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Updated: Aug 11, 2026
09:39
A Platform of Anti-biofilm Assays Suited to the Exploration of Natural Compound Libraries
Published on: December 27, 2016
Additives in microplastics shape biofilm composition during aging and favour antibiotic-resistant microorganisms
Barbara Klun1, Živa Zidar2, Anja Klančnik2
1Faculty of Chemistry and Chemical Technology, University of Ljubljana, Večna pot 113, 1000 Ljubljana, Slovenia.
Environmental Pollution (Barking, Essex : 1987)
|August 4, 2026
Summary
Plastic additives like benzophenone-3 (BP-3) accelerate microplastic degradation and alter freshwater biofilms. This study shows additives impact microplastic stability and microbial communities, affecting environmental persistence.
Area of Science:
- Environmental Science
- Polymer Science
- Microbiology
Background:
- Microplastics pose environmental risks, with additives influencing their behavior.
- Benzophenone-3 (BP-3) and calcium carbonate are common polyethylene microplastic additives.
Purpose of the Study:
- To investigate the effects of BP-3 and calcium carbonate on polyethylene microplastic aging and biofilm formation in freshwater.
- To understand how these additives alter microplastic surface properties and microbial community composition.
Main Methods:
- Aging experiments on polyethylene microplastics with and without additives.
- Analysis of microplastic physical properties (density, crystallinity).
- Biofilm colonization assessment and microbial community profiling (16S rRNA sequencing).
- Detection of antibiotic resistance genes.
Main Results:
- Additives altered polyethylene density and crystallinity, leading to faster surface degradation (pits, cracks).
- Biofilm formation and extracellular polymeric substances were suppressed.
- Microbial communities shifted from cyanobacteria to heterotrophic taxa, with enriched antibiotic resistance genes.
- Microbial degradation activity was inhibited despite genetic potential.
Conclusions:
- Polyethylene microplastics with BP-3 and calcium carbonate filler exhibit reduced stability and altered biofilm composition.
- Additives significantly impact microplastic environmental persistence and ecological effects.
- Considering additives is crucial for accurate microplastic risk assessment.
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