Sustainable struggling: decoding microplastic released from bioplastics-a critical review

Area of Science:

• Environmental Science
• Materials Science
• Ecotoxicology

Background:

• Plastic pollution is a global environmental crisis.
• Biodegradable plastics (BDPs) are proposed as sustainable alternatives.
• Concerns exist regarding the actual degradation and environmental impact of BDPs.

Purpose of the Study:

• To review the formation of microplastics (MPs) from BDPs.
• To assess the environmental impacts and adsorption capacities of BDP-derived MPs.
• To investigate the ecotoxicological effects of biodegradable MPs (BDMPs) on various species.

Main Methods:

• Literature review of scientific studies on BDPs and MPs.
• Analysis of degradation pathways and rates of BDPs in natural environments.
• Examination of research on the ecological effects of BDMPs on plants and animals.

Main Results:

• Many BDPs do not fully degrade under natural conditions.
• BDPs can fragment into MPs more rapidly than conventional plastics.
• Biodegradable MPs (BDMPs) may exhibit more detrimental and persistent effects than petroleum-based MPs.

Conclusions:

• Widespread commercial adoption of BDPs requires careful ecological risk assessment.
• BDMPs pose potential ecological threats that necessitate further scientific investigation.
• BDPs may not be a complete solution to plastic pollution without addressing MP formation and impacts.