As the adsorption process and principle of action involved in activated carbon water treatment are more complicated, there are many influencing factors. It is mainly related to the nature of activated carbon, the nature of pollutants in the water, the process principle of activated carbon treatment, and the selected operating parameters and operating conditions.
- The properties of activated carbon The activated carbon used in water treatment should have three requirements: large adsorption capacity, fast adsorption speed, and good mechanical strength. In addition to other external conditions, the adsorption capacity of activated carbon is mainly related to the specific surface of the activated carbon; the adsorption speed is mainly related to the particle size and the pore distribution of the activated carbon. activated carbon manufacturer south africa The activated carbon for water treatment requires a more developed transition pore (radius 20-1000 angstroms), which is conducive to adsorption The substance (pollutant in water) diffuses into the micropores. The smaller the particle size of activated carbon, the faster the adsorption speed, but the head loss will increase, generally in the range of 8-30 mesh. The mechanical abrasion resistance of activated carbon affects the service life of activated carbon.
- The nature of pollutants The adsorption capacity of the same activated carbon for different pollutants is very different. Due to differences in the solubility, molecular structure, polarity and concentration of pollutants in water, the adsorption capacity of activated carbon varies greatly.
- Temperature Since the adsorption process is an exothermic reaction, the heat of adsorption is small during liquid phase adsorption. When activated carbon is used to treat water, the temperature has no significant effect on adsorption.
- The effect of coexistence of multi-component pollutants When applied to water treatment by adsorption method, the water is usually not a single pollutant, but a mixture of multi-component pollutants. www.granular-activated-carbon.com During adsorption, they can be co-adsorbed to promote or interfere with each other. In general, the respective adsorption capacity of multi-component adsorption is lower than that of single-component adsorption.
- Adsorption operating conditions Because the speed of external diffusion (liquid film diffusion) has an effect on the adsorption during the liquid phase adsorption of activated carbon, the type of adsorption device and the contact time (water flow rate) have an impact on the adsorption effect.
As the adsorption process and principle of action involved in activated carbon water treatment are more complicated, there are many influencing factors. It is mainly related to the nature of activated carbon, the nature of pollutants in the water, the process principle of activated carbon treatment, and the selected operating parameters and operating conditions.
