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Methodologies to Assess the Biodegradability of Bio-Based Polymers—Current Knowledge and Existing Gaps
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This review assessed existing methodologies for testing the biodegradability of bio-based polymers, identifying gaps in current standards and emphasizing the need for updated legislation and testing guidelines to ensure bioplastics fully degrade without releasing hazardous compounds.
Our society lives in a time of transition where traditional petroleum-based polymers/plastics are being replaced by more sustainable alternative materials. To consider these bioproducts as more viable options than the actual ones, it is demanded to ensure that they are fully biodegradable or compostable and that there is no release of hazardous compounds to the environment with their degradation. It is then essential to adapt the legislation to support novel specific guidelines to test the biodegradability of each biopolymer in varied environments, and consequently, establish consistent data to design a coherent labeling system. This review work aims to point out the current standards that can serve as a basis for the characterization of biopolymers' biodegradation profile in different environments (soil, compost, and aquatic systems) and identify other laboratory methodologies that have been adopted for the same purpose. With the information gathered in this work, it was possible to identify remaining gaps in existing national and international standards to help establish new validation criteria to be introduced in future research and policies related to bioplastics to boost the sustainable progress of this rising industry.
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New advances to assess biodegradation and toxicity of alternative environmentally friendly polymers
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Researchers developed new methods to assess the biodegradation rates and ecotoxicity of alternative polymers including biobased, recycled, and biodegradable plastics, addressing a gap in risk assessment frameworks focused primarily on conventional plastics. Results showed biodegradability varied greatly by polymer type and environmental conditions, and alternative plastics still exhibited measurable toxicity during degradation.
Biodegradability of bioplastics in different aquatic environments: A systematic review
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This systematic review examines whether bioplastics actually break down in water as promised. The findings reveal wide variability in how well different bioplastics biodegrade in freshwater and saltwater, and current testing standards lack clear targets, meaning some materials marketed as biodegradable may still persist in the environment and contribute to microplastic pollution.
Biodegradation of plastics in the pelagic environment of the coastal zone – Proposed test method under controlled laboratory conditions
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This paper proposed a standardized test method for evaluating the biodegradation of bio-based plastics in the pelagic coastal zone environment, addressing the lack of suitable protocols for assessing marine biodegradability as an alternative to conventional non-degradable plastics.
Biodegradability standards for carrier bags and plastic films in aquatic environments: a critical review
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Researchers critically reviewed existing biodegradability standards for carrier bags and plastic films in aquatic environments and found that current testing protocols do not adequately reflect real-world marine or freshwater conditions. The study suggests that labeling plastics as "biodegradable" may be misleading, since degradation rates vary dramatically depending on temperature, oxygen levels, and microbial communities present in natural water bodies.
A Sustainable Approach to Plastics; Bioplastics
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This review examines bioplastics as a sustainable alternative to conventional plastics, comparing bio-based and biodegradable options against traditional plastics on environmental impact, biodegradability standards, and performance, finding that while bioplastics offer potential solutions to microplastic generation and soil toxicity, standardization and lifecycle assessment remain key challenges.
Research digests by email
When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.