“Green” adsorbents in the wastewater treatment service

Abstract

In this study, the adsorption of acetic acid on the so-called "green" adsorbents was studied. Waste materials, i.e. eggshells and coffee grounds were used as adsorbents. In addition, activated carbon was used to compare the adsorption efficiency with "green" adsorbents. The obtained results showed that the equilibrium time of all studied adsorbents is achieved in 30 minutes. By comparing the adsorption efficiency of acetic acid on the tested adsorbents, it was shown that their use as cheap adsorbents under the tested conditions is possible. The coffee grounds showed a relatively high adsorption efficiency, very similar to the adsorption efficiency obtained when using the commercial and most commonly used adsorbent, i.e. activated carbon.