Activated carbon, as an environmentally friendly adsorbent, has strong adsorption and catalytic performance, sufficient raw materials and high safety, acid and alkali resistance, heat resistance, insoluble in water and organic solvents, easy regeneration and other advantages, has strong adsorption capacity for organic pollutants dissolved in water such as benzene compounds, phenolic compounds, petroleum and petroleum products, etc.
It also has a good removal effect on organic pollutants that are difficult to be removed by biological and other chemical methods, such as chroma, methylene blue surfactants, herbicides, insecticides, synthetic dyes and many synthetic organic compounds.
In addition, activated carbon also has strong adsorption capacity for heavy metals in electroplating wastewater and smelting wastewater.
It has an obvious clarifying effect on the turbidity of the water, and can remove the abnormal odor and peculiar smell in the water.
It also has an excellent filtering effect on the bacteria. Therefore, activated carbon is getting more and more attention in water treatment.
However, due to the characteristics of ordinary activated carbon, such as high ash content, small pore volume, wide distribution of micropores, small specific surface area and poor adsorption selectivity, and some limitations of its surface functional groups and electrochemical properties, its adsorption and removal of pollutants is limited, far from meeting the requirements of domestic and foreign markets.
Therefore, it is necessary to modify its structure and properties to increase its adsorption capacity and relieve the pressure of water pollution.
At present, modified activated carbon material is widely used in the field of sewage treatment, and it shows more and more attractive prospects in the treatment of water environmental pollution.