Characteristics of chemical adsorption of activated carbon from wood powder from Carrie Ge's blog

Wood powder activated carbon is refined and processed from some carbon-containing organic raw materials such as fruit shells and sawdust. The appearance of this product is black powder, strong adsorption capacity, non-toxic, odorless, large specific surface area, strong acid and alkali resistance, water immersion, high temperature, suitable for deep purification of water quality such as sugar, pharmaceuticals, beverages, and alcohol. It is also widely used in the decolorization, refining, purification and sewage treatment of organic solvents.

Because of its special water treatment effect, wood powder activated carbon is an advanced water treatment material compared to nut shell activated carbon and coconut shell activated carbon. activated carbon manufacturer south africa The physical adsorption of wood powder activated carbon is the adsorption produced by the molecular gravity between the adsorbate and the adsorbent, and its characteristics are:

1. No chemical reaction occurs, it can proceed at low temperature;

2. Physical adsorption can be single-layer adsorption or multilayer adsorption;

3. Due to thermal movement, the adsorbate can be freely transferred on the surface of the adsorbent, so it is easier to desorb;

4. The surface energy decreases during adsorption, so it is an exothermic reaction. Generally, the heat released per mole of adsorption is less than 20.9kj;

5. The adsorption selectivity is poor. For various substances, it is only the difference in the intermolecular force. The molecular attraction increases as the molecular weight increases. For the same series of compounds, the adsorption increases with the increase of molecular weight, which is called the Traube rule.

The chemical adsorption of wood powder activated carbon is a chemical effect between the adsorbate and the adsorbent due to the chemical bond force, which changes the chemical properties. The zinc particles adsorb mercury in the water to form a zinc amalgam alloy.www.granular-activated-carbon.com

The characteristics of chemical adsorption are:

1. Generally monolayer adsorption;

2. Chemical adsorption is often carried out at high temperature;

3. The adsorption is selective. When the chemical bond is strong, the adsorption is irreversible;

4. The adsorption heat is large, which is equivalent to the energy of chemical bonds, that is, the heat of chemical reaction.