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Monitoring of biofilm development and physico-chemical changes of floating microplastics at the air-water interface
ID
Rozman, Ula
(
Author
),
ID
Filker, Sabine
(
Author
),
ID
Kalčíková, Gabriela
(
Author
)
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MD5: 09B93F299E56638C327CC3E207FE759D
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https://www.sciencedirect.com/science/article/pii/S0269749123001598
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Abstract
Microplastics in the aquatic environment serve as a habitat for microbial life, on which they can form biofilms. However, how the development of the biofilm alters the properties of floating microplastics that are at the air-water interface and, therefore, not fully submerged, is not well understood. In this context, an aging experiment was conducted to monitor biofilm formation and changes in physico-chemical properties of low-density polyethylene (floating) microplastics over time. The growth of the biofilm followed the typical bacterial/biofilm growth phases and reached about 30% of the total mass of the microplastics, while the concentration of extracellular polymeric substances within the biofilm remained stable. Presence of chlorophyll a and urease activity indicated presence of photosynthetic microorganisms within the biofilm which was also confirmed by analysis of the biofilm composition. Chemical characterization by FTIR showed the formation of additional functional groups attributed to the formed biofilm, and SEM imaging showed cracks on the surface of the aged microplastics, indicating incipient degradation of the polyethylene. Moreover, the adsorption capacity of the aged particles for metals (Pb(II)) was 52% higher compared to the pristine ones. Aging increased the density and size of the particles; however, it did not lead to the submersion of the aged particles even after 12 weeks of aging, suggesting that additional environmental processes may influence the transport of microplastics from the air-water interface into the water body.
Language:
English
Keywords:
microplastics
,
biofilm
,
aging
,
biodegradation
,
biofouling
,
polyethylene
,
microbeads
Work type:
Article
Typology:
1.01 - Original Scientific Article
Organization:
FKKT - Faculty of Chemistry and Chemical Technology
Publication status:
Published
Publication version:
Version of Record
Year:
2023
Number of pages:
9 str.
Numbering:
Vol. 322, art. 121157
PID:
20.500.12556/RUL-144337
UDC:
504.5: 678.742.2
ISSN on article:
0269-7491
DOI:
10.1016/j.envpol.2023.121157
COBISS.SI-ID:
140570371
Publication date in RUL:
15.02.2023
Views:
456
Downloads:
141
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Record is a part of a journal
Title:
Environmental pollution
Shortened title:
Environ. pollut.
Publisher:
Elsevier
ISSN:
0269-7491
COBISS.SI-ID:
25405184
Licences
License:
CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Link:
http://creativecommons.org/licenses/by-nc-nd/4.0/
Description:
The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.
Secondary language
Language:
Slovenian
Keywords:
mikroplastika
,
biofilm
,
staranje
,
biorazgradnja
,
razvoj biofilma
,
polietilen
Projects
Funder:
ARRS - Slovenian Research Agency
Project number:
P2-0191
Name:
Kemijsko inženirstvo
Funder:
ARRS - Slovenian Research Agency
Project number:
N2-0129
Name:
Interakcije mikroplastike s plavajočimi rastlinami
Funder:
ARRS - Slovenian Research Agency
Project number:
J2-2491
Name:
Vpliv mikroplastike na rastlinsko čistilno napravo
Funder:
Other - Other funder or multiple funders
Funding programme:
COST
Project number:
CA20101
Name:
Plastics monitoRIng detectiOn RemedIaTion recoverY
Acronym:
PRIORITY
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