## 4 Conclusions  
In this study, the influence of the pore-forming diluent and molar ratio of monomers on the structure, as well as the thermal and sorption properties of the DVB and GMA copolymers, obtained by suspension polymerization, were compared. As the pore-forming diluents, toluene and a mixture of decanol and benzyl alcohol were applied. The chemical structure of the obtained polymers was confirmed by the FTIR technique, and their \begin{table}
\begin{tabular}{c c c c c c} \hline \hline
**Adsorbents** & **S\({}_{\text{SET}}\) [m\({}^{2}\)g\({}^{-1}\)]** & **Co [mg/L]** & **q\({}_{\text{a}}\) [mg/g]** & **Recovery [\%]** & **Reference** \\ \hline Silica microspheres decorated with polydopamine & 612.3 & 200 & 83.8 & 81 & [39] \\ \hline Hyper-cross-linked hydroxylated polystyrene (HCPS-OH 4) & 69 & 482 & 293.9 & 92.2 & [40] \\ \hline Graphite oxide coated sand & Not reported & 50 & 0.4 & Not reported & [41] \\ \hline Eucalyptus sheathiana bark biomass & 6.55 & 50 & 30.7 & 46 & [42] \\ \hline Jackfruit (Artocarpus heteropyllus) leaf powder & Not reported & 100 & 245 & Not reported & [43] \\ \hline Zeolite & Not reported & 30 & 4.5 & Not reported & [44] \\ \hline Rise husk & Not reported & 50 & 6.63 & Not reported & [45] \\ \hline DVB-GMA 1:1 db & 0–500 & 1 & 0.2–5.73 & 0–42 & \\ \hline \hline \end{tabular}  
*—desorption agent.  
\end{table} 
Table 7: Efficiency of different sorbents in MB removal with dynamic method. chemical composition was confirmed with elemental analysis. The good agreement of the experimental and theoretical values of the CHN results proved the successful course of the syntheses. In order to determine the behavior of the tested polymers in oxidizing conditions and the course of their thermal degradation, thermogravimetric analysis was carried out both under synthetic air and a helium atmosphere. Based on the obtained results, it was found that regardless of the thermal decomposition conditions, the pore-forming diluent did not have a significant impact on the course of this process; however, the molar ratio of monomers played a significant role, as the thermal stability of the obtained polymers decreased with increasing GMA content. An analysis of the porous structure parameters allowed us to find that not only the chemical composition of the polymers but also the applied pore-forming system affected the porosity of synthetized polymers. As the DVB content increased relative to GMA, the specific surface area of the tested polymers increased. Higher values of specific surface area were observed for the systems obtained in toluene than for decanol-benzyl alcohol systems. Changes in porosity dictated by the composition of polymers and the used pore-forming solvents also translated into the sorption capacity of the tested materials towards methylene blue. Studies carried out using the dynamic sorption method showed that the polymers obtained with toluene were characterized by better abilities to remove MB from its aqueous solution than those prepared with the mixture of alcohols. The only exception was the DVB-GMA 1:1 db copolymer. The low effectiveness of desorption process was a consequence of the chemical reaction between the methylene blue molecules and the epoxy rings of GMA, leading to the irreversible bonding of dye to the surface of the polymers. Conceptualization. M.S. and M.P. ; methodology. M.S. ; software. M.S. and M.P. ; validation. M.S. and M.P. ; formal analysis. M.S. ; investigation. M.S. and M.P. ; resources. M.P. ; data curation. M.S. ; writing--original draft preparation. M.P. ; writing--review and editing. M.S. ; visualization. M.S. and M.P. ; supervision. M.S. ; project administration. M.S. All authors have read and agreed to the published version of the manuscript. Horizon-MSCA-2022-SE-01 Project: 101131382--CLEANWATER, 2024-2027. **Institutional Review Board Statement:** Not applicable. **Informed Consent Statement:** Not applicable.