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61,005 resultsShowing papers similar to Laboratory Test Methods to Determine the Degradation of Plastics in Marine Environmental Conditions
ClearBiodegradation of plastics in the pelagic environment of the coastal zone – Proposed test method under controlled laboratory conditions
This paper proposed a standardized test method for evaluating the biodegradation of bio-based plastics in the pelagic coastal zone environment, addressing the lack of suitable protocols for assessing marine biodegradability as an alternative to conventional non-degradable plastics.
Field and mesocosm methods to test biodegradable plastic film under marine conditions
Researchers developed and tested field and mesocosm methods for assessing biodegradation of biodegradable plastic films under real marine conditions, addressing the lack of validated test standards for certifying marine biodegradation. The study presents newly developed protocols bridging laboratory respirometric data and field performance, providing tools for evaluating whether biodegradable plastics reliably break down in marine environments.
Laboratory experiments related to marine plastic pollution: a review of past work and future directions
This review catalogued laboratory experiments on marine plastic pollution, summarizing findings on plastic degradation, ingestion by marine organisms, and chemical leaching under simulated ocean conditions. The authors identified key knowledge gaps and called for more standardized experimental protocols.
Biodegradability standards for carrier bags and plastic films in aquatic environments: a critical review
Researchers critically reviewed existing biodegradability standards for carrier bags and plastic films in aquatic environments and found that current testing protocols do not adequately reflect real-world marine or freshwater conditions. The study suggests that labeling plastics as "biodegradable" may be misleading, since degradation rates vary dramatically depending on temperature, oxygen levels, and microbial communities present in natural water bodies.
From model to nature — A review on the transferability of marine (micro-) plastic fragmentation studies
A review of marine microplastic fragmentation studies found significant methodological inconsistencies that limit transferability of laboratory results to natural marine conditions, and proposes standardization criteria for fragmentation experiments to enable more reliable predictions of plastic degradation at sea.
A critical review on the evaluation of toxicity and ecological risk assessment of plastics in the marine environment
This critical review questions whether current scientific methods can adequately assess the ecological risks of plastic pollution in the ocean. The authors note that plastics can cause physical, chemical, and biological harm to marine life, but most studies use unrealistically high concentrations and pristine lab-made particles rather than real-world weathered plastics. The review calls for more standardized and environmentally relevant testing approaches.
An In Situ Experiment to Evaluate the Aging and Degradation Phenomena Induced by Marine Environment Conditions on Commercial Plastic Granules
Researchers designed two experimental setups to monitor the aging and degradation of commercial plastic granules (HDPE, PP, PLA, and PBAT) in marine conditions over three years. The first six months of results showed measurable changes in plastic properties from exposure to seawater and beach conditions. The study provides real-world data on how different plastic types degrade in marine environments, with biodegradable plastics showing faster changes than conventional polymers.
Plastic degradation in aquatic environments: a review of challenges and the need for standardized experimental approaches
This review analyzed over 100 studies on how plastics degrade in aquatic environments and found that experimental approaches vary widely, making it difficult to compare results across research groups. Researchers identified key inconsistencies in how degradation conditions, measurement techniques, and reporting standards are applied. The study calls for standardized experimental protocols so the scientific community can more reliably predict how plastic waste breaks down into microplastics in real-world water systems.
Marine microplastic: Preparation of relevant test materials for laboratory assessment of ecosystem impacts
Researchers developed methods to prepare environmentally realistic marine microplastic test materials from weathered plastic litter for laboratory ecotoxicology studies, addressing the limitation that most prior research used pristine, homogeneous plastics that do not reflect real-world microplastic complexity.
Are biodegradable plastics an environmental rip off?
Researchers critically analyzed current technical standards used to certify plastic biodegradability and found that test conditions fail to reflect real-world aquatic and deep-sea environments where most plastic ends up, arguing that existing certifications may be misleading and that standards must be urgently revised to include deep-sea conditions, microplastic formation, and ecotoxicological endpoints.
Biodegradable plastics in the marine environment: a potential source of risk?
This review examines whether biodegradable plastics offer a genuine solution to marine plastic pollution, finding that their environmental behavior depends heavily on specific conditions and that they may still pose risks in marine environments where decomposition is slow.
