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 Types and Selection Criteria of Activated Carbon Based on raw materials and morphology, activated carbon is mainly classified into coconut shell activated carbon, coal-based activated carbon, wood-based activated carbon, and impregnated activated carbon. When selecting a type, factors such as application scenario, type of pollutant, pore size matching, and economics must be considered to ensure adsorption efficiency and service life.

 Regeneration and Recycling of Activated Carbon  Saturated activated carbon can regain its adsorption capacity through thermal regeneration, chemical regeneration, or steam activation. Thermal regeneration is the most common method, which uses high-temperature treatment to decompose or desorb the adsorbate, enabling the material to be reused and reducing operating costs.

 Application of Activated Carbon in Gold Recovery In gold extraction processes, activated carbon is used to adsorb gold complexes from cyanide leaching solutions. Coconut shell activated carbon, due to its high hardness, good adsorption performance, and regeneration capacity, has become the preferred material for carbon-in-powder (CIP) and carbon-in-liquid (CIL) processes.

 Applications of Activated Carbon in the Chemical Industry:  In chemical production, activated carbon is used as a catalyst support, solvent recovery medium, and gas separation material. For example, it is used in the petrochemical industry to recover volatile solvents and in synthesis processes to load active components to improve reaction efficiency.

 pplications of Activated Carbon in the Pharmaceutical Industry Pharmaceutical-grade activated carbon is used for drug purification, antidote preparation, and hemoperfusion. Its high purity and strictly controlled pore size distribution enable it to effectively adsorb toxins or excess drug components in the body, making it invaluable in emergency medicine.

                                   Applications of Activated Carbon in the Food Industry:  Activated carbon is used in the food industry for decolorization, deodorization, and refining. For example, it is used for decolorizing syrups in sugar refining, removing impurities in edible oil refining, and stabilizing color and taste in the production of alcoholic beverages and soft drinks.

                                Applications of Activated Carbon in Air Purification In the field of air purification, activated carbon is commonly used to adsorb volatile organic compounds, formaldehyde, benzene compounds, and odorous gases. Common forms include granular activated carbon, honeycomb activated carbon, and impregnated activated carbon, and it is used in household air purifiers, industrial waste gas treatment, and in-vehicle air purification.

              Applications of Activated Carbon in Water Treatment Activated carbon is widely used in drinking water purification, industrial wastewater treatment, and municipal sewage treatment. It can effectively remove residual chlorine, odor, color, and some organic pollutants from water, and is often used in water purifier filter cartridges or adsorption units of large-scale water treatment facilities.

                                  The Adsorption Principle of Activated Carbon  Activated carbon adsorption primarily relies on physical processes, namely van der Waals forces. Impurity molecules in gases or liquids are trapped as they flow through the pores of activated carbon. For certain specific pollutants, chemical modification can introduce a chemisorption mechanism to improve selective adsorption capacity.

                                Basic Definition and Structure of Activated Carbon  Activated carbon is a specially treated carbon material, primarily derived from carbon-containing materials such as coconut shells, wood, and coal. Through high-temperature carbonization and activation treatment, it forms a large number of micropores, mesopores, and macropores, resulting in a huge specific surface area (typically 500–1500 m²/g). This porous structure is the physical basis of its adsorption properties.