powdered activated carbon
Powdered activated carbon is a black powdery adsorbent material made mainly from wood chips, fruit shells, coal, etc., through a series of fine processes such as crushing, carbonization, and activation.
Powdered activated carbon is a black powdery adsorbent material made mainly from wood chips, fruit shells, coal, etc., through a series of fine processes such as crushing, carbonization, and activation.
Powdered activated carbon is a black powdery adsorbent material made mainly from wood chips, fruit shells, coal, etc., through a series of fine processes such as crushing, carbonization, and activation. Its raw material sources are extensive, and powdered activated carbon made from different raw materials has slight differences in performance: powdered activated carbon made from wood chips has good decolorization performance and is commonly used in the food and beverage industry; Fruit shell based powdered activated carbon has strong adsorption ability for small molecule impurities; Coal based powdered activated carbon has a low cost and is widely used in industrial wastewater treatment and other fields.
The working principle of powdered activated carbon is mainly based on adsorption, covering two mechanisms: physical adsorption and chemical adsorption.
1. Physical adsorption: By relying on van der Waals forces between molecules, when powdered activated carbon comes into contact with the liquid or gas to be treated, pollutant molecules will be adsorbed on the rich pore surface of the activated carbon. Its developed pore structure, including a large number of micropores and mesopores, provides a huge adsorption area, allowing numerous pollutant molecules to attach to it. This adsorption process is fast and reversible, and a decrease in temperature and an increase in concentration will promote the physical adsorption process.
2. Chemical adsorption: There are various functional groups on the surface of powdered activated carbon, such as hydroxyl and carboxyl groups, which can react chemically with specific pollutants, form chemical bonds, and firmly adsorb pollutants. Chemical adsorption has strong selectivity, and once it occurs, the adsorption effect is more stable and long-lasting. It is commonly used to treat specific types of pollutants.
Specifications | Technical indicators | Specifications | Technical indicators |
Granularity（100目）% | ≥90 | Acid soluble content% | ≤1.5 |
Methylene blue decolorization mg/g | ≥8-12 | Ash Content% | 3-5 |
Water content% | ≤10 | Chloride content% | ≤0.5 |
PH value | 5-7 |
1. Fast adsorption speed and high efficiency: The powder form of powdered activated carbon gives it a large specific surface area and exposed adsorption sites, allowing it to fully contact the processing object and quickly adsorb a large amount of impurities, pigments, odor molecules, organic matter, and heavy metal ions in a short period of time, achieving purification goals quickly. It is particularly suitable for scenarios that require high processing efficiency.
2. Strong decolorization ability: In industries such as food, beverage, sugar, and pharmaceuticals, powdered activated carbon, with its excellent decolorization performance, can effectively remove natural pigments, synthetic pigments, and colored impurities generated by oxidation and reaction in products, presenting a pure color and ensuring product quality.
3. Flexible application: As it is in powder form, the addition amount can be flexibly adjusted according to different processing requirements. Whether adding a small amount for fine liquid decolorization or adding a large amount for treating high concentration industrial wastewater, the best treatment effect can be achieved by precisely controlling the dosage.
4. Relatively low cost: Some powdered activated carbon is made from inexpensive raw materials and has relatively mature production processes. When applied on a large scale, it has a significant cost advantage compared to some adsorption materials made of special materials or processed with special techniques. It can control cost expenditures while ensuring treatment effectiveness.
5. However, there are difficulties in separation and recycling: powdered activated carbon is mixed with the treated object after use, making it difficult to completely separate and recycle through simple filtration and other methods. It is generally treated as waste, which to some extent limits its reuse, increases the cost of subsequent treatment, and puts pressure on environmental protection.
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