Marine Plastic Research Articles

Harvesting marine plastic pollutants-derived renewable energy: A comprehensive review on applied energy and sustainable approach

The inevitable use of plastics in the existing standard of life makes its way to ecosystems, predominantly into the marine ecosystem. Recent research on energy recycling from marine discarded plastics through biological, chemical, and thermal processes is summarized, which degrade plastic debris and transform it into energy-efficient products. In a system-oriented approach, different boundaries like carbon efficiency, global warming potential, cumulative energy demand, and cost of the product have been evaluated. Even these technologies may successfully reduce the yearly volume of marine plastics by up to 89% while reducing greenhouse gas emissions by 30%. Conversely, recycling a ton of marine discarded plastics may save 915 cubic feet of landfill space, 6500 kWh of energy, and barrels of oil. Energy may be recovered up to 79% from waste plastics using various techniques. Up to 84% liquid fuel had been generated, with a maximum calorific power of 45 MJ/kg. It has been shown that in Asian countries, the power generation capacity of throw-away facemask wastes regularly varies from 2256 kWh/day to 18.52 million kWh/day. Hence, the conversion of marine plastics into biofuel, syngas, biochar, hydrocarbons, electricity, and value-added functional materials by various biotechnological and chemical processes like biodegradation, pyrolysis, gasification, methanolysis, and hydrolysis should be improvised as a source of alternative energy in the immediate future. Our review signifies the potential benefits of energy harvesting technologies from marine plastics pollutants to overcome the growing challenge of energy demands and provide a long-term solution to underdeveloped and developing countries as a sustainable source of energy. Endorsing current strategies to harvest energy from marine plastic wastes that enhance power generation technologies will help in building a more sustainable and greener environment that imparts a healthy and circular economy while shielding natural resources.

Assessing the efficiency of microplastics extraction methods for tropical beach sediments and matrix preparation for experimental controls

IntroductionMicroplastic pollution has become a global issue, eliciting attention not just from the scientific community but also both from the public and governmental bodies. Drawing data-driven policies and interventions, however, remain difficult due to the severely lacking baseline information from different environments such as beaches. One of the challenges in doing baseline studies is the lack of harmonized methodologies that will allow for comparison of results, integration of data, and its effective translation to evidence-based policies. Emphasis on quality control measures among baselining efforts through the proper implementation of experimental controls is also lacking.MethodologyTo address these gaps, we compared methodologies for preparing the sediment matrix for experimental controls, as well as evaluated protocols for extracting microplastics from tropical beach sediments. Beach sediments were collected, dried, sieved, and spiked with known amounts of microplastics of different polymer types. The removal and extraction efficiencies of the protocols being compared were evaluated.Results and discussionOur results showed that subjecting beach sediments to a furnace at 550° C for 4 hours is the most efficient way to remove plastic contamination, implying its applicability for preparing experimental controls. Meanwhile, a modified version of Masura et al. (2015), one of the widely cited methodologies for microplastics extraction, exhibited the highest mean extraction efficiency (99.05 ± 0.82%) among the protocols being compared. Results of this work will be useful in identifying methods that can be adopted and utilized for research and baselining efforts not just in the Philippines but also in Southeast Asia. This will also be helpful in the harmonization of methods, data reporting, and even skills as implemented through the regional and national action plans to address marine plastic pollution.

Marine plastic detection using PRISMA hyperspectral satellite imagery in a controlled environment

