{"title":"传统微塑料和可生物降解微塑料在天然水中老化后对 4-壬基苯酚吸附能力的比较。","authors":"Fallon Nacaratte, Anahi Valdivia, Sylvia V Copaja","doi":"10.1016/j.jconhyd.2024.104486","DOIUrl":null,"url":null,"abstract":"<p><p>This study investigated the adsorption of 4-Nonylphenol (4-NP) on aged microplastics (MPs) composed of polyethylene terephthalate (PET) and poly(butylene-adipate-co-terephthalate)/polylactic acid (PBAT/PLA). Morphological analysis revealed wear, wrinkles, and increased surface roughness in both aged MPs, with X-ray diffraction showing slight increases in crystallinity. Infrared spectroscopy showed an increase in the carbonyl index from 2.78 to 4.37 for PBAT/PLA and 0.51 to 2.32 for PET after aging. The natural water from the San Pedro River in Chile Atacama region (5.91 mS·cm<sup>-1</sup> conductivity, 3.25 PSU salinity, 2955 mg·L<sup>-1</sup> total dissolved solids, 435 mg·L<sup>-1</sup> CaCO<sub>3</sub> hardness) was used as the environmental medium and compared with a 0.01 mol·L<sup>-1</sup> CaCl<sub>2</sub> as a model solution. Kinetic modeling showed a decrease in 4-NP percentage removal from 90.0 % (2277 μg∙g<sup>-1</sup> adsorption capacity) to 50.2 % (1268 μg∙g<sup>-1</sup>) for PET and from 86.8 % (2087 μg∙g<sup>-1</sup>) to 70.3 % (1955 μg∙g<sup>-1</sup>) for PBAT/PLA when comparing the model solution to natural water, with 30 and 84 h equilibrium times, respectively. Isotherm data showed that 4-NP/PET fits BET n-layer and Temkin models, while 4-NP-PBAT/PLA fits the Toth and Hill models The ionic composition of natural water induces cation attraction to polarized MPs surfaces, intensifying competition for adsorption sites. This involves ion and molecular cooperation, 4-NP reorientation, external diffusion effects, and surface oxidation variations, which are attributed to explaining the bilayer (PET) and monolayer (PBAT/PLA) formation. This work contributes to understanding MP pollution and the importance of considering the bioplastics life cycle, since their waste presents significant potential to resist external factors for transporting contaminants.</p>","PeriodicalId":15530,"journal":{"name":"Journal of contaminant hydrology","volume":"269 ","pages":"104486"},"PeriodicalIF":3.5000,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Comparison of adsorption capacity of 4-Nonylphenol on conventional and biodegradable microplastics aged under natural water.\",\"authors\":\"Fallon Nacaratte, Anahi Valdivia, Sylvia V Copaja\",\"doi\":\"10.1016/j.jconhyd.2024.104486\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><p>This study investigated the adsorption of 4-Nonylphenol (4-NP) on aged microplastics (MPs) composed of polyethylene terephthalate (PET) and poly(butylene-adipate-co-terephthalate)/polylactic acid (PBAT/PLA). Morphological analysis revealed wear, wrinkles, and increased surface roughness in both aged MPs, with X-ray diffraction showing slight increases in crystallinity. Infrared spectroscopy showed an increase in the carbonyl index from 2.78 to 4.37 for PBAT/PLA and 0.51 to 2.32 for PET after aging. The natural water from the San Pedro River in Chile Atacama region (5.91 mS·cm<sup>-1</sup> conductivity, 3.25 PSU salinity, 2955 mg·L<sup>-1</sup> total dissolved solids, 435 mg·L<sup>-1</sup> CaCO<sub>3</sub> hardness) was used as the environmental medium and compared with a 0.01 mol·L<sup>-1</sup> CaCl<sub>2</sub> as a model solution. Kinetic modeling showed a decrease in 4-NP percentage removal from 90.0 % (2277 μg∙g<sup>-1</sup> adsorption capacity) to 50.2 % (1268 μg∙g<sup>-1</sup>) for PET and from 86.8 % (2087 μg∙g<sup>-1</sup>) to 70.3 % (1955 μg∙g<sup>-1</sup>) for PBAT/PLA when comparing the model solution to natural water, with 30 and 84 h equilibrium times, respectively. Isotherm data showed that 4-NP/PET fits BET n-layer and Temkin models, while 4-NP-PBAT/PLA fits the Toth and Hill models The ionic composition of natural water induces cation attraction to polarized MPs surfaces, intensifying competition for adsorption sites. This involves ion and molecular cooperation, 4-NP reorientation, external diffusion effects, and surface oxidation variations, which are attributed to explaining the bilayer (PET) and monolayer (PBAT/PLA) formation. This work contributes to understanding MP pollution and the importance of considering the bioplastics life cycle, since their waste presents significant potential to resist external factors for transporting contaminants.</p>\",\"PeriodicalId\":15530,\"journal\":{\"name\":\"Journal of contaminant hydrology\",\"volume\":\"269 \",\"pages\":\"104486\"},\"PeriodicalIF\":3.5000,\"publicationDate\":\"2024-12-09\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of contaminant hydrology\",\"FirstCategoryId\":\"93\",\"ListUrlMain\":\"https://doi.org/10.1016/j.jconhyd.2024.104486\",\"RegionNum\":3,\"RegionCategory\":\"环境科学与生态学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"ENVIRONMENTAL SCIENCES\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of contaminant hydrology","FirstCategoryId":"93","ListUrlMain":"https://doi.org/10.1016/j.jconhyd.2024.104486","RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENVIRONMENTAL SCIENCES","Score":null,"Total":0}
Comparison of adsorption capacity of 4-Nonylphenol on conventional and biodegradable microplastics aged under natural water.
