The adsorption process of activated carbon water treatment

• Posted by Carrie Ge November 30, 2020 - Filed in Arts & Culture - 762 views

  Because the adsorption process and principle of activated carbon water treatment are complex, there are many influencing factors. yongruida granular activated carbon It mainly involves the properties of activated carbon, pollutants in water, the process principle of activated carbon treatment, the selected operating parameters and operating conditions.

   

  1. The performance of activated carbon for water treatment should meet 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 special appearance of activated carbon; the adsorption speed is mainly related to the particle size and pore dispersion of activated carbon. The smaller the particle size of activated carbon, the faster the adsorption speed, but the head loss will increase. Generally speaking, it is in the range of 8-30 mesh. The mechanical wear resistance of activated carbon affects the service life of activated carbon.

   

  1. The nature of pollutants is very different from the adsorption capacity of the same activated carbon for different pollutants. Due to the different solubility, molecular structure and concentration of pollutants in water, the adsorption of activated carbon will change greatly.

   

  1. Temperature Since the adsorption process is an exothermic reaction, the adsorption heat is very small in liquid phase adsorption. When activated carbon is used to treat water, temperature has no significant effect on adsorption.

   

  1. The influence of coexistence of multi-component pollutants. When water is treated by adsorption, the water is usually not a single pollutant, but a mixture of multi-component pollutants. In the adsorption process, they can co-adsorb, promote or interfere with each other. Under normal conditions, the adsorption capacity of multi-component adsorption is lower than that of single-component adsorption.

   

  1. Adsorption operating conditions Because when activated carbon is adsorbed in the liquid phase, the external diffusion (liquid film diffusion) speed has an influence on the adsorption, so the type of adsorption device and the contact time (water passing speed) have an influence on the adsorption effect.https://www.powdered-activated-carbon.com