Green/sustainable strategy for the enhanced thermal destruction of abandoned, lost, discarded fishing gears (ALDFGs)

Dohee KWON, Dongho CHOI, Sungyup JUNG, Wei-Hsin CHEN, Yiu Fai TSANG, Seong-Jik PARK, In-Hyun NAM, Eilhann E. KWON

Research output: Contribution to journalArticlespeer-review

2 Citations (Scopus)

Abstract

One of the most prevalent wastes in the ocean is abandoned, lost, and discarded fishing gears (ALDFGs), which poses a potential mortality risk to all marine creatures. Considering the complex compositional nature and non-biodegradability, the thermal destruction of ALDFGs could offer a strategic measure to abate all hazardous potentials triggered by ALDFGs. More specifically, it is of paramount significance to completely break down ALDFGs into the smallest molecules such as syngas (H₂ and CO). Also, the conversion of ALDFGs into the smallest molecular units offer an innovative means for neutralizing toxic chemicals (that are inevitably generated from thermochemical process) given that toxicity is proportional to the degree of aromaticity/substitution of heteroatoms (S, N, Cl, etc.). To enhance the overall thermal destruction efficiency, carbon dioxide (CO₂) was used as a raw material. CO₂ was employed as the renewable resource for carbon and oxygen to enhance syngas formation. In detail, this study experimentally proved the mechanistic contribution of CO₂ to shifting carbon in wax-like/liquid hydrocarbons (HCs) into CO. The formation of CO from catalytic thermal destruction under CO₂ condition was 64 times more than from thermal destruction without catalyst under CO₂. Before the thermal destruction, the plastic types of ALDFGs (fishing rope (PP/PE), line (nylon 6), and net (PE)) were determined. Also, FT-IR analysis revealed that all plastics components in ALDFGs were partially oxidized. Copyright © 2023 Elsevier B.V. All rights reserved.
Original languageEnglish
Article number144426
JournalChemical Engineering Journal
Volume470
Early online dateJun 2023
DOIs
Publication statusPublished - Aug 2023

Citation

Kwon, D., Choi, D., Jung, S., Chen, W.-H., Tsang, Y. F., Park, S.-J., Nam, I.-H., & Kwon, E. E. (2023). Green/sustainable strategy for the enhanced thermal destruction of abandoned, lost, discarded fishing gears (ALDFGs). Chemical Engineering Journal, 470, Article 144426. https://doi.org/10.1016/j.cej.2023.144426

Keywords

  • Marine plastic debris
  • Ocean waste
  • Circular economy
  • Sustainability
  • Waste-to-energy
  • CO₂ utilization

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