This study investigated the adsorption of 4-Nonylphenol (4-NP) on aged microplastics (MPs) composed of polyethylene terephthalate (PET) and poly(butylene-adipate-co-terephthalate)/polylactic acid (PBAT/PLA). Morphological analysis revealed wear, wrinkles, and increased surface roughness in both aged MPs, with X-ray diffraction showing slight increases in crystallinity. Infrared spectroscopy showed an increase in the carbonyl index from 2.78 to 4.37 for PBAT/PLA and 0.51 to 2.32 for PET after aging. The natural water from the San Pedro River in Chile Atacama region (5.91 mS·cm-1 conductivity, 3.25 PSU salinity, 2955 mg·L-1 total dissolved solids, 435 mg·L-1 CaCO3 hardness) was used as the environmental medium and compared with a 0.01 mol·L-1 CaCl2 as a model solution. Kinetic modeling showed a decrease in 4-NP percentage removal from 90.0 % (2277 μg∙g-1 adsorption capacity) to 50.2 % (1268 μg∙g-1) for PET and from 86.8 % (2087 μg∙g-1) to 70.3 % (1955 μg∙g-1) for PBAT/PLA when comparing the model solution to natural water, with 30 and 84 h equilibrium times, respectively. Isotherm data showed that 4-NP/PET fits BET n-layer and Temkin models, while 4-NP-PBAT/PLA fits the Toth and Hill models The ionic composition of natural water induces cation attraction to polarized MPs surfaces, intensifying competition for adsorption sites. This involves ion and molecular cooperation, 4-NP reorientation, external diffusion effects, and surface oxidation variations, which are attributed to explaining the bilayer (PET) and monolayer (PBAT/PLA) formation. This work contributes to understanding MP pollution and the importance of considering the bioplastics life cycle, since their waste presents significant potential to resist external factors for transporting contaminants.
期刊介绍：
The Journal of Contaminant Hydrology is an international journal publishing scientific articles pertaining to the contamination of subsurface water resources. Emphasis is placed on investigations of the physical, chemical, and biological processes influencing the behavior and fate of organic and inorganic contaminants in the unsaturated (vadose) and saturated (groundwater) zones, as well as at groundwater-surface water interfaces. The ecological impacts of contaminants transported both from and to aquifers are of interest. Articles on contamination of surface water only, without a link to groundwater, are out of the scope. Broad latitude is allowed in identifying contaminants of interest, and include legacy and emerging pollutants, nutrients, nanoparticles, pathogenic microorganisms (e.g., bacteria, viruses, protozoa), microplastics, and various constituents associated with energy production (e.g., methane, carbon dioxide, hydrogen sulfide).
The journal''s scope embraces a wide range of topics including: experimental investigations of contaminant sorption, diffusion, transformation, volatilization and transport in the surface and subsurface; characterization of soil and aquifer properties only as they influence contaminant behavior; development and testing of mathematical models of contaminant behaviour; innovative techniques for restoration of contaminated sites; development of new tools or techniques for monitoring the extent of soil and groundwater contamination; transformation of contaminants in the hyporheic zone; effects of contaminants traversing the hyporheic zone on surface water and groundwater ecosystems; subsurface carbon sequestration and/or turnover; and migration of fluids associated with energy production into groundwater.
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