Adsorption of Tannic Acid and Macromolecular Humic/Fulvic Acid onto Polystyrene Microplastics: A Comparison Study
Dissolved organic matter (DOM) has been widely reported to influence the environmental behavior of microplastics (MPs), but little is known about the properties and mechanisms of interaction between specific DOM components and MPs. Here, we studied the adsorption of three representative DOM componen...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-07-01
|
| Series: | Water |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2073-4441/14/14/2201 |
| _version_ | 1797432958887395328 |
|---|---|
| author | Junsuo Li Shoucheng Ma Xinying Li Wei Wei |
| author_facet | Junsuo Li Shoucheng Ma Xinying Li Wei Wei |
| author_sort | Junsuo Li |
| collection | DOAJ |
| description | Dissolved organic matter (DOM) has been widely reported to influence the environmental behavior of microplastics (MPs), but little is known about the properties and mechanisms of interaction between specific DOM components and MPs. Here, we studied the adsorption of three representative DOM components (humic acid, HA; fulvic acid, FA; and tannic acid, TA) on polystyrene (PS) MPs in batch adsorption experiments. Results revealed that HA/FA adsorption was greater under acidic conditions, while higher TA adsorption on PS was found at pH 4 and 6. The divalent cation (Ca<sup>2+</sup>) exerted a more prominent role in enhancing HA, FA, and TA adsorption on PS than did monovalent ones (K<sup>+</sup> and Na<sup>+</sup>). The adsorption process fitted well with the Freundlich isotherm model and the pseudo-second-order kinetics model. The adsorption site heterogeneity was evaluated using the site energy distribution analysis based on the Freundlich model. The greater binding ability of HA on the PS surface caused a more negatively charged surface than FA/TA, as reflected by Zeta potential values. The findings of this study not only provide valuable information about the adsorption behavior and interaction processes of various DOM components on PS MPs, but also aid our efforts to evaluate the environmental behaviors of MPs. |
| first_indexed | 2024-03-09T10:10:13Z |
| format | Article |
| id | doaj.art-31957bbb38a442788badd9935cdbef46 |
| institution | Directory Open Access Journal |
| issn | 2073-4441 |
| language | English |
| last_indexed | 2024-03-09T10:10:13Z |
| publishDate | 2022-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Water |
| spelling | doaj.art-31957bbb38a442788badd9935cdbef462023-12-01T22:49:05ZengMDPI AGWater2073-44412022-07-011414220110.3390/w14142201Adsorption of Tannic Acid and Macromolecular Humic/Fulvic Acid onto Polystyrene Microplastics: A Comparison StudyJunsuo Li0Shoucheng Ma1Xinying Li2Wei Wei3School of Environment, Nanjing Normal University, Nanjing 210023, ChinaSchool of Environment, Nanjing Normal University, Nanjing 210023, ChinaSchool of Environment, Nanjing Normal University, Nanjing 210023, ChinaSchool of Environment, Nanjing Normal University, Nanjing 210023, ChinaDissolved organic matter (DOM) has been widely reported to influence the environmental behavior of microplastics (MPs), but little is known about the properties and mechanisms of interaction between specific DOM components and MPs. Here, we studied the adsorption of three representative DOM components (humic acid, HA; fulvic acid, FA; and tannic acid, TA) on polystyrene (PS) MPs in batch adsorption experiments. Results revealed that HA/FA adsorption was greater under acidic conditions, while higher TA adsorption on PS was found at pH 4 and 6. The divalent cation (Ca<sup>2+</sup>) exerted a more prominent role in enhancing HA, FA, and TA adsorption on PS than did monovalent ones (K<sup>+</sup> and Na<sup>+</sup>). The adsorption process fitted well with the Freundlich isotherm model and the pseudo-second-order kinetics model. The adsorption site heterogeneity was evaluated using the site energy distribution analysis based on the Freundlich model. The greater binding ability of HA on the PS surface caused a more negatively charged surface than FA/TA, as reflected by Zeta potential values. The findings of this study not only provide valuable information about the adsorption behavior and interaction processes of various DOM components on PS MPs, but also aid our efforts to evaluate the environmental behaviors of MPs.https://www.mdpi.com/2073-4441/14/14/2201microplasticsdissolved organic matteradsorption mechanismsite energy distribution |
| spellingShingle | Junsuo Li Shoucheng Ma Xinying Li Wei Wei Adsorption of Tannic Acid and Macromolecular Humic/Fulvic Acid onto Polystyrene Microplastics: A Comparison Study Water microplastics dissolved organic matter adsorption mechanism site energy distribution |
| title | Adsorption of Tannic Acid and Macromolecular Humic/Fulvic Acid onto Polystyrene Microplastics: A Comparison Study |
| title_full | Adsorption of Tannic Acid and Macromolecular Humic/Fulvic Acid onto Polystyrene Microplastics: A Comparison Study |
| title_fullStr | Adsorption of Tannic Acid and Macromolecular Humic/Fulvic Acid onto Polystyrene Microplastics: A Comparison Study |
| title_full_unstemmed | Adsorption of Tannic Acid and Macromolecular Humic/Fulvic Acid onto Polystyrene Microplastics: A Comparison Study |
| title_short | Adsorption of Tannic Acid and Macromolecular Humic/Fulvic Acid onto Polystyrene Microplastics: A Comparison Study |
| title_sort | adsorption of tannic acid and macromolecular humic fulvic acid onto polystyrene microplastics a comparison study |
| topic | microplastics dissolved organic matter adsorption mechanism site energy distribution |
| url | https://www.mdpi.com/2073-4441/14/14/2201 |
| work_keys_str_mv | AT junsuoli adsorptionoftannicacidandmacromolecularhumicfulvicacidontopolystyrenemicroplasticsacomparisonstudy AT shouchengma adsorptionoftannicacidandmacromolecularhumicfulvicacidontopolystyrenemicroplasticsacomparisonstudy AT xinyingli adsorptionoftannicacidandmacromolecularhumicfulvicacidontopolystyrenemicroplasticsacomparisonstudy AT weiwei adsorptionoftannicacidandmacromolecularhumicfulvicacidontopolystyrenemicroplasticsacomparisonstudy |