## 3 Results and Discussion
### Sorption Abilities Tests
#### 3.4.1 The Sorption of the Phenols Mixture
It is noteworthy that for Lo-DVB and Ro-DVB sorbents, the difference in the affinity of 2-ChP and 2,4,6-TChP to their surface was much more strongly pronounced. For most of the results, the recoveries for 2-ChP were approximately 50% lower than those for 2,4,6-TChP. However, this was not a result of the reduced sorption of 2-ChP on these polymers, but an increased affinity of 2,4,6-TChP towards their surfaces. This became more clear when the recovery values of 2,4,6-TChP with 2,4-DChP are compared. In this series of studies, they were on a similar or slightly lower level. To elucidate this observation, attention should also be paid to the chemical properties of the studied polymers. One of the factors that describe the acid properties of polymers is the acid value, which is shown in Table 3 and discussed in Section 3.1. The AVs for the terpene polymers were low, while those for the oil-based polymers were significantly higher. If a polymer having acidic groups is in a solution, such moieties will affect its acid-base balance. Even a slight increase in the concentration of hydrogen ions in the solution shifts the state of the dissociation equilibrium of 2,4,6-TChP towards the undissociated form, which is adsorbed to a greater extent than the ionic form. This is reflected by the presented results and schematically shown in Figure 9. For simplicity, the figure shows only 2,4,6-TChP molecules (with the lowest pKa value among the phenols), for which these processes are of the greatest importance in explaining the obtained results. As shown in Figure 9, the sorption process of the chlorophenols was supported by the possibility of the formation of hydrogen bonds between the substituents in the phenol aromatic ring and the surface functional groups of the polymer. \begin{table} \begin{tabular}{c c c c c c c c c c} \hline \hline
**Compound** & **Phenol** & **2-ChP** & **2,4-DChP** & **2,4,6-TChP** & **Salicylic Acid** & **Aspirin** & **Ibuprofen** & **Paracetamol** & **Ampicillin** \\ \hline logP & 1.46 & 2.15 & 3.06 & 3.69 & 2.26 & 1.19 & 3.97 & 0.46 & 0.93 \\ swater & 84 & 28.5 & 4.5 & 0.85 & 2 & 2.5 \({}^{\text{a}}\) & 0.021 \({}^{\text{b}}\) & 14 & 50 \\ [g-L\({}^{-1}\)] & 9.99 & 8.56 & 7.89 & 6.23 & 2.98; 13.6 \({}^{\text{c}}\) & 3.49 & 4.45 & 9.38 & 2.8; 8.42 \({}^{\text{d}}\) \\ \hline \hline \end{tabular} \begin{tabular}{c c c c c c c c} \hline \hline
**Type** & **P1** & **P2** & **P3** & **P4** & **P5** & **P6** \\ \hline logP & 1.46 & 2.15 & 3.06 & 3.69 & 2.26 & 1.19 & 3.97 & 0.46 & 0.93 \\ swater & 84 & 28.5 & 4.5 & 0.85 & 2 & 2.5 \({}^{\text{a}}\) & 0.021 \({}^{\text{b}}\) & 14 & 50 \\ [g-L\({}^{-1}\)] & 9.99 & 8.56 & 7.89 & 6.23 & 2.98; 13.6 \({}^{\text{c}}\) & 3.49 & 4.45 & 9.38 & 2.8; 8.42 \({}^{\text{d}}\) \\ \hline \hline \end{tabular}   
\begin{tabular}{c c c c c c c c} \hline \hline
**Type** & **P3** & **P4** & **P5** & **P6** \\ \hline logP & 1.46 & 2.15 & 3.06 & 3.69 & 2.26 & 1.19 & 3.97 & 0.46 & 0.93 \\ swater & 84 & 28.5 & 4.5 & 0.85 & 2 & 2.5 \({}^{\text{a}}\) & 0.021 \({}^{\text{b}}\) & 14 & 50 \\ [g-LHowever, the most important role in this uptake process was played by the Van der Waals interactions as well as the \(\pi\) electron interactions between the aromatic rings of the sorptives and the rings of the polymer cross-linker (divinylbenzene).