Acid-base modification is to use acid, alkali and other substances to treat activated carbon, according to the actual need to adjust the surface functional groups of activated carbon, make it change, improve its ability of adsorption of metal ions, so as to achieve the desired adsorption effect.Acid-base modification of activated carbon is usually carried out to improve the adsorption effect of activated carbon on metal ions represented by copper ions. The commonly used modifiers include HC1, NaOH and citrate 3.It was found that by acid-base modification of common coal activated carbon, the ash content of the activated carbon could be greatly reduced and the specific surface area of the activated carbon could be increased
Adsorption capacity refers to the amount of adsorbents adsorbed on the adsorbent per unit mass under certain conditions. It is usually expressed in terms of K adsorbents /kg of adsorbent or mass percentage, which is a sign of the adsorption capacity of the adsorbent.
In industry, the amount of adsorption is called the activity of the adsorbent.
The activity of the adsorbent can be expressed in two ways :(1) the static activity of the adsorbentUnder certain conditions, the equilibrium adsorption capacity of the adsorbent is its static activity.For a certain adsorption system, the static activity depends only on the adsorption temperature and the concentration or partial pressure of the adsorbed substance.activated carbon pellets wholesale
Dynamic activity of adsorbents
Under certain operating conditions, the gas mixture by adsorption bed, adsorption by adsorption, adsorption after a period of time, when starting from the adsorbent in the laminar flow of the gas adsorbed mass (or its concentration reaches a specified value), think bed fire, adsorption properties of adsorbent adsorption quantity at this time is called dynamic activity of adsorbent. powdered activated carbon supplier
The activity is not only related to the characteristics of adsorbents and adsorbents, but also related to temperature, concentration and operating conditions.