精久久中文字幕人妻无码,精品国产伦一区二区三区a,在线视频好看到停不下来

UV Advanced Oxidation

紫外高級氧化1.jpg

Advanced Oxidation Processes (AOPs) are an effective solution for treating refractory organic pollutants.

The core of AOPs lies in the generation of hydroxyl radicals (OH) or other reactive free radicals with extremely strong oxidizing power, which can non-selectively degrade organic pollutants and mineralize them into small inorganic molecules such as CO2 and H2O.

Ultraviolet Advanced Oxidation Processes (UV-AOPs) combine ultraviolet light with oxidants (such as hydrogen peroxide (H2O2) and ozone (O3)) or photocatalysts (such as titanium dioxide (TiO2)) to generate highly reactive free radicals, which in turn oxidize and degrade organic pollutants in water.

The hydroxyl radical (OH) is the primary reactive oxidant species in most UV-AOPs. It is an extremely strong oxidant with a standard redox potential of 2.80 V (vs. standard hydrogen electrode), second only to fluorine.

·OH is highly reactive and non-selective, rapidly attacking C-H bonds, C=C double bonds, and aromatic rings in the molecular structures of nearly all organic pollutants.

·OH is generated through various pathways. In the UV/H2O2 process, H2O2 undergoes homolytic cleavage under UV light to produce ·OH.

In the UV/O3 process, O3 photolysis produces H2O2, which in turn photolyzes to produce ·OH. Furthermore, O3 decomposition itself can also produce ·OH under certain conditions.

光反應模型cfd模擬圖.png

UV light plays multiple roles in UV-AOPs:

1. Direct photolysis of organic matter: For certain organic pollutants with specific chemical structures (such as those containing unsaturated bonds or specific chromophores), UV light of a specific wavelength can directly break their molecular bonds, causing photolysis.

2. Activation of oxidants: This is the primary function of UV-AOPs. UV photons can be absorbed by oxidant molecules (such as H?O? and O?), providing sufficient energy for their decomposition to produce ·OH or other active free radicals.

Pollutant degradation pathways occur through the following reactions between the generated ·OH and organic pollutants:

·Hydrogen abstraction: OH abstracts hydrogen atoms from organic molecules, forming organic free radicals, which can undergo further oxidation.

·Electrophilic addition: OH adds to unsaturated bonds (such as C=C or C=C) or aromatic rings in organic molecules, forming addition product free radicals.

·Electron transfer: OH removes electrons from organic molecules, causing oxidation.

The organic free radicals or intermediates generated by these initial reactions are generally unstable and will continue to undergo chain scission, ring opening, and oxidation reactions, gradually degrading into smaller, less toxic intermediates. Ultimately, ideally, they can be completely mineralized into simple inorganic substances such as CO2, H2O, and inorganic acids.

The treatment effectiveness of UV-AOPs is influenced by a combination of factors:

·UV light source characteristics

·Oxidant type and concentration

·Water quality conditions

·Target pollutant characteristics

·Reactor design

gai.1412.png

·UV/Persulfate (PS/PDS) Process: Persulfates include potassium permonosulfate complexes (PMS, the main active ingredient is HSO?) and peroxydisulfates (PDS, S?O??). When activated by ultraviolet light (typically 254 nm or shorter wavelength), they effectively generate highly oxidizing sulfate radicals (SO??, E? = 2.5-3.1 V) and hydroxyl radicals (OH).

·UV/Chlorine Process: This process utilizes UV light to irradiate a chlorine-containing disinfectant (such as free chlorine (HOCl?/OCl?) or combined chlorine (such as monochloramine (NH?Cl?)) to generate OH and reactive chlorine radicals (RCS, such as Cl? and Cl??). These radicals work synergistically to degrade organic pollutants.

Ultraviolet advanced oxidation processes (UV-AOPs) have been increasingly widely used in drinking water deep treatment, industrial wastewater treatment, municipal wastewater recycling and reuse, and emerging contaminants (ECs) control due to their advantages in efficiently degrading refractory organic matter, reducing disinfection by-products, and improving water quality safety.

Previous
UV photolysis

Next
Reverse Osmosis

Municipal Municipal Wastewater Municipal water supply Recycled Water Reuse Township water supply and drainage Industrial Park New pollutant control Water ecological restoration project

Industry Pretreatment of industrial high-difficulty wastewater Pesticide Industry API pharmaceuticals Chemical waste salt purification Food & Beverage Industry Pharmaceutical Purified water Chip Fabrication Oilfield reinjection water Industrial zero emissions

Commercial Secondary water supply Pool & Aquarium High-quality drinking water POE/POU Aquaculture Cooling Circulating water Laboratory applications

UV-AOPs Wastewater Biodegradability Pretreatment of highly toxic industrial wastewater Chemical active agents Cyanide Organic Complexes

Craftsmanship UV disinfection UV photolysis UV Advanced Oxidation Reverse Osmosis Alternative to pasteurization UV photochemical reaction Ozone oxidation

Resource Recycling waste plastics Construction waste Renovation waste

Municipal WSH UV Disinfection System WTV UV Disinfection Vertical System ZL UV Disinfection System Clear Medium Pressure UV Disinfection System MOL Ceramic Plate CD Ozone Generator UV-AOP Advanced Oxidation System D.FITE Cloth Filter

Industry ZL UV Disinfection System Clear Medium Pressure UV Disinfection System UV-AOP Advanced Oxidation Extrem Medium Pressure UV Disinfection System EX-U UV Sterilizer EX-UPW-TOC UV TOC System MOM Ceramic Plate CD Ozone Generator MOS Ceramic Plate CD Ozone Generator UV-Fenton UV-Oxidation

Commercial EX-L UV Sterilizer EX-U UV Sterilizer ZL UV Disinfection System CLEAR Medium pressure UV Disinfection System OneUV UV Sterilizer Extrem Medium pressure UV Disinfection System UV-AOP Advanced Oxidation MOS Ceramic Plate CD Ozone Generator COG Ceramic Plate CD Ozone Generator

Photochemistry UV-Fenton Medium-pressure UV-Oxidation UV Photolysis Pasteurization UV Alternatives UV Photocatalysis Low Pressure UV-Oxidation

Resource Recycling AI Optical Sorter Al high-speed sorting robot AI heavy-duty sorting robot

Others SATBR Integrated Wastewater Treatment System D.FITE Cloth Filter Modular Wastewater Treatment System ModuOzone Ceramic Plate CD Ozone Generator

After-Sales Services Spare parts replacement Product Repair System Support Renovation Regular maintenance Software Upgrade

Technical Support Process Support Product Training Research & Development Small Test Pilotscale experiment Online dose monitoring UV dose design

Channel Services Municipal Industry Business OEM

Spare parts Low Pressure lamps Low Pressure Amalgam Lamps Medium Pressure Mercury Lamp VUV Low-pressure Mercury Lamp（185nm） Quartz sleeve Ballasts UV Intensity Sensor UV transmittance tester Sealing accessories Other Spare parts replacement

Industry Applications

About Us

Applications

Products

News

Services

Resources

Contact us