同时存在的化增强污染物降解在化氧化过程中
Zhenyu Zhao1, Yufan Chen2, Zhengwei Zhou1
1State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science & Engineering, Tongji University, Shanghai 200092, PR China.
Journal of hazardous materials
|September 22, 2024
概括
新形成的铁酸盐通过促进反应性氧物种的产生,显著增加了酸盐介导的硫甲醇降解. 然而,矿物转化限制了长期的有效性,突出了化.
科学领域:
- 环境化学环境化学
- 地质化学 地质化学
- 矿物学是什么?矿物学是什么?
背景情况:
- (Py) 氧化产生反应性氧物种 (ROS) 用于污染物降解.
- 同时存在的Fe (III) 矿物质在Py介导的污染物降解中的作用尚不清楚.
研究的目的:
- 为了研究新形成的铁酸盐 (Fh) 对酸盐介导的硫甲醇 (SMX) 降解的影响.
- 阐明 Fh 影响 Py 中介氧化过程的机制.
主要方法:
- 56 铁同位素追踪器实验.
- 控制实验以评估降解途径.
- 对矿物转化和SMX降解效率的分析.
主要成果:
- 新形成的Fh显著增强了Py的SMX降解.
- Py将Fh降低到Fe (II) 种,通过O2降低促进H2O2生成.
- 通过Py介导的Fh转化为戈/血会降低长期降解效率.
- 连续添加F (10mM) 在三天内将SMX降解率提高了60%.
结论:
- 铁酸盐在增强氧化氧化氧化氧化氧化氧化氧化氧化氧化氧化氧化氧化氧化氧化氧化氧化氧化氧化氧化氧化氧化氧化氧化氧化氧化氧化氧化氧化氧化氧化氧化氧化氧化氧化氧化氧化氧化氧化氧化氧化氧化氧化氧化氧化氧化氧化氧化氧化氧化氧化氧化氧化氧化氧化氧化氧化氧化氧化氧化氧化氧化氧化氧化.
- 初始存在和连续供应的反应性铁酸盐是持续污染物去除的关键.
- 矿物转化动力学会影响合并的化铁化系统的整体效率.
更多相关视频
09:31Preparation of Authigenic Pyrite from Methane-bearing Sediments for In Situ Sulfur Isotope Analysis Using SIMS
Published on: August 31, 2017
7.6K
09:45Laboratory Simulation of an IronII-rich Precambrian Marine Upwelling System to Explore the Growth of Photosynthetic Bacteria
Published on: July 24, 2016
11.7K
相关概念视频
01:17Precipitation and Co-precipitation
1.7K
Precipitation and coprecipitation methods can be used to separate a mixture of ions in a solution. In qualitative inorganic analysis, ions that form sparingly soluble precipitates with the same reagent are separated based on the differences in solubility products. For example, consider the separation of Cu(II) and Fe(II) ions by precipitation as insoluble sulfides. First, copper(II) sulfide is precipitated by the addition of acidic H2S, where the dissociation of H2S is suppressed. Adding H2S...
1.7K
00:46Bioremediation
18.2K
Bioremediation is the use of prokaryotes, fungi, or plants to remove pollutants from the environment. This process has been used to remove harmful toxins in groundwater as a byproduct of agricultural run-off and also to clean up oil spills.
18.2K
02:49Corrosion
23.9K
The degradation of metals due to natural electrochemical processes is known as corrosion. Rust formation on iron, tarnishing of silver, and the blue-green patina that develops on copper are examples of corrosion. Corrosion involves the oxidation of metals. Sometimes it is protective, such as the oxidation of copper or aluminum, wherein a protective layer of metal oxide or its derivatives forms on the surface, protecting the underlying metal from further oxidation. In other cases, corrosion is...
23.9K
03:45Formation of Complex Ions
23.5K
A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...
23.5K
00:52Washing, Drying, and Ignition of Precipitates
885
After filtration, the precipitate is washed to remove coprecipitated impurities and any remaining mother liquor. Colloidal precipitates, such as silver chloride, are washed with an electrolyte (such as dilute nitric acid) to prevent the peptization of the precipitate. In the case of slightly soluble precipitates, the wash solution contains a common ion to reduce solubility. Lead sulfate, which is slightly soluble in water, is washed with dilute sulfuric acid. Similarly, wash solutions may be...
885
00:56Extraction: Advanced Methods
432
Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is...
432