## 1 Introduction
OH is essentially a molecule with one or more unpaired electrons, which makes it particularly reactive [24]. OH participates in the chemical process of decomposing a wide range of organic compounds through electron transport, electrophilic addition, dehydrogenation and other reactions, converting organic matter into easily biodegradable intermediates or directly mineralizing it into simple and harmless inorganic substances such as CO\({}_{2}\) and H\({}_{2}\)O. At present, the issue of protecting water resources from various types of pollution has become increasingly urgent. Additionally, there are growing organic contaminants of emerging concern including pharmaceuticals and personal care products, which have been detected in trace amounts in drinking water [24]. Additionally, the health impact of these organic contaminants in low concentration is not well understood. Various investigations on the use of APP technology for organic wastewater purification have already been performed now, and advancements are continuing to be made in this area. The application of plasma for water treatment can not be regarded as a new topic considering the intense research work carried out in the past few decades. In addition, the rapid growth of research on the use of plasma systems in wastewater treatment has prompted researchers to focus on the technical characteristics of these systems. As the number of available APP experimental studies increases, specialized thematic reviews need to be elucidated and summarized to facilitate the development of better technologies, and this fact has become evident in the use of plasma in water treatment. This article provides a detailed discussion of the plasma treatment of wastewater, and special attention was paid to the degradation of organic pollutants in wastewater treatment by plasma active ingredients. The current state of research on plasma degradation of organic pollutants is first described. Secondly, the application of various plasma-generating devices in wastewater treatment is discussed. The removal and degradation of various organic pollutants (pharmaceuticals, chemical reagents, pesticides, industrial dyes, viruses, etc.) from water by plasma are then discussed, along with the impact of various plasma discharge parameters on the effectiveness of wastewater treatment. Finally, the existing benefits and drawbacks of the plasma wastewater treatment process are summarized and forecasted. These findings presented herein lay the foundation for future improvements that can be implemented in the application of APP in water treatment. \begin{table}
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**Water Treatment Technology** & **Advantages** & **Disadvantages** & **Refs.** \\ \hline Conventional methods & & Unrestricted breakdown of products, low biodegradability of some pollutants, requirement of maintenance and management of microorganisms. & [28] \\ \hline Flocculation, coagulation, ion ex-change, filtration & Simple, no chemical reagents and no secondary pollution & High consumption of energy and reagents, low selectivity with high investment and operational costs. & [6,28] \\ \hline Thermal oxidation, boiling & High-efficiency & High running costs, emission of various dioxins and other pollutants into the environment. & [7] \\ \hline Modern oxidation processes & & & \\ \hline Photo-Fenton, photocatalysis, ozonation, ultrasonication & Simple, eco-friendly and economical & Lack of a complete oxidation process. & [2,5,14,17] \\ \hline \multirow{6}{*}{Atmospheric pressure plasma} & Does not rely on UV lamps and ex-pensive chemicals to produce reactive substances, emits light and shockwaves; high-efficiency, simple, eco-friendly, economical and easy-to-use technology & Energy output is unclear, small application scale. & [29,30] \\ \hline \hline \end{tabular}
\end{table} 
Table 1: Comparison of water treatment technologies. Figure 1: The composition of APP systems.