## 4 Conclusions  
Water-dispersible photoactive polymeric microparticles were employed in this study as heterogenous photocatalysts in the degradation of the pesticide Acetamiprid in IWWTP wastewater effluents. The designed polymers are active for the photocatalytic degradation of Acetamiprid under mildly basic and basic pH conditions. In all cases, employing polymers P2-P4 across various pH levels, both with laboratory samples and real effluent samples from IWWTP wastewater, the degradation kinetics of Acetamiprid exhibited first-order behavior. P3 and P4 materials allowed us to attain higher photochemical conversions than P2 materials, demonstrating that Acetamiprid degradation rates exceed 99% in basic media after 300 min of reaction and that degradation rates reach above 90-95% at the natural pH of wastewater effluents. The new polymers are capable of maintaining their catalytic activity for more than 10 cycles in an aqueous solution. The direct solar removal of Acetamiprid from industrial wastewater is feasible but constrained by the availability of effective sunlight hours, which is not sufficient during 4-5 months of the year. Future work should focus on optimizing the polymer matrix to enhance reaction kinetics under simulated sunlight conditions. The kinetics observed in this study are slower than those described in the literature for traditional Fenton and photo-Fenton methods under acidic pH conditions. However, the successfully developed method describes an alternative to Fenton and photo-Fenton approaches for the removal of Acetamiprid at the effluent's natural pH, which is noteworthy as very high Acetamiprid removal rates are achieved. The photoactive materials demonstrate faster kinetics with the chemical structure of Acetamiprid than with the pyrimidine structure of AHMPD, as studied earlier. This comparison will provide insights into the general applicability and efficiency of RB-supported polymers in the degradation of various types of contaminants and other photo-transformations of environmental value. Further work will examine the use of the improved polymeric systems, as described herein, to evaluate their performance in the degradation of additional EPs structures; additionally, future research will explore the structural modifications of the polymeric materials to extend maximum efficiency to neutral pH and enhance the reaction kinetics in direct solar irradiation. The following supporting information can be downloaded at: [[https://www.mdpi.com/article/10.3390/physchem5010009/s1](https://www.mdpi.com/article/10.3390/physchem5010009/s1)]([https://www.mdpi.com/article/10.3390/physchem5010009/s1](https://www.mdpi.com/article/10.3390/physchem5010009/s1)). Characterization data of P1-P4 microparticles: characterization of P1-P4 by thermogravimetric analysis: TGA P1-P4; legend: black curve represents the percentage of weight loss as a function of temperature, while the blue curve (TGA curve) indicates the percentage of weight loss over time, the red curve (DTG curve) displays the first derivative of the TGA curve, showing the rate of weight loss with respect to temperature; characterization of P1-P4 polymers by FT-Raman and FT-IR spectroscopy: spectroscopy P1, spectroscopy P2, spectroscopy P3, and spectroscopy P4; legend for FT-Raman: Raman intensity in arbitrary units as a function of frequency (cm\({}^{-1}\)); legend for FT-IR: percentage transmittance (%T) as a function of frequency (cm\({}^{-1}\)). This research was funded by the Spanish Ministry of Science and Innovation through the State Investigation Agency via the Torres Quevedo industrial postdoctoral program PTQ2020-011517. Data Availability Statement: Data are contained within the article. The author wishes to express their gratitude to their PhD thesis supervisors at the Universitat Jaume I for their mentorship in the design of polymeric photoactive materials.