## 4 Conclusions  
Plastic debris has become an integral part of the environment and could serve as a source of organic pollutants. The transportation of pollutants through different environments can be affected by MPs, and MPs could also affect the way pollutants express their toxicity towards aquatic organisms and humans. The widespread use of bioplastics in everyday life is leading to an increase in their environmental impact. Understanding the interactions between different MPs and organic pollutants is crucial. The findings in this study show that the fate and transport of specific CPs, PAHs and HBs can be significantly impacted by the presence of MPs and bioplastics in aquatic environments. Furthermore, this study performed an in-depth investigation on the adsorption properties of CPs on MPs under different environmental pH conditions. The obtained results of this study are helpful in terms of further our understanding of the interactions between MPs and CPs in different real environmental conditions. The water matrix's pH value affected most adsorption behaviors of CPs on all the selected types of MPs, and the highest degree of adsorption occurred at pH 7. Furthermore, the adsorption of the HBs and PAHs did not depend on changes in the pH value of the water matrix. Besides the pH value of the water matrix, sorbate's hydrophobicity was observed to have a significant impact on the adsorption affinity of the HBs and PAHs on the MPs, which is one of the factors that has to be taken into account. Therefore, the influence of different environmental parameters on the adsorption behavior of organic pollutants on the MPs is a potential direction for further research. The following supporting information can be downloaded at: [[https://www.mdpi.com/article/10.3390/app132312835/s1](https://www.mdpi.com/article/10.3390/app132312835/s1)]([https://www.mdpi.com/article/10.3390/app132312835/s1](https://www.mdpi.com/article/10.3390/app132312835/s1)), Figure S1: FTIR spectra of the selected microplastics used in the experiments: (a) PEp, (b) PE_PCPs_1, (c) PE_PCPs_2, (d) PEg, (e) PET, (f) PP and (g) PLA; Figure S2: SEM micrographs of (a) PEp, (b) PE_PCP_1 and (c) PE_PCP_2 microplastic particles; Figure S3: Point of zero charge for (a) PEp, (b) PE_PCPs_1, (c) PE_PCPs_2, (d) PEg, (e) PET, (f) PP and (g) PLA in distilled water and synthetic water matrix; Figure S4: Water matrix pH effect on adsorption affinity of (a) 4-CP, (b) 2,4-DCP, (c) 2,4-6-TCP and (d) PCP on microplastics (n = 2, mean value _ SD); Figure S5: Water matrix pH effect on adsorption affinity of (a) 1,2,3-TeCB, (b) 1,3,5-TeCB, (c) 1,2,4-TeCB, (d) PeCB, (e) HeCB and (f) TFL on microplastics (n = 2, mean value _ SD); Figure S6: Water matrix pH effect on adsorption affinity of (a) naphthalene, (b) fluorene, (c) fluoranthene and (d) PCP on microplastics (n = 2, mean value _ SD); Table S1: Specific surface area and pore size of microplastics obtained by BET analysis; Table S2: Physico-chemical properties of selected organic pollutants; Table S3: Physico-chemical characteristics of the synthetic water; Table S4: Mathematical models used for modelling data obtained in kinetic and adsorption experiments; Table S5: Kinetic model parameters for selected chlorinated phenols sorption on microplastics; Table S6: Calculated parameters with different isotherm models for the adsorption of chlorinated phenols on PEp, PE_PCPs_1, PE_PCPs_2, PEg, PE, PET, PP and PLA in water. References [69; 70; 71; 72; 73] are cited in Supplementary Materials file. **Author Contributions:** Conceptualization, M.V., J.A. and A.T.; Methodology, M.V. and A.T.; Software, M.V., J.N. and B.K. ; Investigation, M.V. and S.V. ; Resources, J.A. and A.T.; Writing--original draft, M.V. and A.T.; Writing--review and editing, M.V. and J.N. ; Visualization, M.V. and A.T.; Project administration, A.T.; Funding acquisition, J.A. and A.T. All authors have read and agreed to the published version of the manuscript.