ABSTRACT The amount of plastics on seawater is causing ecosystem damage to both land areas and water bodies. It is proven that once plastic particles reach the sea, they will be degraded. As their detection is not easy with in situ sampling, remote sensing techniques could help detect and evaluate their impact on ecosystems. To understand the main limitations of detecting floating plastic material through remote images, an a pilot experiment was carried out on an artificial floating plastic target deployed at the Aegean Sea (Greece) within the Plastic Litter Project 2021. Hyperspectral PRISMA, multispectral PlanetScope and visible Unmanned Aerial Systems (UAS) acquisitions were analysed. A nonlinear unmixing technique was applied to derive the spectral signature of the plastic target; finally, the linear unmixing approach allowed for determining the plastic percentage occupation at the pixel level. Different band combinations of the PRISMA data were selected to evaluate which provided the best result for the detection; one of these band combinations was retrieved via the principal component analysis. Only slight differences were achieved using the different PRISMA band-sets. As expected, since the artificial plastic target had a diameter comparable with the PRISMA spatial resolution (~30 m), its detection was a challenging task caused by the water influence in the pixel (mixed pixels). The detection was realized by benefitting from the high amount of available spectral bands, as confirmed by the comparative test with a PlanetScope image used at its original spatial resolution (3 m) and after degrading it at the PRISMA level. Results demonstrated that an optimal target detection was possible with few spectral bands, only taking advantage of the high spatial resolution (compared with the target dimension). Indeed, unreliable plastic fractions were derived at the PRISMA spatial resolution with a limited number of spectral bands.

Microbial degradation of marine plastic debris: A comprehensive review on the environmental effects, disposal, and biodegradation

The uncontrolled utilization of plastics and their disposal method presents a global threat owing to their abundance in the marine ecosystem. An exponential upsurge in the practice of synthetic polymers has been reported in the past decade. The degradation of these synthetic polymers is achieved by employing several physiochemical methods. The limited competence of these methods results in the release of hazardous compounds or by-products in the environment. The microbial species isolated from different sources aid in plastic degradation by utilizing them as a sole carbon and energy source. The involvement of microbes in plastic degradation has a profound scope as a cost-effective and eco-friendly alternative to the preexisting techniques. The current review focuses on the environmental effects of plastics and their mitigation through microbial intervention. This review complies with the microplastics and their disposal methods in the environment. The role of microbes and bacterial consortiums in the degradation of plastics and marine plastic debris is also emphasized. The factors affecting microbial degradation and future perspectives were also deliberated in an aspect of environmental welfare.

Rapid marine degradable poly(butylene oxalate) by introducing promotion building blocks

The design and development of high-performance marine-degradable plastics have long been considered a superior strategy to address marine plastic pollution. To achieve a balance between rapid marine degradability and high performance of polyester plastics, this work designed two series of poly(butylene oxalate) (PBOx) copolymers with intrinsic hydrolysis ability using poly(ethylene oxalate) (PEOx) and poly(glycolic acid) (PGA) as promotion building blocks. The synthesis process, crystallization properties, barrier performance, and mechanical properties of copolymers were comparatively investigated. Additionally, the marine degradability of copolymers received specific focus. The theoretical calculation demonstrated that the introduction of promotion blocks reduced the hydrolysis energy barrier of the copolymers. In general, the results revealed the advantages of PBEOx copolymer in satisfying practicality and better regulating marine degradability. The high gas barrier performance, suitable thermal properties, tunable mechanical properties, and rapid marine degradability endow the copolymer as a promising candidate toward sustainable and marine-degradable plastics.

Regional management options for floating marine litter in coastal waters from a life cycle assessment perspective

PurposeDespite the increasing number of publications focusing on the management of marine plastic debris, most research is carried out using an upstream perspective, focused on sources and pathways of marine litter accumulation, as well as actions to prevent plastics from entering the environment. The aim of this paper is therefore to investigate a combination of waste management technologies for marine litter in order to inform decision-making on environmental impact hotspots at regional level.MethodA study of the North Sea German Bight identified existing technologies suitable for the collection and treatment of floating marine debris including, recycling of plastics, mechanical biological treatment (MBT), and landfilling. Processing data for reported marine litter compositions in the region are used to inform the modelling of a waste management strategic plan (WMSP) aimed at valorising various fractions. Hence, collected floating marine litter is separated into derelict fishing gear (DFG) and mixed marine litter (MML) which are sent respectively to a recycling plant for plastic granulates production and to an MBT plant for recovery of metals and electricity generation. Environmental impacts of the WMSP are evaluated using the Life Cycle Assessment methodology and compared with incineration considered as the prevalent waste scenario.Results and discussionAs partly expected, the LCA results reveal higher environmental performance in all impact categories for the incineration scenario. In particular, the WMSP contributes to Global Warming Potential (GWP) more than 10 orders of magnitude less than the incineration scenario. However, the breakdown of results related to the WMSP indicates the highest contribution to environmental impacts attributed to electricity and heat generation from refused-derived fuel and emissions at the combined heat and power plant, as well as electricity and diesel consumption. Lowest contributions are attributed to the recycling plant. The sensitivity analysis revealed low contributions to GWP if plastic debris such as DFG is diverted to recycling while toxicity-related categories are improved by efficient metal and energy recovery at the MBT plant.ConclusionFindings of this study show that no single treatment method is enough rather a combination of different treatment pathways should be designed considering the composition and properties of accumulated marine litter in a specific area. However, recovering plastic litter and diverting useful materials from waste-to-energy to recycling improve the environmental performance. Reviews suggest inclusion of valorisation treatment options in future WMSPs of marine litter such as plastic-to-fuel technologies.

