Sorption of endocrine disrupting compounds onto polyamide microplastics under different environmental conditions : Behaviour and mechanism
Lara, Larissa Zacher ; Bertoldi, Crislaine LU
; Alves, Nortom Munhoz
and Fernandes, Andreia Neves
(2021)
In Science of the Total Environment
796.
- Abstract
Microplastics of polyamide are commonly found in aquatic environments and might act as vectors of different contaminants such as endocrine disrupting compounds (EDC). Therefore, sorption of 17α-ethynylestradiol (EE2), 17β-estradiol (E2), and estriol (E3) on polyamide microplastics was studied under different simulated environments. The results suggest that the sorption process was affected by the presence of dissolved organic matter (DOM) and salinity, where both positive and negative effects were observed. Kinetics revealed that the process occurs through multiple steps wherever the sorption rate depicting the transportation of EDC molecules from the liquid phase to the solid boundary of the sorbent, is higher than the intraparticle... (More)
Microplastics of polyamide are commonly found in aquatic environments and might act as vectors of different contaminants such as endocrine disrupting compounds (EDC). Therefore, sorption of 17α-ethynylestradiol (EE2), 17β-estradiol (E2), and estriol (E3) on polyamide microplastics was studied under different simulated environments. The results suggest that the sorption process was affected by the presence of dissolved organic matter (DOM) and salinity, where both positive and negative effects were observed. Kinetics revealed that the process occurs through multiple steps wherever the sorption rate depicting the transportation of EDC molecules from the liquid phase to the solid boundary of the sorbent, is higher than the intraparticle and pore diffusion process. In addition, the sorption rate of E2 decreased with the increase of water matrix complexity from ultrapure water (UPW) > artificial seawater (ASW) > fulvic acid water (FAW) > artificial seawater with fulvic acid (AS/FAW), while the sorption rate of EE2 decreased from UPW > ASW > FAW and increased in the matrix combining salinity and organic matter (AS/FAW). On the contrary, the E3 sorption rate increased with matrix complexity, from UPW < ASW < FAW and decreased with the influence of salinity and organic matter combination (AS/FAW). The sorption capacity of the EDC reached maximum values of 82% for E2, 90% for EE2 and 56% for E3. Isotherms demonstrated the occurrence of multilayer sorption. A positive relationship has been found between the hydrophobicity of polyamide microplastics and the Log Kow of EDC, showing an important role of hydrophobic interactions in the sorption process under all the studied conditions. Moreover, hydrogen bonding and binding of contaminants and DOM to microplastics through bridges were also suggested. The results show that salinity and DOM can greatly influence the sorption and transportation of EDC in the aquatic environment and pose a risk to aquatic ecosystems.
(Less)
- author
- Lara, Larissa Zacher
; Bertoldi, Crislaine
LU
; Alves, Nortom Munhoz
and Fernandes, Andreia Neves
- publishing date
- 2021-11-20
- type
- Contribution to journal
- publication status
- published
- keywords
- Endocrine disrupting compounds, Environmental matrices, Hydrophobic interactions, Organic matter influence, Salinity effect
- in
- Science of the Total Environment
- volume
- 796
- article number
- 148983
- publisher
- Elsevier
- external identifiers
-
- scopus:85110621686
- pmid:34328888
- ISSN
- 0048-9697
- DOI
- 10.1016/j.scitotenv.2021.148983
- language
- English
- LU publication?
- no
- additional info
- Publisher Copyright: © 2021 Elsevier B.V.
- id
- c9a9df22-7894-4c27-97d0-26cccb0afd01
- date added to LUP
- 2024-07-02 09:15:10
- date last changed
- 2025-07-02 20:31:18
@article{c9a9df22-7894-4c27-97d0-26cccb0afd01,
abstract = {{<p>Microplastics of polyamide are commonly found in aquatic environments and might act as vectors of different contaminants such as endocrine disrupting compounds (EDC). Therefore, sorption of 17α-ethynylestradiol (EE2), 17β-estradiol (E2), and estriol (E3) on polyamide microplastics was studied under different simulated environments. The results suggest that the sorption process was affected by the presence of dissolved organic matter (DOM) and salinity, where both positive and negative effects were observed. Kinetics revealed that the process occurs through multiple steps wherever the sorption rate depicting the transportation of EDC molecules from the liquid phase to the solid boundary of the sorbent, is higher than the intraparticle and pore diffusion process. In addition, the sorption rate of E2 decreased with the increase of water matrix complexity from ultrapure water (UPW) > artificial seawater (ASW) > fulvic acid water (FAW) > artificial seawater with fulvic acid (AS/FAW), while the sorption rate of EE2 decreased from UPW > ASW > FAW and increased in the matrix combining salinity and organic matter (AS/FAW). On the contrary, the E3 sorption rate increased with matrix complexity, from UPW < ASW < FAW and decreased with the influence of salinity and organic matter combination (AS/FAW). The sorption capacity of the EDC reached maximum values of 82% for E2, 90% for EE2 and 56% for E3. Isotherms demonstrated the occurrence of multilayer sorption. A positive relationship has been found between the hydrophobicity of polyamide microplastics and the Log K<sub>ow</sub> of EDC, showing an important role of hydrophobic interactions in the sorption process under all the studied conditions. Moreover, hydrogen bonding and binding of contaminants and DOM to microplastics through bridges were also suggested. The results show that salinity and DOM can greatly influence the sorption and transportation of EDC in the aquatic environment and pose a risk to aquatic ecosystems.</p>}},
author = {{Lara, Larissa Zacher and Bertoldi, Crislaine and Alves, Nortom Munhoz and Fernandes, Andreia Neves}},
issn = {{0048-9697}},
keywords = {{Endocrine disrupting compounds; Environmental matrices; Hydrophobic interactions; Organic matter influence; Salinity effect}},
language = {{eng}},
month = {{11}},
publisher = {{Elsevier}},
series = {{Science of the Total Environment}},
title = {{Sorption of endocrine disrupting compounds onto polyamide microplastics under different environmental conditions : Behaviour and mechanism}},
url = {{http://dx.doi.org/10.1016/j.scitotenv.2021.148983}},
doi = {{10.1016/j.scitotenv.2021.148983}},
volume = {{796}},
year = {{2021}},
}