The main influencing factors of coal columnar activated carbon water treatment: Due to the complex adsorption process and principle involved in coal columnar activated carbon water treatment, there are also many influencing factors. It is mainly related to the properties of activated carbon, the properties of pollutants in water, the process principle of activated carbon treatment, and the selected operating parameters and conditions.

1、 Properties of coal columnar activated carbon

Coal based columnar activated carbon exhibits adsorption on the surface of the adsorbent, so the specific surface area of the adsorbent is one of the important factors affecting adsorption. The larger the specific surface area, the better the adsorption performance.

Coal based columnar activated carbon can be regarded as a three-stage adsorption process, and internal diffusion has a significant impact on the adsorption rate. Therefore, the microporous distribution of activated carbon is another important factor affecting adsorption.

In addition, the surface chemical properties, polarity, and charge carried by coal columnar activated carbon also affect the adsorption effect.

Coal based columnar activated carbon for water treatment should have three requirements: large adsorption capacity, fast adsorption speed, and good mechanical strength. The adsorption capacity of activated carbon is mainly related to its specific surface area, in addition to other external conditions. With a larger specific surface area and more micropores, there are more adsorbates that can be adsorbed on the pore walls. The adsorption rate is mainly related to particle size and pore distribution. Activated carbon used in water treatment requires well-developed transition pores (radius 20-1000A), which are conducive to the diffusion of adsorbates into the micropores. The smaller the particle size of activated carbon, the faster the adsorption rate, but the head loss should be in the range of 8-30 mesh, which is generally suitable. The mechanical wear resistance of activated carbon directly affects its service life.

Step 2: Properties of coal columnar activated carbon adsorbates (solutes or pollutants)

The adsorption capacity of the same activated carbon for different pollutants varies greatly.