Distribution of microplastics in bathyal- to hadal-depth sediments and transport process along the deep-sea canyon and the Kuroshio Extension in the Northwest Pacific

Understanding microplastic (MP) behavior in oceans is crucial for reducing marine plastic pollution. However, the complex process underlying MP transportation to the deep seafloor remains unknown despite the deep sea being considered its major sink. We focused on MP distribution in Sagami Bay (adjacent to highly populated areas of Japan), the plate triple junction connected through the Sagami Trough, and the abyssal plain immediately below the Kuroshio Extension. We observed the highest number of MPs in the abyssal stations, more than previously reported. The polymer types and aspect ratio of MPs in the abyssal stations significantly differed from those in the bathyal/hadal stations. The study suggests that MPs accumulated in the open ocean surface layer sink to the abyssal plains immediately below it, while MPs from land sources accumulate in the bathyal depth and are transported to the hadal depth near the coast through turbidity currents along the submarine canyon.

Factors driving plastic-related behaviours: Towards reducing marine plastic waste in Hoi An, Vietnam

Single-use plastic (SUP) waste is one of the world's major problems, particularly if it continues to escape into the ocean unchecked; it will become the leading contributor to ocean pollution. Preventing plastic waste at its source has proven to be the most effective solution to the problem. This study explores a variety of factors that may contribute to SUP consumption and reduction behaviour in a convenient sample of residents living in Hoi An, a tourist coastal city in Vietnam. Using a cross-sectional design, the study reached 150 Vietnamese respondents between June and September 2022. The results revealed that subjective knowledge about plastics and plastic wastes (b = 0.391) and perceived strictness of legal consequences of inappropriate plastic disposal (b = -0.642) were two significant predictors of SUP reduction, while perceived cost advantage of plastics (b = 0.390) was the only predictor of SUP consumption. This study also found that the mean reported level of plastic consumption varied across three different parts of Hoi An City, with the residents of Cham Island (an area with active environmental action programmes) consuming significantly fewer SUP products compared to those living in urban and suburban areas. A model of motivation to reduce plastic waste was finally discussed. In conclusion, besides the traditional approach of raising public knowledge on the plastic problem, it is suggested that imposing strict penalties for inappropriate disposal and increasing the price of SUP plastics may be the most effective ways to reduce SUP plastic waste at its sources.

Extreme weather events as an important factor for the evolution of plastisphere but not for the degradation process

Marine plastics, with their negative effects on marine life and the human health, have been recently recognized as a new niche for the colonization and development of marine biofilms. Members of the colonizing communities could possess the potential for plastic biodegradation. Thus, there is an urgent need to characterize these complex and geographically variable communities and elucidate the functionalities. In this work, we characterize the fungal and bacterial colonizers of 5 types of plastic films (High Density Polyethylene, Low Density Polyethylene, Polypropylene, Polystyrene and Polyethylene Terepthalate) over the course of a 242-day incubation in the south-eastern Mediterranean and relate them to the chemical changes observed on the surface of the samples via ATR-FTIR. The 16s rRNA and ITS2 ribosomal regions of the plastisphere communities were sequenced on four time points (35, 152, 202 and 242 days). The selection of the time points was dictated by the occurrence of a severe storm which removed biological fouling from the surface of the samples and initiated a second colonization period. The bacterial communities, dominated by Proteobacteria and Bacteroidetes, were the most variable and diverse. Fungal communities, characterized mainly by the presence of Ascomycota, were not significantly affected by the storm. Neither bacterial nor fungal community structure were related to the polymer type acting as substrate, while the surface of the plastic samples underwent weathering of oscillating degrees with time. This work examines the long-term development of Mediterranean epiplastic biofilms and is the first to examine how primary colonization influences the microbial community re-attachment and succession as a response to extreme weather events. Finally, it is one of the few studies to examine fungal communities, despite them containing putative plastic degraders.

