## 1 Introduction  
The escalating concern surrounding emerging pollutants (EPs) in wastewater is primarily due to their substantial risks to human health and wildlife. In contemporary wastewater treatment plants (WWTPs), the persistence of EPs and pathogenic organisms in treated effluents highlights a critical challenge in maintaining the quality of aquatic bodies and ensuring the safety of reused water for humans, animals, and ecosystems [1, 2, 3]. Traditional treatment methodologies, such as the activated sludge process (secondary treatment) and tertiary processes, including filtration and disinfection, generally fail to effectively eliminate many EPs. These systems are primarily designed to remove conventional pollutants in compliance with existing regulatory standards; consequently, many EPs persist in aquatic ecosystems and reclaimed waters used for irrigation. Recently, substantial scientific efforts have been directed toward developing processes for the removal of EPs from water, employing various techniques such as adsorption, advanced oxidation processes, and photocatalytic methods, among others [4, 5, 6, 7, 8, 9, 10]. Many of these studies have been conducted on individual pollutants in the laboratory, and other efforts have been focused on the elimination of EPs in real wastewater scenarios, especially in urban WWTPs. Concerning industrial wastewater treatment plants (IWWTPs), they have not been as extensively studied; however, interest in them has recently increased [11, 12, 13].  
The line of research in which we have been working recently, the Life Clean Up project [14] (which employs a series of treatment stages including ultrafiltration, adsorption, photocatalysis, desorption, and pulsed light), presents a promising satisfactory result for removal micropollutants as pharmaceuticals, personal care products (PPCPs) and pesticides within urban water treatment settings [15; 16; 17; 18]. However, this technology is not suitable for industrial wastewater due to the limitation of the adsorption stage at the low concentrations of pesticides present in the effluent. Therefore, in this research work, we decided to consider a pesticide-removal system based solely on photocatalysis. For this purpose, previously developed heterogeneous photoactive polymeric materials were recovered and utilized [19; 20]. The heterogeneous photocatalysts were engineered as hydrophilic photoactive polymeric microparticles via the polymerization of p-chloromethylstyrene and p-divinylbenzene, followed by covalent functionalization with Rose Bengal and hydrophilic functional groups. These photoactive polymeric microparticles demonstrated efficient photocatalysts capable of generating singlet oxygen upon visible light irradiation and are fully recoverable and effective for subsequent reaction cycles. They have also demonstrated efficacy in photochemical oxidation reactions of 9,10-anthracenediproionic acid and 2-furoic acid [19], although not yet explored for the oxidation of EPs.  
In the field of photoactive micro- or nano-particles, numerous recent and impactful studies can be found in the literature investigating photodegradation and removal of contaminants in urban or industrial wastewater. Particularly noteworthy is the use of inorganic semiconductor materials such as TiO\({}_{2}\), Cu\({}_{2}\)O, and Fe\({}_{2}\)O\({}_{3}\)[21; 22; 23; 24; 25; 6; 26; 27; 28; 29; 30; 31; 32; 33; 34; 35; 36; 37;  
the singlet state of oxygen. The novelty of this research lies in the fact that, to date, no studies have been conducted on the removal of AHMPD from wastewater originating from urban or industrial WWTPs. However, its photocatalytic mechanism and reaction kinetics in water have been studied using unsupported RB as a photosensitizer [36; 37; 38].