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Le Gué L, Savina E, Arhant M, Davies P, Dumergue N, Vincent B. Influence of knot strength on the mechanical performance of a biodegradable gillnet. Sci Rep 2024; 14:15450. [PMID: 38965403 PMCID: PMC11224365 DOI: 10.1038/s41598-024-66474-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2024] [Accepted: 07/01/2024] [Indexed: 07/06/2024] Open
Abstract
Ghost fishing is a global issue that can be addressed using fishing gear materials that do not persist in the marine environment. However, for these alternatives to be widely adopted, they must meet the same mechanical specifications as current commercial materials while degrading without any negative impact. The objective of this study was to compare a conventional gillnet made of polyamide 6 (PA6) with an alternative made of poly(butylene succinate-co-adipate-co-terephthalate) (PBSAT) at three different scales: monofilament, knot, and net. While the PBSAT monofilament's strength was half that of the conventional PA6 net, knot and net losses were even more significant. This indicates a greater sensitivity of the material to the knot. Since the results between the knot and net scales were coherent, testing whole net panels is not necessary. Studying the curvature and the behaviour of the knot revealed its complex geometry and mechanical behaviour. Testing the weaver's knot is a good indicator for studying the relevance of an alternative to conventional fishing gear materials. This should be considered when developing biodegradable nets in order to reduce ghost fishing at sea.
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Affiliation(s)
- Louis Le Gué
- Ifremer, RDT Research and Technological Development, 29280, Plouzané, France.
- Institut Agro, IFREMER, INRAE, DECOD, 56325, Lorient, France.
| | - Esther Savina
- Section for Fisheries Technology, DTU Aqua, 9850, Hirtshals, Denmark
| | - Mael Arhant
- Ifremer, RDT Research and Technological Development, 29280, Plouzané, France
| | - Peter Davies
- Ifremer, RDT Research and Technological Development, 29280, Plouzané, France
| | - Nicolas Dumergue
- Ifremer, RDT Research and Technological Development, 29280, Plouzané, France
| | - Benoit Vincent
- Institut Agro, IFREMER, INRAE, DECOD, 56325, Lorient, France
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Anusha JR, Citarasu T, Uma G, Vimal S, Kamaraj C, Kumar V, Muzammil K, Mani Sankar M. Recent advances in nanotechnology-based modifications of micro/nano PET plastics for green energy applications. CHEMOSPHERE 2024; 352:141417. [PMID: 38340992 DOI: 10.1016/j.chemosphere.2024.141417] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 11/06/2023] [Accepted: 02/07/2024] [Indexed: 02/12/2024]
Abstract
Poly(ethylene terephthalate) (PET) plastic is an omnipresent synthetic polymer in our lives, which causes negative impacts on the ecosystem. It is crucial to take mandatory action to control the usage and sustainable disposal of PET plastics. Recycling plastics using nanotechnology offers potential solutions to the challenges associated with traditional plastic recycling methods. Nano-based degradation techniques improve the degradation process through the influence of catalysts. It also plays a crucial role in enhancing the efficiency and effectiveness of recycling processes and modifying them into value-added products. The modified PET waste plastics can be utilized to manufacture batteries, supercapacitors, sensors, and so on. The waste PET modification methods have massive potential for research, which can play major role in removing post-consumer plastic waste. The present review discusses the effects of micro/nano plastics in terrestrial and marine ecosystems and its impacts on plants and animals. Briefly, the degradation and bio-degradation methods in recent research were explored. The depolymerization methods used for the production of monomers from PET waste plastics were discussed in detail. Carbon nanotubes, fullerene, and graphene nanosheets synthesized from PET waste plastics were delineated. The reuse of nanotechnologically modified PET waste plastics for potential green energy storage products, such as batteries, supercapacitors, and sensors were presented in this review.
