## 3 Results and Discussion
### Morphology of Studied Polymers
\begin{table}
\begin{tabular}{c c c c c c} \hline \hline
**Pore-Forming Diluent** & **Polymer** & **q\({}_{\text{a}}\) [mg/g]** & \begin{tabular}{c} **Total Mass** \\ **Adsorbed [\%]** \\ \end{tabular} & \
\begin{tabular}{c} **Mass** \\ **Desorbed [\%]** \\ \end{tabular} &
\begin{tabular}{c} **Mass of MB Retained** \\ **on the Bed [\%]** \\ \end{tabular} \\ \hline \multirow{4}{*}{toluene} & pDVB t & 2.02 & 69.43 & 6.53 & 93.47 \\  & DVB-GMA 2:1 t & 2.25 & 69.53 & 2.04 & 97.07 \\  & DVB-GMA 1:1 t & 1.37 & 72.11 & 4.18 & 95.82 \\  & DVB-GMA 1:2 t & 0.26 & 89.61 & 0.79 & 99.21 \\ \hline \multirow{4}{*}{Decanol and benzyl alcohol} & pDVB db & 1.51 & 63.08 & 42.53 & 57.47 \\  & DVB-GMA 2:1 db & 0.39 & 91.71 & 1.16 & 98.84 \\ \cline{1-1}  & DVB-GMA 1:1 db & 5.73 & 31.77 & 32.02 & 67.98 \\ \cline{1-1}  & DVB-GMA 1:2 db & 0.2 & 94.01 & 0.35 & 99.65 \\ \hline \hline \end{tabular}
\end{table} 
Table 6: The sorption capacity q\({}_{\text{a}}\) and percentage adsorption and desorption efficiency. more attention. The desorption from pDVB db with wider PSD is more effective than from pDVB t, which has less macropores in its structure. This observation lead to the conclusion that most of the large MB molecules adsorbed on pDVB t are trapped in its narrow pores, while the more spacious structure of pDVB db allows for easier removal of the adsorbates from the surface. In order to compare the sorption capacity towards methylene blue of the studied polymers with other materials, some results of the dynamic sorption tests of MB reported in the literature are presented in Table 7.  
In the literature, a variety of materials were tested as potential sorbents for the removal of MB, among them, modified silica, carbon derivatives, natural origin materials, mineral and polymeric sorbents are discussed. These materials possess specific characteristics regarding physical and chemical properties, that consequently result in different affinities towards potential adsorbates. Sorption properties are additionally affected by experimental conditions, e.g., solution concentration, the mass of sorbents, the interaction time, temperature, pH. Therefore, a reliable comparison, even with such a value as q\({}_{\text{a}}\), is very demanding. In Table 7, sorption capacity is in range of 0.2-294 mg/g and recoveries 0-92 % for sorbents, from non-porous to such with very well developed porosity. The highest values of q\({}_{\text{a}}\) were obtained for materials with numerous hydroxyl groups on their surface. Other materials which did not have the confirmed presence of hydroxyl groups on their surface were not so effective. The values of the recoveries depend on the used desorption agents. The most effective was the 1 M methanolic solution of HCl, while aqueous 0.1 M HCl or NaOH and pure methanol did not exhibit a comparable effect in MB removal. Such results confirm that the mechanism of MB interactions with an adsorbent surface mainly involve chemical bonding. Although the values of q\({}_{\text{a}}\) for the polymers presented in these studies are not as high as those from the literature, the total mass of MB adsorbed on their surfaces in most cases is at the level of 70% or higher, which proves their good efficiency as adsorbents. Moreover, the amounts of MB retained on the beds are also high in all cases (57-100%), demonstrating that the dye is mainly chemically bound.