. For example, cumene reacts with oxygen to form hydroperoxide. Autoxidation involves initiation, propagation, and termination steps. Many organic compounds are susceptible to autoxidation—especially ethers in the presence of oxygen, which form hydroperoxides. Even though this reaction is slow, old ether bottles contain small amounts of peroxide, which leads to laboratory explosions during ether...
2.1K
The Electron Transport Chain
16.6K
The electron transport chain or oxidative phosphorylation is an exothermic process in which free energy released during electron transfer reactions is coupled to ATP synthesis. This process is a significant source of energy in aerobic cells, and therefore inhibitors of the electron transport chain can be detrimental to the cell's metabolic processes.
Inhibitors of the electron transport chain
Rotenone, a widely used pesticide, prevents electron transfer from Fe-S cluster to ubiquinone or Q...
Inhibitors of the electron transport chain
Rotenone, a widely used pesticide, prevents electron transfer from Fe-S cluster to ubiquinone or Q...
16.6K
Oxidation of Phenols to Quinones
3.0K
In the presence of oxidizing agents, phenols are oxidized to quinones. Quinones can be easily reduced back to phenols using mild reducing agents. The electron-donating hydroxyl group enhances the reactivity of the aromatic ring, enabling oxidation of the ring even in the absence of an α hydrogen.
o-hydroxy phenols are oxidized to o-quinones and p-hydroxy phenols to p-quinones. Such redox reactions involve the transfer of two electrons and two protons. The reversible redox...
o-hydroxy phenols are oxidized to o-quinones and p-hydroxy phenols to p-quinones. Such redox reactions involve the transfer of two electrons and two protons. The reversible redox...
3.0K
Radical Oxidation of Allylic and Benzylic Alcohols
2.0K
Activated manganese(IV) oxide can selectively oxidize allylic and benzylic alcohols via a radical intermediate mechanism. Primary allylic alcohols are oxidized to aldehydes, while secondary allylic alcohols yield ketones. The redox reaction of potassium permanganate with an Mn(II) salt such as manganese sulfate (under either alkaline or acidic conditions), followed by thorough drying, yields the oxidizing agent: activated MnO2. While MnO2 is insoluble in the solvents used for the reaction, the...
2.0K
Oxidation of Alcohols
13.0K
In this lesson, the oxidation of alcohols is discussed in depth. The various reagents used for oxidation of primary and secondary alcohols are detailed, and their mechanism of action is provided.
The process of oxidation in a chemical reaction is observed in any of the three forms:
The process of oxidation in a chemical reaction is observed in any of the three forms:
13.0K
Oxidative Cleavage of Alkenes: Ozonolysis
10.3K
In ozonolysis, ozone is used to cleave a carbon–carbon double bond to form aldehydes and ketones, or carboxylic acids, depending on the work-up.
Ozone is a symmetrical bent molecule stabilized by a resonance structure.
Ozone is a symmetrical bent molecule stabilized by a resonance structure.
10.3K


