Adsorption in the treatment of three wastes

The adsorption process is the process in which pollutant molecules or ions are adsorbed to the solid surface (the inner surface of porous materials). Usually, the free energy of molecules or ions will be reduced. Therefore, the adsorption process is an exothermic process, and the heat released is called the adsorption heat of the pollutant on the surface of porous materials. The porous adsorption materials (activated carbon and molecular sieve) have strong adsorption capacity for waste gas (volatile organic compounds), waste water (organic molecules and heavy metal ions), and waste residue (water-soluble leaching solution from residue). In this chapter, the basic principle, adsorption mechanism, adsorption functional materials, and application prospects for the adsorption treatment and recycling of "three wastes" (waste gas, waste water and waste residue) are briefly reviewed.