Constraints and Priorities for Conducting Experimental Exposures of Marine Organisms to Microplastics
Researchers reviewed the design of laboratory microplastic exposure experiments on marine organisms and identified key constraints including unrealistic concentrations, lack of weathered particles, and limited consideration of mixture effects. The study provides guidance on experimental priorities, emphasizing the need for environmentally relevant conditions and standardized methods to produce more reliable and comparable ecotoxicological data.
Review on the Biological Degradation of Polymers in Various Environments
This review provides an overview of how biodegradable plastics degrade under different environmental conditions including soil, freshwater, marine, and composting environments. It finds that biodegradability is a material property strongly dependent on environmental conditions, and that many so-called biodegradable plastics degrade far more slowly in nature than in controlled test conditions.
Bioplastics in the Sea: Rapid In-Vitro Evaluation of Degradability and Persistence at Natural Temperatures
Researchers evaluated the marine degradability of multiple bioplastic materials at natural seawater temperatures, finding that most bioplastics persist in ocean environments rather than degrading quickly, challenging assumptions that bioplastics represent a straightforward solution to marine plastic pollution.
UV-degradation is a key driver of the fate and impacts of marine plastics. How can laboratory experiments be designed to effectively inform risk assessment?
Researchers reviewed laboratory studies on how UV light breaks down marine plastics, finding that sunlight-driven degradation is the primary force fragmenting plastics into micro- and nanoplastics and releasing toxic chemicals into seawater, while calling for better-standardized experiments to make lab findings more applicable to real ocean conditions.
Plastics Degradation Process within a Controlled Aqueous Laboratory Setting
This study developed a controlled laboratory method to investigate plastic degradation in aquatic environments over time, analyzing the physical and chemical changes in plastic particles as they weather and fragment. Understanding plastic degradation kinetics is important for predicting how quickly macroplastics generate microplastics in water bodies.
Degradation efficiency of biodegradable plastics in subtropical open-air and marine environments: Implications for plastic pollution
Researchers tested several types of biodegradable plastics in real outdoor and ocean environments in Hong Kong and found that most failed to break down significantly over the study period. This means biodegradable plastics marketed as eco-friendly alternatives can still fragment into microplastics that persist in the environment and potentially enter the food chain, posing similar risks to conventional plastics.
Bridging the gap: Environmentally relevant aging of microplastics under laboratory conditions
Researchers reviewed approaches to simulate environmental aging of microplastics under controlled laboratory conditions, evaluating how well lab protocols replicate real-world weathering. The review identified gaps between laboratory aging methods and actual outdoor weathering outcomes, recommending more environmentally realistic test conditions.
Monitoring polymer degradation under different conditions in the marine environment
Researchers simulated four marine environmental conditions over one year and found that biobased plastics like polylactic acid degrade up to five times faster in seafloor sediment than in the water column, while conventional plastics showed little degradation difference across conditions.
Evaluation of the degradation from micro to nanoplastics from biodegradable bags in marine conditions
Researchers evaluated how biodegradable plastic bags degrade into micro- and nanoplastics under environmental conditions, comparing them to conventional plastics. The study found that even biodegradable materials generate persistent micro- and nanoplastic particles under real-world conditions.
Biodegradation of Polymers: Stages, Measurement, Standards and Prospects
This review covers all stages of polymer biodegradation, from initial surface colonization by microbes to complete breakdown into CO2 and water. The authors compare testing standards across different environments like soil, marine, and compost settings, noting significant gaps between lab results and real-world degradation rates. Understanding true biodegradability is critical because many products marketed as biodegradable may still leave behind persistent microplastic fragments.
Methods for sampling, processing, identification,and quantification of microplastics in the marine environment
This paper reviews and compares the various methods used to collect, process, identify, and quantify microplastics across different environmental samples. It highlights the lack of standardized protocols as a major obstacle to comparing results across studies and calls for methodological harmonization.
Bridging Three Gaps in Biodegradable Plastics: Misconceptions and Truths About Biodegradation
This review addresses common misconceptions about biodegradable plastics, clarifying that degradation depends heavily on specific environmental conditions and that most biodegradable plastics do not fully break down in typical marine or soil environments.
Microplastics Generation: Onset of Fragmentation of Polyethylene Films in Marine Environment Mesocosms
Researchers investigated how high-density polyethylene films from plastic bags fragment into microplastics under simulated beach and nearshore conditions over six months. The study found that natural sunlight exposure on sand or in seawater caused measurable degradation, providing evidence for how everyday plastic bags break down into microplastic particles in marine environments.