Print Email Facebook Twitter Adsorption characteristics and mechanisms of water-soluble polymers (PVP and PEG) on kaolin and montmorillonite minerals Title Adsorption characteristics and mechanisms of water-soluble polymers (PVP and PEG) on kaolin and montmorillonite minerals Author Wang, Xintu (Guilin University of Technology; Chinese Academy of Sciences) Xu, Yanghui (TU Delft Sanitary Engineering; Chinese Academy of Sciences) Ou, Q. (TU Delft Sanitary Engineering; Chinese Academy of Sciences) Chen, Wenwen (Guilin University of Technology) van der Meer, W.G.J. (University of Twente; Oasen) Liu, G. (TU Delft Sanitary Engineering; Chinese Academy of Sciences; University of Chinese Academy of Sciences) Date 2024 Abstract The excessive use and accumulation of water-soluble polymers (WSPs, known as “liquid plastics”) in the environment can pose potential risks to both ecosystems and human health, but the environmental fate of WSPs remains unclear. Here, the adsorption behavior of WSPs with different molecular weight on kaolinite (Kaol) and montmorillonite (Mt) were examined. The results showed that the adsorption of PEG and PVP on minerals were controlled by hydrogen bond and van der Waals force. The Fourier transform infrared (FTIR) spectra and two-dimensional correlation spectroscopy (2D-COS) analysis revealed that there were interactions between the Al-O and Si-O groups of the minerals and the polar O- or N-containing functional groups as well as the alkyl groups of PEG and PVP. The adsorption characteristics of WSPs were closely related to their molecular weight and the pore size of minerals. Due to the relatively large mesopore size of Kaol, both PEG and PVP were absorbed into inner spaces, for which the adsorption capacity increased with molecular weight of the polymers. For Mt, all types of PEG could enter its micropores, while PVP with larger molecular weights appeared to be confined externally, leading to a decrease in the adsorption capacity of PVP with increasing molecular weight. The findings of this study provide a theoretical basis for scientific evaluation of environmental processes of WSPs. Subject AdsorptionHydrogen bondMineralsMolecular weightWater-soluble polymers To reference this document use: http://resolver.tudelft.nl/uuid:4b85c22f-4ed0-4fe1-a137-b064a60b0768 DOI https://doi.org/10.1016/j.jhazmat.2024.133592 ISSN 0304-3894 Source Journal of Hazardous Materials, 466 Part of collection Institutional Repository Document type journal article Rights © 2024 Xintu Wang, Yanghui Xu, Q. Ou, Wenwen Chen, W.G.J. van der Meer, G. Liu Files PDF 1-s2.0-S0304389424001717-main.pdf 6.71 MB Close viewer /islandora/object/uuid:4b85c22f-4ed0-4fe1-a137-b064a60b0768/datastream/OBJ/view