BIODEGRADATION OF WASTED BIOPLASTICS

Bioplastic is plastic made from renewable biological material, usually plants, bio-waste or microorganisms, rather than petroleum or natural gas. Most bioplastics are environmentally friendly compared to plastics that are made from fossil fuels. But this is not always the case - a lot depends on how bioplastic is produced and disposed of. The bioplastics industry is young—accounting for only 1% of global plastics production in 2019. Standardization of raw material sources, types of plastic, or labeling of what is biodegradable or compostable is poorly developed. This often confuses consumers because not everything made from plants is biodegradable. However, growing awareness of the dangers of overuse of plastics and increased government regulation of plastic waste have led to a surge of interest and investment in bioplastics, an industry expected to grow 10-14% in the next few years. It is possible that this will partially help solve one of the most serious environmental problems in the world: plastic pollution. Marine plastic pollution is a growing global problem. The most striking example is the Great Pacific Garbage Patch. According to the EPA (U.S. Environmental Protection Agency), of the approximately 36 million tons of plastic produced annually in the United States, less than 1% is recycled. Globally, only about 9% of plastic waste is recycled. About 11 million tons of plastic waste are dumped into the world's oceans every year. Even more comes from land-based sources, where plastic slowly breaks down into smaller and smaller particles. According to some estimates, there are up to 51 trillion microplastic particles floating in our oceans. Scientists estimate that the average adult ingests approximately 883 microplastic particles every day, which accumulate in our body tissues. Ingestion of plastic by marine and terrestrial animals can have extremely adverse effects on their health, including death.

Comparison of macroplastics dynamic across a tidal-dominated coastal habitat seascape including seagrasses, salt marshes, rocky bottoms and soft sediments

Coastal environments are usually composed by heterogeneous coastal-seascape, which can modify macroplastics accumulation dynamic. We evaluated seasonally the litter trapped on tidal-dominated habitats including two seagrass species, salt marsh, sandy beach, bare sediment and rocky bottom. Vegetated habitats showed the highest plastic accumulation in autumn-winter seasons, especially in medium-lower tidal-elevation zones. Seagrasses accumulated most of the degraded macroplastics, whereas averaged smaller sizes of litter were found in the salt marsh. The trapping ability of macrophytes was related to aboveground-biomass properties (i.e., height, width or flexibility) rather than shoot-density. Sandy beaches exhibited the highest plastics accumulation matching with the touristic-peak in the area, whereas rocky bottom was an important sink for macroplastics. This study provides authorities with comprehensible information to address the marine plastic litter problem taking into account the habitat-connectivity, the litter trap-ability of macrophytes and the tidal-elevation influence in order to improve future actions to deal with plastic pollution.

The contributions of citizen science to SDG monitoring and reporting on marine plastics

The accumulation of plastic litter in marine environments is a major environmental challenge along with the difficulties in their measurement because of the massive size of the oceans and vast circulation of plastic litter, which is being addressed as part of the United Nations (UN) Sustainable Development Goals (SDGs). Citizen science, public participation in scientific research and knowledge production, represents a potential source of data for SDG monitoring and reporting of marine plastic litter, yet there has been no evidence of its use to date. Here, we show how Ghana has become the first country to integrate existing citizen science data on marine plastic litter in their official monitoring and reporting of SDG indicator 14.1.1b for the years 2016–2020, which has also helped to bridge local data collection efforts with global monitoring processes and policy agendas by leveraging the SDG framework. The results have been used in Ghana’s 2022 Voluntary National Review of the SDGs, and reported on the UN SDG Global Database, as well as helping to inform relevant policies in Ghana. In addition, here, we present a pathway that can be adopted by the relevant government authorities in other countries that have an interest in following a similar citizen science data validation and reporting process for this indicator and potentially others.

