Introduction to water treatment of titanium anode

Introduction to water treatment of titanium anode
Regarding water treatment, let’s first talk about water pollution: the total amount of water in the earth is about 1.4*102.8 billion m3, but 97.3% (volume fraction) is ocean salt water that cannot be used by people, and the surface fresh water that can be used by human production and life is only Accounting for 0.01% of the total water on the earth, more than 2/3 of other fresh water is fixed in the ice sheets of the polar regions and mountain glaciers, and nearly 1/3 is trapped in the underground aquifer. Human beings are not only facing a global water crisis, but also with the rapid development of industry and agriculture and population growth, the amount of sewage discharged has increased sharply, causing many rivers, lakes, reservoirs and even groundwater to be polluted to varying degrees. It can be said that wherever there is human habitation and production, there is a problem of domestic sewage and factory wastewater treatment.

At present, in terms of the types of water disinfection, there are agents and methods such as chlorine gas, sodium hypochlorite, bleaching powder, chlorine dioxide, trichloroisocyanuric acid, hydrogen peroxide, and ozone. In addition, there are some methods such as iodine water, high-priced oxidized water, and ultraviolet disinfection. . Among all the disinfectants, although chlorine gas is the most economical, due to the unsafe transportation and storage of chlorine gas; and the low solubility of gas and water when it is added, the pressure of chlorine gas cylinders is constantly changing, and there is insufficient dosing and metering. Accurate problem; In addition, the extremely strong diffusivity of chlorine gas and other gases has a poisonous effect on the environment, and the high activity of free chlorine is easy to form a class of carcinogenic chlorinated compounds such as chloroform, carbon tetrachloride, and dioxin with many organic substances. Organic compounds cause the second pollution of the environment. Therefore, there are more and more proposals to cancel liquid chlorine, and people are paying more and more attention to it. Abroad, developed countries such as the U.S., Germany, Japan, etc. restrict the use of chlorine gas, especially public places and waterworks mainly use sodium hypochlorite liquid for disinfection. Chlorine is mainly used for disinfection of the final tail water discharge in large-scale sewage treatment.

Electrocatalytic oxidation treatment of wastewater: In recent years, the use of advanced oxidation technology to treat refractory organic matter in water has become a research hotspot. Advanced Oxidation Technology, also known as Deep Oxidation Technology, is characterized by the production of hydroxyl radicals with strong oxidizing ability HO. Under the reaction conditions of high temperature and high pressure, electricity, sound, light irradiation, catalysts, etc., it can oxidize and degrade macromolecular refractory organic compounds. into low-toxic or non-toxic small molecular substances. Electrochemical treatment of wastewater includes direct electrolysis and indirect electrolysis, which effectively improves the probability of removing organic matter. Electrolytic oxidation, or electrochemistry, treats water including domestic sewage, industrial water, and factory wastewater. Because it does not cause pollution, it is called green water treatment.

The role of electrode materials in the treatment of wastewater by electrolysis: Selection of electrode materials: In the process of electrolytic treatment of organic wastewater, electrodes not only play the role of transmitting current, but also catalyze the oxidation and degradation of organic matter. Therefore, the choice of electrode materials , which directly affects the degradation efficiency of organic matter. Different electrode materials have different degradation reaction mechanisms.

The new technology of electrolytic water treatment has attracted much attention because of its advantages of no need to add chemicals, small equipment size, small footprint, and no secondary pollution. It has been used to treat water containing hydrocarbons, alcohols, aldehydes, ethers, and phenols. Its bactericidal effect is stronger than that of chlorine, and it is a truly efficient, broad-spectrum, and safe strong sterilizing and virucidal agent. It has been widely used in the disinfection and epidemic prevention of various water bodies including tap water, reclaimed water, industrial circulating water, swimming pool water, and hospital sewage. Compared with other disinfectants, sodium hypochlorite solution has great advantages. It is clear and transparent, soluble in water, completely solves the technical difficulties of gas disinfectants such as chlorine gas, chlorine dioxide, ozone, etc. There are safety hazards such as running, leaking, leaking, and poisoning that pharmaceuticals often have. During disinfection, there are no side effects that are harmful to health or damage the environment, and there are no many sediments brought about by the use of bleaching powder.

