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Biodegradable Microplastics: A Review on the Interaction with Pollutants and Influence to Organisms
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This review examines the environmental behavior and toxicity of biodegradable microplastics, noting that natural conditions rarely allow complete degradation and that biodegradable plastics may fragment into microplastics more rapidly than conventional plastics. Under some conditions biodegradable microplastics may pose greater risks to organisms than conventional microplastics, particularly in combination with adsorbed pollutants.
Biodegradable plastics attract public attention as promising substitutes for traditional nondegradable plastics which have caused the serious white pollution problem due to their persistence. However, even for biodegradable plastics, natual conditions for the rapid and complete degradation are rare. Even more serious is that biodegradable plastics might be disintegrated into microplastics more rapidly than tranditional plastics, emerging as another threat to the environment. Similar to traditional microplastics, biodegradable microplastics could adsorb many pollutants by various physicochemical effects and release additives. Biodegradable microplastics have been confirmed to be toxic to the organisms as particle matter and the vector as pollutants. Under some conditions, biodegradable microplastics may pose more severe negative impacts on the organisms. With the fierely increasing trend to replace the nondegradable plastic commodities with biodegradable ones, it is necessary to evaluate whether biodegradable plastics and the generated microplastics would alleviate plastic pollution or induce greater ecological impacts.
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Comparing environmental fate and ecotoxicity of conventional and biodegradable plastics: A critical review
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This review compares biodegradable and conventional plastics and finds that biodegradable plastics do not always fully break down under natural conditions -- instead they often fragment into microplastics and release chemical additives, similar to conventional plastics. Both types can absorb pollutants from the environment and cause toxic effects in living organisms, challenging the assumption that biodegradable plastics are a safe alternative.
A state-of-the-art review of environmental behavior and potential risks of biodegradable microplastics in soil ecosystems: Comparison with conventional microplastics
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This review compares the environmental behavior and risks of biodegradable microplastics with conventional microplastics in soil ecosystems. Researchers found that biodegradable microplastics fragment more readily and their abundant functional groups significantly affect how they transport and interact with other contaminants like heavy metals. The study suggests that biodegradable plastics may pose distinct and potentially underestimated risks to soil health compared to their conventional counterparts.
Biodegradable Microplastics: Environmental Fate and Persistence in Comparison to Micro- and Nanoplastics from Traditional, Non-Degradable Polymers
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This review compares biodegradable microplastics with traditional microplastics and finds that while biodegradable versions break down much faster, they still release microplastic-sized particles that can persist in the environment for varying periods. How quickly biodegradable microplastics actually disappear depends heavily on environmental conditions like temperature, moisture, and microbial activity, and lab results often overestimate real-world degradation. The takeaway is that switching to biodegradable plastics helps but does not fully solve the microplastic pollution problem.
Adsorption of organic pollutants on (degradable) microplastics and the influences on their bioavailability
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This study examined how organic pollutants adsorb onto both conventional and biodegradable microplastics, and how degradation of the plastic surface affects adsorption capacity over time. The results show that degradable plastics can also serve as vectors for organic pollutants, challenging the assumption that biodegradable alternatives are environmentally benign.
Research advances on the toxicity of biodegradable plastics derived micro/nanoplastics in the environment: A review
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This review finds that so-called biodegradable plastics may actually be more harmful than conventional plastics in some ways, since they break down into micro- and nanoplastics faster and can release toxic additives more readily. The findings challenge the assumption that biodegradable plastics are a safe alternative and suggest they may pose similar or even greater risks to ecosystems and, potentially, human health.
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