Determination of complex refractive index of plastics from ultraviolet to mid-infrared by ellipsometry

Plastic litter is a pervasive issue in the ocean, posing threats to both marine ecosystems and human health. In the field of marine remote sensing detection, one common method for detecting and identifying marine plastics is by analyzing their optical characteristics, specifically their spectral remote sensing reflectance. This reflectance is dependent on the complex refractive index of plastics. Therefore, understanding the complex refractive index, which is an intrinsic optical property of plastics, holds significant importance in marine plastics research. In this study, we utilized spectroscopic ellipsometry to measure the complex refractive index of 9 common ploymers including polymethyl methacrylate (PMMA), methyl methacrylate–styrene copolymer (MS), polyethylene (PE), poly (ethylene glycol-co-cyclohexane-1,4-dimethanol terephthalate) (PETG), polybutylene terephthalate (PBT), polyoxymethylene (POM), perfluoroalkoxy (PFA), acrylonitrile butadiene styrene (ABS), and styrene-acrylonitrile copolymer (SAN). In addition, we have expanded the complex range of refractive index measurements to include UV and MIR bands with wavelengths up to 32 μm. To ensure the reliability and accuracy of the measurements, experimental results for polycarbonate (PC) were compared with data from the existing literature. The variation of refractive index with wavelength is studied and the causes of absorption peaks in the infrared range are discussed. Furthermore, Considering the dispersion relationship and monomer composition of PMMA, MS, ABS and SAN plastics, a comparative analysis of plastics with commonly used monomers is conducted, and the influence of monomers on refractive index is discussed. Our study indicates that the presence of styrene monomers leads to an increase in the refractive index of plastics in the visible to near-infrared band, while the presence of butadiene monomers results in a decrease.The findings from this study provide fundamental data for future research on marine plastic remote sensing detection applications.

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 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.

Effective reduction of land-to-ocean plastic leakage in Thailand from 2000 to 2019 and implications for low- and middle-income countries

Low- and middle-income countries (LMICs) normally lack reliable estimates regarding their long-term, land-to-ocean plastic leakage, hindering global endeavour in addressing marine plastic pollution. Here, we proposed a plastic flow framework for LMICs and applied it to estimate Thailand's plastic flows from production to marine deposition during 2000–2019. The results show that land-to-ocean plastic leakage decreased from 0.60 million tonnes (MT) in 2000 to 0.37 MT in 2019 (29% to 7% of generated), due to improved waste management. The leaked plastics amounted to 9.91 MT over two decades, with 47% being packaging materials and 76% polyethene. However, even substituting all packaging plastics with biodegradable ones, at least 39% of the two-decade leaked plastics remained in aquatic sediments by 2019. Our result indicated that improving waste management and biodegradable plastics substitution both are effective but have limits in mitigating marine plastic pollution. We thus suggest further harnessing the power of informal sectors and improving environmental infrastructure.

Perception and Awareness of Marine Plastic Pollution in Selected Tourism Beaches of Barobo, Surigao del Sur, Philippines