Titanium electrode is a new product that the cathodic protection anode installed on the sodium hypochlorite generator catalyzes oxidation and degrades water quality through electrode reaction. Its overall response is expressed as follows:

NaCl + H2O → NaClO + H2↑ Electrode reaction: Anode: 2Cl- - 2e → Cl2 Cathode: 2H+ + 2e → H2 Solution reaction: 2NaOH + Cl2 → NaCl + NaClO + H2O

The titanium anodes for water treatment produced by our company are coated with special materials. Titanium electrodes are an essential core device for disinfectant generators. The production process is simple, with less investment and quick results. Water and salt are used as raw materials for production, and AC 220V power is used, which is convenient for obtaining materials and simple for production. The output of disinfectant is stable, the output is high, and the service life of the product is long.

Sodium hypochlorite generated after treatment with titanium electrodes can also decompose trace amounts of pesticides remaining on agricultural and sideline products such as vegetables and fruits. It plays an important role in promoting the development of modern agriculture and fruit and vegetable packaging industry. It is also worthy of recognition that since the disinfectant produced by the sodium hypochlorite generator does not produce free chlorine in water like chlorine gas, chlorine dioxide and other disinfectants, it is generally difficult to form carcinogens that are not conducive to human health due to the presence of free chlorine. It is not like ozone, as long as there is a very small amount (0.001mg/m3) in the air, it will cause damage and poison to life; moreover, it will not cause serious damage to metal pipes like chlorine gas reacts with water to form hydrochloric acid. corrosion.

For water treatment, our company's main products are ruthenium metal oxide coated titanium anodes and iridium platinum oxide coated titanium anodes, titanium anodes for tap water and domestic water treatment, titanium anodes for food utensil disinfection and swimming pool water disinfection, etc.

In recent years, the output of miniature sodium hypochlorite disinfectant generators has been increasing. The volume of the electrolytic cell of the smallest generator is only 0.5L, the available chlorine content is 1.2g/L, and the size of the coated titanium electrode is 3cm in diameter. The generator is very popular because it is light and easy to carry.

Hypochlorous acid is a very small neutral molecule, which can diffuse to the surface of negatively charged bacteria, and penetrate into the inside of the bacteria through its cell wall to oxidize, thereby killing bacteria. The natural pond water originally contained 1.1×105 Escherichia coli/L, and the total number of bacteria was 2×104/mL. After adding sodium hypochlorite for disinfection for 5 minutes, the number of E. coli was 100/L, and the total number of bacteria was only 100/mL. The disinfected pond water has been tested by the health department and meets the drinking water standard. The small sodium hypochlorite generator is suitable for the sterilization and disinfection of unclean drinking water, such as river water, well water, and sugar water. It is especially useful for field operations, field troops, and areas with water supply systems.

Sodium hypochlorite can quickly kill various pathogenic bacteria and viruses, such as Escherichia coli, Staphylococcus aureus\Hepatitis B virus\Bacillus subtilis spores and so on. Using disinfectant to disinfect and sterilize household daily necessities and living environment can effectively prevent infectious diseases such as hepatitis, typhoid, cholera, and dysentery.

Sodium hypochlorite can be used to disinfect tableware and tea sets, and the effect is better than high-temperature disinfection;

It can be used for disinfection, cleaning and deodorization of kitchen utensils, bathtubs and sanitary appliances;

It can be used to disinfect items and clothes used by patients;

It can be used to sterilize feeding bottles and toys used by infants;

It can be used for surface disinfection of fruits, fish and vegetables;

Can be used for disinfection and sterilization of swimming pool water.

Titanium anodes consist of an inert titanium substrate and an active coating of noble metal oxides on it. In the past few years, our company has been committed to providing the most ideal anode products for each application field, and has also accumulated rich experience. Hope to help your company in the future development! Create a better future!

If you want to know more information about this kind of products, you can contact our company at any time.