Pharmaceuticals and personal care products, known as emerging contaminants (ECs), receive a special attention for the reason of their potential impact on the environment and human health [1]. The efficiency of ECs removal strongly depends on the technology implemented in the wastewater treatment plants which are usually based on conventional systems: chlorine, biological treatments, activated carbon adsorption, advanced oxidation processes, electrochemical systems [2]. The use of activated carbons (ACs) in these technologies have demonstrated a high adsorption capacity for ECs depending on their porous structure and surface chemistry. Here we present the research of the adsorption processes of phenazone (C11H12N2O, MM 188.23) on activated carbon AC-K in order to establish its adsorption capacities against emergent contaminants. The measurements were carried out at two pH values (pH=3 and pH=5.5) at the temperature of 350C. Acetate buffer solution (mixture of CH3 COOH 0.2 M and CH3COONa 0.2 M) was used to obtain and maintain the required pH values. The adsorption kinetic curves of phenazone on the active carbon AC-K, determined from solutions with an initial concentration of 100 mg/l, were measured in the time interval between 5-300 minutes. It has been established that the adsorption process of phenazone is rather fast and the establishment of the adsorption equilibrium is reached after approx. 30-60 min of contacting/stirring, depending on the pH value. The degree of immobilization of phenazone on AC-K coal is significant, its value being about 90% (pH 3) - 95% (pH 5) of the total amount of adsorbate. The adsorption experiments were carried out in a thermostatic shaker by contacting a series of samples using constant masses of carbonic adsorbent (50 mg) with aqueous solutions of adsorbate (50 mL) with the initial concentration between 50-500 mg/l. The adsorption isotherms of Phenazone AC-K coal were determined after establishing equilibrium in the adsorbate/adsorbent systems at pH values 3 and 5.5 and temperature 350C. The phases were separated by filtration and the residual Phenazone was determined by UV-Vis spectroscopy. The obtained data shows a major dependence of the immobilization rate of phenazone on the pH value of the contact medium. It was determined that increasing the pH value from 3 to 5.5 increases the maximum adsorption value (am) of Phenazone on AC-K charcoal by more than 30%. Summarizing the preliminary results, it was found that, the rate and degree of immobilization of phenazone on AC-K coal indicates to an encouraging potential for its use for the removal of emergent contaminants from various water sources.