Abstract
Plasma, next to solids, liquids and gases, is considered the fourth state of matter, occurring in the ground state or in the excited state, having a neutral charge. Its scope of application is wide and constantly expanding. The conducted research aimed to determine the impact of atmospheric plasma for removing selected pharmaceuticals: diclofenac (DFC), sulfamethoxazole (SMX), trimethoprim (TMP), carbamazepine (CBZ) and caffeine (CAF) from water on a laboratory scale. The concentration of the tested pharmaceuticals was 20 mg/L. The analyzed samples were exposed to a continuous stream of cold plasma. The contact time of the sample with the plasma stream ranged from seconds to minutes - depending on the tested pharmaceutical. By examining the degree of reduction of selected pharmaceutical substances before and after the atmospheric plasma treatment process, the samples were subjected to high-performance liquid chromatography analysis. The removal efficiency of individual pharmaceuticals reached up to 98 %. The conducted research confirms the great application potential of using atmospheric plasma as a tool for the elimination of individual pharmaceutical compounds. Cold plasma can be used as a potential tool in water purification and wastewater treatment. Based on the effects of free radical oxidation, UV radiation and pyrolysis, we can eliminate dangerous micropollutants in a more economical and effective way.
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