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Affiliation(s)
- J R Anusha
- Centre for Marine Science and Technology, Manonmaniam Sundaranar University, Rajakkamangalam, Kanyakumari District, Tamilnadu, 629 502, India
| | - T Citarasu
- Centre for Marine Science and Technology, Manonmaniam Sundaranar University, Rajakkamangalam, Kanyakumari District, Tamilnadu, 629 502, India
| | - G Uma
- Centre for Marine Science and Technology, Manonmaniam Sundaranar University, Rajakkamangalam, Kanyakumari District, Tamilnadu, 629 502, India
| | - S Vimal
- Department of Biochemistry, Saveetha Medical College & Hospital, Saveetha Institute of Medical and Technical Sciences (SIMATS), Thandalam, Chennai, 602105, Tamilnadu, India.
| | - Chinnaperumal Kamaraj
- Interdisciplinary Institute of Indian System of Medicine (IIISM), Directorate of Research, SRM Institute of Science and Technology, Kattankulathur, Tamil Nadu - 603203, India
| | - Vinay Kumar
- Department of Community Medicine, Saveetha Medical College & Hospital, Saveetha Institute of Medical and Technical Sciences (SIMATS), Thandalam, Chennai, 602105, Tamil Nadu, India
| | - Khursheed Muzammil
- Department of Public Health, College of Applied Medical Sciences, Khamis Mushait Campus, King Khalid University, Abha, 62561, Saudi Arabia
| | - M Mani Sankar
- Department of Biochemistry, Saveetha Medical College & Hospital, Saveetha Institute of Medical and Technical Sciences (SIMATS), Thandalam, Chennai, 602105, Tamilnadu, India
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Yu M, Tang Y, Min M, Herrmann B, Cerbule K, Liu C, Dou Y, Zhang L. Comparison of physical properties and fishing performance between biodegradable PLA and conventional PA trammel nets in grey mullet (Mugil cephalus) and red-lip mullet (Liza haematocheila) fishery. MARINE POLLUTION BULLETIN 2023; 195:115545. [PMID: 37722264 DOI: 10.1016/j.marpolbul.2023.115545] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2023] [Revised: 09/09/2023] [Accepted: 09/11/2023] [Indexed: 09/20/2023]
Abstract
Marine plastic pollution and continuous capture of marine animals, so-called "ghost fishing", by abandoned, lost, or otherwise discarded fishing gear (ALDFG) are global concerns. This study investigated whether biodegradable polylactic acid (PLA) monofilaments can be used to replace conventionally used non-biodegradable polyamide (PA) in trammel net fishery for limiting ALDFG associated effects. It evaluated the physical properties of PLA and PA monofilaments and compared fishing performance of PLA and PA trammel nets in a commercial mullet fishery in the Yellow Sea, China. Although PA monofilament exhibited superior physical properties, no significant differences in catch efficiency between PA and PLA trammel nets were observed. Fish of both species were mainly captured by pocketing which can further explain observed similar catch efficiency. These initial results suggest a potential for applying biodegradable materials in trammel net fisheries. Therefore, further long-term testing is encouraged to investigate whether this promising performance is persistent over long-term.
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Affiliation(s)
- Mengjie Yu
- Fisheries College, Ocean University of China, 266003 Qingdao, Shandong, China
| | - Yanli Tang
- Fisheries College, Ocean University of China, 266003 Qingdao, Shandong, China.
| | - Minghua Min
- East China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, 200090 Shanghai, China.
| | - Bent Herrmann
- SINTEF Ocean, Fishing Gear Technology, Trondheim, Norway; UiT The Arctic University of Norway, Tromsø, Norway; DTU Aqua, Technical University of Denmark, Hirtshals, Denmark
| | - Kristine Cerbule
- SINTEF Ocean, Fishing Gear Technology, Trondheim, Norway; UiT The Arctic University of Norway, Tromsø, Norway
| | - Changdong Liu
- Fisheries College, Ocean University of China, 266003 Qingdao, Shandong, China
| | - Yilin Dou
- Fisheries College, Ocean University of China, 266003 Qingdao, Shandong, China
| | - Liyou Zhang
- Fisheries College, Ocean University of China, 266003 Qingdao, Shandong, China
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