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Peer Review Report For: Deep geological disposal of plastic waste: Pros and cons [version 2; peer review: 1 approved, 1 approved with reservations, 2 not approved]
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This is a peer review report for a proposal to bury non-recyclable plastic waste deep underground in abandoned mines and geological formations, rather than landfilling it where it can fragment into microplastics and leach into ecosystems. The peer reviewers offer mixed assessments — one approving, one conditionally approving, two not approving — reflecting ongoing debate about whether deep geological disposal is a practical complement to conventional plastic waste management.
Plastic waste accumulation is a global environmental issue. Current methods (recycling, incineration, landfilling, etc.) are not a sustainable long-term solution and so far they cannot prevent continuous accumulation of plastic waste worldwide. This article introduces the concept of deep geological disposal (DGD) of plastic waste as an alternative strategy. The concept principally differs from the traditional landfilling. In the latter, plastic waste is affected by chemical, physical, and microbial factors that cause plastic fragmentation and environmental leakage. On the contrary, DGD isolates plastic waste in abandoned mines, quarries and caves, ensuring safe long-term containment of the waste and the possibility of its reuse as a raw material in the future. Another advantage of DGD is that these geological structures usually have transport infrastructure and storage facilities, and, as a result, they offer a more controlled environment with reduced risk of leachate, microplastic dispersion, and surface pollution. The paper discusses the practical, economic, and environmental aspects of the concept of DGD of plastic waste. The proposal does not offer to replace other available mechanisms of plastic waste management, it presents DGD as a complementary and potentially effective method for addressing non-recyclable and mismanaged plastic waste worldwide.
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Peer Review Report For: Deep geological disposal of plastic waste: Pros and cons [version 2; peer review: 1 approved, 2 not approved]
AI summary Read the abstract
This is a second peer review report for the same deep geological disposal concept (burying plastic waste in abandoned mines to prevent microplastic generation), with two of four reviewers declining to approve the proposal. The ongoing scientific debate captured in these peer reviews reflects genuine uncertainty about whether underground plastic burial is safe, scalable, and environmentally preferable to surface management approaches.
Deep geological disposal of plastic waste: Pros and cons
AI summary Read the abstract
One radical proposal for dealing with non-recyclable plastic waste is to bury it deep underground in abandoned mines and geological formations — permanently isolating it from the surface environment. This paper argues that "deep geological disposal" could prevent the fragmentation and leaching that occurs in conventional landfills, where plastic breaks down into microplastics and chemicals that escape into soil and water. While not a replacement for recycling, the concept is presented as a complementary strategy for managing the plastic waste that current systems simply cannot handle.
Deep geological disposal of plastic waste: Pros and cons
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This paper proposes deep geological disposal — storing plastic waste in abandoned mines, quarries, and caves — as an alternative to recycling, incineration, and landfilling, arguing it would prevent the fragmentation of plastics into microplastics and contain chemical leaching while preserving plastic as a future raw material. While not a microplastic study itself, it is directly relevant as it addresses the root cause of microplastic generation by proposing a containment strategy that would stop plastic from breaking down in the environment.
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