Honeycomb activated carbon for sewage treatment

Honeycomb activated carbon is a new type of water treatment material. It has gradually gained attention in the field of sewage treatment due to its efficient adsorption capacity and long service life.

 

Honeycomb activated carbon is a new type of water treatment material. It has gradually gained attention in the field of sewage treatment due to its efficient adsorption capacity and long service life

1. Structure and characteristics of honeycomb activated carbon.

Honeycomb activated carbon is usually made by mixing activated carbon powder or granules with a binder and then extruding it. Its appearance presents a honeycomb structure. This honeycomb structure not only increases the specific surface area, but also ensures low pressure drop when air or liquid flows through, thereby improving the efficiency of water treatment. The pore structure of honeycomb activated carbon includes micropores, mesopores and macropores. The combination of these different pore sizes gives it excellent adsorption performance.  

 

The specific surface area of ​​honeycomb activated carbon is usually as high as 800 to 1500 square meters per gram, with a large porosity, which can provide more adsorption sites. Unlike traditional granular or powdered activated carbon, honeycomb activated carbon has a highly regular structure, which makes it have less resistance during filtration, adsorption and other treatment processes, and can effectively avoid clogging problems. In addition, the structure of honeycomb activated carbon makes it strong and suitable for various complex water treatment scenarios.

2. Adsorption mechanism of honeycomb activated carbon

The adsorption process of honeycomb activated carbon mainly relies on two mechanisms: physical adsorption and chemical adsorption. Physical adsorption uses the porous structure of honeycomb activated carbon to capture pollutants in water, such as organic compounds, heavy metal ions, suspended particles, etc. Physical adsorption mainly relies on van der Waals force and does not change the chemical properties of the adsorbate. Chemical adsorption involves chemical reactions between the surface active groups of honeycomb activated carbon and the adsorbate, such as redox reactions. This chemical adsorption has a significant effect on the removal of some toxic and harmful pollutants, especially some organic pollutants that are difficult to degrade.  

In addition, the surface of honeycomb activated carbon contains a large number of functional groups, such as carboxyl, hydroxyl and carbonyl, which can react with pollutants in different chemical reactions and help remove a variety of pollutants. At the same time, due to its uniform pore distribution, honeycomb activated carbon has a high adsorption effect on both large molecular organic matter and smaller molecular pollutants.  

 

3. Application of honeycomb activated carbon in sewage treatment

Honeycomb activated carbon is widely used and is mainly used in the following aspects in sewage treatment:

 

  Removal of organic pollutants

The porous structure and high specific surface area of ​​honeycomb activated carbon give it excellent adsorption performance for organic pollutants. Sewage often contains a large amount of organic matter, such as benzene, toluene, ethylbenzene, phenolic compounds, etc. These organic pollutants are potentially harmful to the environment and human health. Through the adsorption of honeycomb activated carbon, these organic matter can be effectively removed, water pollution can be reduced, and water quality can be improved.

Removal of heavy metal ions

Industrial wastewater usually contains high concentrations of heavy metal ions, such as lead, cadmium, chromium, mercury, etc. These heavy metals are highly toxic and difficult to remove by traditional physical and biological methods. The surface of honeycomb activated carbon carries many active groups, which can react with these heavy metal ions by complexation or precipitation, thereby removing heavy metal ions. In addition, honeycomb activated carbon has good chemical stability and can maintain its adsorption performance even in complex wastewater environments.  

Removal of odor and color

Some industrial wastewaters also contain substances with high odor and color, such as printing and dyeing wastewater, food processing wastewater, etc. These substances not only affect the water quality, but also affect the surrounding ecological environment and human health. Honeycomb activated carbon has excellent ability to remove odor and color. Through physical adsorption, it can effectively capture these odor molecules and make the water clear and odorless.  

Removal of suspended particles

The pore structure and strength of honeycomb activated carbon also give it a certain adsorption capacity for suspended particles. In the filtration system, honeycomb activated carbon can be used as part of the pretreatment equipment to remove suspended particles in the water and improve the efficiency of subsequent treatment steps. At the same time, the resistance of honeycomb activated carbon is low, which avoids the clogging problem that traditional activated carbon is prone to.

4. Advantages of honeycomb activated carbon

High-efficiency adsorption capacity

The high specific surface area, porous structure and rich surface functional groups of honeycomb activated carbon enable it to show high-efficiency adsorption capacity in sewage treatment, especially in removing difficult-to-degrade organic matter and heavy metal ions.

 

  Good mechanical strength

The honeycomb activated carbon is processed by a special molding process, and its structure is strong and can withstand high mechanical stress. In the water treatment process, the honeycomb activated carbon has a long service life and stable adsorption performance, and it is not easy to break even in harsh environments.

 

  Excellent fluid dynamics

The honeycomb structure of honeycomb activated carbon effectively reduces the resistance of water flow and improves the treatment efficiency. This makes it particularly suitable for large-scale continuous treatment systems, and can maintain high-efficiency adsorption performance under high flow rate conditions.