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Fenton aging significantly affects the heavy metal adsorption capacity of polystyrene microplastics
Abstract
Microplastics released into the environment undergo a variety of aging processes, however, information about the influence of aging on the adsorption behavior of microplastics is limited. In order to better understand the effect of aging polystyrene (PS) on the ability to adsorb heavy metal, H2O2 and Fenton reagent were used to investigate the aging properties of PS. Aging PS with these two different aging agents at pH = 4 and room temperature for the same time. Physical and chemical characterization indicated that aging caused oxidation of the surface of PS and the formation of surface micro-cracks. Based on the 2D-COS analysis, the aging process of PS functional groups could occur in the following sequence: 1375 (C-OH) > 1739 (C=O) > 1182 cm-1 (C-O-C) > 1716 (O-C=O). The adsorption experiments for Cd2+ with two different concentrations were carried out by PS with different aging time at room temperature. The adsorption data showed that the adsorption capacity of Cd2+ was significantly enhanced after aging compared with pristine PS, and the adsorption capacity of PS after Fenton aging treatment is much stronger than that after H2O2 aging treatment. The kinetic analysis of the adsorption data indicates that the adsorption process is more consistent with the second-order kinetics than the first-order kinetics, and it is further concluded that the adsorption of Cd2+ by PS is a relatively complicated process. According to the fitting results of adsorption isotherms, the adsorption process of pristine PS mainly occurs on the surface, but with the continuous aging, more adsorption sites may be exposed on the surface of PS, so it can be concluded that the adsorption mechanism of Cd2+ by PS is the coexistence of physics and chemistry. This study indicates aging microplastics may have a significant impact on the destination and migration of metal contaminants, which deserves to be further concerned.
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Citations
Cites
Characterisation of nanoplastics during the degradation of polystyrene
Lambert, S., & Wagner, M. (2016) · Chemosphere · doi:10.1016/j.chemosphere.2015.11.078 · Cited by 1,075
Jahnke, A., Arp, H. P. H., Escher, B. I., Gewert, B., Gorokhova, E., Kühnel, D., Ogonowski, M., Potthoff, A., Rummel, C., Schmitt-Jansen, M., et al. (2017) · Environmental Science & Technology Letters · doi:10.1021/acs.estlett.7b00008 · Cited by 580
Cited by
Adsorption behavior of organic pollutants on microplastics
Fu, L., Li, J., Wang, G., Luan, Y., & Dai, W. (2021) · Ecotoxicology and Environmental Safety · doi:10.1016/j.ecoenv.2021.112207 · Cited by 932
Luo, Z., Zhou, X., Su, Y., Wang, H., Yu, R., Zhou, S., Xu, E. G., & Xing, B. (2021) · Science of The Total Environment · doi:10.1016/j.scitotenv.2021.148902 · Cited by 314
Ni, Z., Tan, L., Wang, J., Chen, Y., Zhang, N., Meng, F., & Wang, J. (2023) · Science of The Total Environment · doi:10.1016/j.scitotenv.2022.159614 · Cited by 70
Hu, C., Xiao, Y., Jiang, Q., Wang, M., & Xue, T. (2024) · Environmental Science and Pollution Research · doi:10.1007/s11356-024-33131-1 · Cited by 16
“In the natural environment, UV irradiation, thermal radiation, physical wear, chemical oxidation and biodegradation can cause different degrees of aging of MPs (Lang et al. 2020; Liu et al. 2020; Wang et al. 2021c).”
Pan, K., Chen, C. C., Lin, L., Xu, H., Chen, F., Li, Y., Zhu, X., Ma, J., & Lan, W. (2022) · Bulletin of Environmental Contamination and Toxicology · doi:10.1007/s00128-022-03570-y · Cited by 14
Metadata
- Authors
- Lang, M., Yu, X., Liu, J., Xia, T., Wang, T., Jia, H., & Guo, X.
- Venue
- Science of The Total Environment
- Publisher
- Elsevier BV
- Published
- 2020-06
- Volume
- 722
- Pages
- 137762
- ISSN
- 0048-9697 (ISSN-L)
- OpenAlex
- W3011010914
- Cited by
- 358
- References
- 2
- FWCI
- 10.74
- Type
- journal article
- Language
- en
- Open access
- closed
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- Lang, M., Yu, X., Liu, J., Xia, T., Wang, T., Jia, H., & Guo, X. (2020). Fenton aging significantly affects the heavy metal adsorption capacity of polystyrene microplastics. Science of The Total Environment. https://doi.org/10.1016/j.scitotenv.2020.137762
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