1. The nature of pollutants The adsorption capacity of the same activated carbon for different pollutants is very different. Since the molecular structure, solubility, polarity, and contaminant concentration of the contaminants in water are all different, the adsorption ability of activated carbon varies greatly.
  2. Properties of activated carbon Activated carbon for water treatment should have three requirements: fast adsorption, large adsorption capacity, and good mechanical strength. The adsorption rate of activated carbon is mainly related to the particle size and pore distribution of activated carbon. The water treatment activated carbon requires its transition pores to be developed, which is conducive to the diffusion of adsorbate (contaminants in water) into the micropores. The smaller the particle size of activated carbon, the faster the adsorption rate. Fast, but head loss may increase, generally in the 8-30 mesh range is more appropriate. The adsorption capacity of activated carbon, in addition to other external conditions, is mainly related to the surface of the activated carbon. The mechanical wear resistance of activated carbon directly affects the service life of activated carbon.
  3, temperature Because the adsorption process is an exothermic reaction, adsorption heat in the liquid phase adsorption is small, so when using activated carbon to treat water, the temperature on the adsorption of the impact is not very clear.
  4. Influence of the coexistence of multi-component pollutants When applied to the treatment of water by adsorption, the pollutants in the water are usually not single but a mixture of multi-component pollutants. Therefore, when they are adsorbed, they can be adsorbed to each other and play a role in mutually promoting or interfering with each other. In general, the adsorption capacity of single-component adsorption is higher than that of multi-component adsorption.
  5, the operating conditions of the adsorption of liquid activated carbon adsorption, the diffusion rate (liquid film diffusion) will have a certain impact on the adsorption, so the adsorption device type, contact time (water speed) on the adsorption effect will have some Different degrees of influence.