Powdered activated carbon is a widely used adsorbent with a very strong adsorption capacity. It has a highly developed pore structure and a huge specific surface area, which allows it to effectively adsorb and remove harmful substances such as organic substances, heavy metal ions, dyes, pesticides, etc. in water. 
The adsorption capacity of powdered activated carbon is mainly determined by its pore structure and specific surface area. It is very rich in pore structures, including micropores, mesopores, and macropores. These pores provide a large amount of surface area, allowing the activated carbon to come into full contact with the substances in the water, allowing for efficient adsorption. In addition, powdered activated carbon has high chemical stability, acid and alkali resistance, and oxidation resistance. These properties allow it to maintain a stable adsorption effect over a wide range of water quality. In the treatment of industrial wastewater and domestic sewage, powdered activated carbon is widely used in the pretreatment and advanced treatment stages. In the pre-treatment stage, it is able to remove large particulate matter and suspended solids from the water, improving the clarity of the water quality. In the advanced treatment stage, it can further remove organic substances, heavy metal ions and other harmful substances from the water, ensuring that the effluent quality meets the discharge or reuse standards. 
In addition to its application in the field of sewage treatment, powdered activated carbon is also widely used in food, medicine, chemical industry and other fields. In these areas, it is used to remove impurities from raw materials and improve the purity and quality of products. In conclusion, powdered activated carbon is a very effective adsorbent, and its strong adsorption capacity makes it widely used in various fields. With the continuous progress of science and technology and the continuous improvement of application needs, the research and development and application of powdered activated carbon will be more in-depth and extensive. 