In activated carbon, the ph value refers to the pH of activated carbon.
The pH value of activated carbon is related to its production process. The pH value of activated carbon varies depending on the type of carbon. For example, the pH value of sugar carbon produced by zinc chloride method is 3~5, and the pH value of activated carbon is 3~5. The pH value of carbon is 5~7; the pH value of some physical activated carbon is 7~9. When activated carbon adsorbs organic pollutants from water, it generally decreases as the pH value of the solution increases. When the pH value is higher than 9.0, it is not easy to adsorb. The lower the pH value, the better the effect. In the same way, the higher the pH value, the better the adsorption effect. Weak. In practical applications, we determine the appropriate pH range through experiments.
The raw material of coconut shell activated carbon is the coconut shell commonly found in Southeast Asia and Hainan. There are many kinds of raw materials for fruit shell activated carbon, including apricot shells, date shells, peach shells, etc. Compared with coconut shell activated carbon, the particles are larger. Differences in iodine value and strength: The adsorption iodine value of coconut shell activated carbon is relatively high among activated carbons, generally reaching more than 1000, and the strength is around 97. Nutshell activated carbon is not as high as coconut shell activated carbon. Generally, the iodine value can reach more than 800 and the strength is around 95. Differences in functions and uses: Coconut shell activated carbon can be used for deodorization of food, alcohol, beverages, medicine, air purification activated carbon and high-purity drinking water, removal of heavy metals in water and decolorization of liquids. It is mostly used for purified water and drinking water treatment. Nutshell activated carbon can be used in chemical, pharmaceutical, sugar, beverage, alcohol purification industries, decolorization, refinement, purification and sewage treatment of organic solvents. Mostly used for industrial water treatment.
What kind of activated carbon is used for gold adsorption? Gold adsorption activated carbon is made from high-quality coconut shells and is refined using physical and steam activation production processes. Activated carbon for gold extraction has uniform particle size, high strength, strong adsorption capacity, and good wear resistance. It is suitable for modern gold mining production. It is mainly used for heap leaching or carbon slurry extraction of gold metallurgy, and the separation and separation of precious metals in industry. extract.
Decolorization refers to the removal of color from water or wastewater, and the removal of useless dye genes in wastewater or substances. Such a water treatment process is called decolorization. Activated carbon is often used in the decolorization process. So which type of activated carbon is better for decolorization? Activated carbon for decolorization often uses wood-based activated carbon, which is generally made from wood powder. Wood-based powdered activated carbon materials are divided into wood chips, walnut shells, apricot shells, coconut shells, peach shells, etc., and are refined through a series of processes. It has the advantages of developed pore structure, large specific surface area, large adsorption capacity, good adsorption performance, fast decolorization speed, fast filtration speed, durability, and easy regeneration. It can be used for decolorization and deodorization of MSG, sugar, alcohol, and beverages in the food industry. It is also widely used in sewage treatment, power plants, electroplating and other industries. Wooden powdered activated carbon is non-toxic and odorless, so it is better to use woody powdered activated carbon for decolorization.
Generally, crushed coal particles and powdered activated carbon are used. The size of activated carbon is selected according to the treatment process. The specifications are 1-2 mm, 2-4 mm, and 3-5 mm. The powder is available in 200 mesh and 325 mesh specifications. The purpose It is used to decolorize, deodorize, reduce COD, reduce heavy metals, etc.
The activated carbon in the activated carbon adsorption box is usually replaced every 6-8 months. This is just a time interval. The specific situation depends on the specific usage. Activated carbon has a strong adsorption capacity and can handle a variety of mixed organic waste gases at the same time. The purification effect is very good, and the volume of the activated carbon adsorption box is relatively small, so it is very simple to maintain, and the later maintenance and operation operations are very simple. Therefore, it is suitable for indoor and outdoor spaces. Activated carbon adsorption boxes are all feasible.
Activated carbon adsorption boxes are mostly used to treat organic waste gases with large air volumes and low concentrations. Activated carbon can effectively purify alcohols, ethers, benzene and their mixed organic waste gases, so it is often used in electronics, smelting, pharmaceuticals, rubber, plastics and other industries. , can also be used to deodorize factories and purify harmful waste gases in work workshops.
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