Tourism is a significant economic activity in coastal communities, but when badly managed, it degrades the health of the marine-coastal ecosystem, increasing litter pollution and repels beach visitors. This study aims to assess the tourism impact on litter pollution on four growing tourism beaches of Barobo, Surigao del Sur, Philippines. Plastic litters were sampled from four tourism sites (Cabgan Island, Turtle Island, Dapdap Beach, Panaraga Beach) of Barobo by establishing transect lines with quadrats. Those who agreed to participate in perception and knowledge tests about marine debris were interviewed at the aforementioned beaches. Respondents was generally aware of marine pollution problems, specifically marine pollution relating to human and ecological health. Respondents identified tourism as a main litter source and plastic packaging as the most common litter type, which is true based on macrolitter collection. Because tourism causes plastic pollution on all of the beaches studied, stronger regulations, educational, and awareness efforts are crucial to reduce litter pollution and avert ecological and socioeconomic consequences.
 Structured Abstract: Purpose: Tourism plays a big role in the economic status of a country. It provides livelihood to the community and helps in poverty elevation. But tourism also brings pollution, i.e., plastic pollution, if not properly managed. The primary objective of this study is to evaluate the perception and awareness of tourists on plastic pollution and its impacts on tourism. 
 Design/methodology/approach: The study was limited to surveys and key informant interviews (KII) since fora and assemblies are not allowed due to pandemic health protocols. Survey sampling was done simultaneously with the macroplastic collection from July 10 to August 12, 2021. Convenience sampling design was used, and data was collected on willing individuals present in the area. The awareness questionnaire used the Likert Scale method, while the individual perception used multiple choice or open-ended questions. Statistical data analysis was performed using SPSS and Microsoft excel.
 Findings: A total of 105 willing individuals were legally part of this study. Of the 105 respondents surveyed, 70 of which are tourists from island beaches and 35 are from mainland beaches. Respondents were generally aware of most issues presented to them. The top issues that the respondents relate the most are related to plastic effects on health and environment. The majority of the surveyed tourists on island beaches perceived high macrolitter pollution, while those on mainland beaches perceived low pollution. This perception of respondents agrees with the litter quantities registered and collected. Furthermore, the perception of plastic packaging as the most common type of litter has been found out to be true based on sampling collections. Tourists on the beaches of Barobo are aware of the problem of marine litter and see the tourism sector as a source of waste, notably plastics.
 Originality: This research paper submitted by us is an outcome of our independent and original work. We have duly acknowledged all the sources from which the ideas and extracts have been taken. The paper is free from any plagiarism and has not been submitted elsewhere for publication.

Impacts of nutrient and marine plastic debris influx on the microalgal community (phytoplankton and periphyton) in Korean temperate coastal waters: Mesocosm study

Impacts of nutrient and marine plastic debris influx on the microalgal community (phytoplankton and periphyton) in Korean temperate coastal waters: Mesocosm study

Second meeting of the intergovernmental negotiational committee for the development of a legally binding international treaty to combat environmental pollution, including marine plastic garbage

Second meeting of the intergovernmental negotiational committee for the development of a legally binding international treaty to combat environmental pollution, including marine plastic garbage

Impact of mangrove forest structure and landscape on macroplastics capture

Complex networks of above-ground roots and trunks make mangrove forests trap plastic litter. We tested how macroplastics relate to tree biomass, root abundance, mangrove geomorphology and river mouth proximity, surveying landward and seaward margins of seven forests in the Philippines, a global hotspot for marine plastic pollution. Macroplastics were abundant (mean ± s.e.: 1.1 ± 0.22 items m−2; range: 0.05 ± 0.05 to 3.79 ± 1.91), greatest at the landward zone (mean ± s.e.: 1.60 ± 0.41 m−2) and dominated by land-derived items (sachets, bags). Plastic abundance and weight increased with proximity to river mouths, with root abundance predicting plastic litter surface area (i.e., the cumulative sum of all the surface areas of each plastic element per plot). The study confirms rivers are a major pathway for marine plastic pollution, with mangrove roots are the biological attribute that regulate litter retention. The results suggest land-based waste management that prevent plastics entering rivers will reduce marine plastic pollution in Southeast Asia.

Comparative study of the aging degradation behaviors of PET under artificially accelerated and typical marine environment

The aging degradation behaviors of the most common PET plastics in the marine environment were investigated in different conditions, with the combination of "real-world sample/outdoor simulation/aging box accelerated simulation". By obtaining data on the morphology, biological and microbial distribution, mechanical properties, viscosity, color difference, thermal properties, and chemical composition of marine plastics after aging, the influence of typical environmental factors such as light, temperature, high pressure, salinity, moisture, and marine life on the aging degradation behavior of PET plastics were discussed. Among them, light, high pressure heat and humid environment have the most significant effects on degradation, while the high-salt environment has less effect on degradation. In addition, the Pressure Cooker Test (PCT) results showed that the ordinary cleaning process is not enough to remove the inorganic substances that penetrated into the interior of marine plastics, which will have a negative impact on the performance of marine plastics. Therefore, it is necessary to select appropriate recycling methods and processes. This study provides a new idea for the study of the aging degradation behavior of marine plastics, which is important for analyzing the environmental factors affecting the degradation behavior of marine plastics in the marine environment.