Contrasting effects of microplastic aging upon the adsorption of sulfonamides and its mechanism
| Autor: | Xiaoming Zou, Zhangsong Jiang, Liangliang Huang, Shifan Zhou, Yuxing Fan |
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| Rok vydání: | 2022 |
| Předmět: |
congenital
hereditary and neonatal diseases and abnormalities Chemistry General Chemical Engineering Significant difference nutritional and metabolic diseases General Chemistry Industrial and Manufacturing Engineering chemistry.chemical_compound Adsorption Environmental Chemistry Surface charge skin and connective tissue diseases Hydrogen peroxide Nuclear chemistry |
| Zdroj: | Chemical Engineering Journal. 430:132939 |
| ISSN: | 1385-8947 |
| DOI: | 10.1016/j.cej.2021.132939 |
| Popis: | The aging behavior of microplastics (MPs) is unavoidable in the natural environment, but the mechanisms underlying the differences in MP aging affecting the adsorption performance of different MPs remain unclear. In this work, the adsorption characteristics of sulfonamides (SAs) on virgin MPs (thermoplastic polyurethanes (TPUs), polyamides (PAs)) and aged MPs were determined under simulated conditions (ultraviolet (UV), ultraviolet combined hydrogen peroxide (UV + H2O2)). Contrasting effects of MP aging on SA adsorption were observed. That is, the adsorption capacities of aged PAs were decreased from 14.45% to 58.53%, whereas those of aged TPUs were increased from 13.93% to 171.30%. To interpret this interesting phenomenon, the structural characteristics of the tested MPs were determined, and the results indicated that the surface structures of MPs changed with aging, which resulted in differences in hydrophobicity and surface charge and a significant difference in the concentrations of oxygen-containing functional groups (P |
| Databáze: | OpenAIRE |
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