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Papers
61,005 resultsShowing papers similar to Effect of Chemical Agents on the Morphology and Chemical Structures of Microplastics
ClearThe effect of the significant acid and alkaline environment and oxidation agent on the microplastic integrity
This study examined how strong acid, alkaline, and oxidizing chemical treatments affect the integrity and identifiability of microplastics. Researchers found that certain pretreatment methods altered the chemical structure and morphology of microplastic particles, which has important implications for improving detection and analysis protocols in environmental samples.
Impact of treatment chemicals on the morphology and molecular structure of microfibers and microplastic films in wastewater
Researchers exposed microfibers and microplastic films to common wastewater treatment chemicals (sodium hypochlorite, hydrogen peroxide, calcium hydroxide) and found that these treatments cause significant morphological and molecular structural changes to plastic particles.
Effects of chemical pretreatments on microplastic extraction in sewage sludge and their physicochemical characteristics
This study evaluated different chemical pretreatment methods for extracting microplastics from sewage sludge, finding that some treatments can alter the physical and chemical properties of plastic particles in ways that affect identification. Choosing the right extraction method is important for accurately characterizing microplastic contamination in biosolids.
Microplastic sample purification methods - Assessing detrimental effects of purification procedures on specific plastic types
Researchers assessed how common microplastic purification methods affect different polymer types, finding that acidic and alkaline digestion can degrade certain plastics like polycarbonate and polyamide, potentially leading to underestimation in environmental samples.
Microplastic extraction protocols can impact the polymer structure
Researchers found that common laboratory extraction protocols used to isolate microplastics from environmental samples can alter the polymer structure of the particles, potentially skewing identification and quantification results.
Role of Structural Morphology of Commodity Polymers in Microplastics and Nanoplastics Formation: Fragmentation, Effects and Associated Toxicity in the Aquatic Environment
This review examines how the structural morphology and chemical composition of commodity polymers influence the formation and environmental behaviour of microplastics and nanoplastics, arguing that chemical degradation pathways have been largely overlooked in favour of purely physical abrasion explanations for plastic fragmentation.
Effects of ChemicalPretreatment on Natural FibersRemoval and Microplastics Integrity for Wastewater Characterization
Researchers evaluated nine chemical digestion protocols for microplastic analysis in wastewater, testing their effects on nine polymer types and three natural fiber controls to identify treatments that remove interfering natural fibers without damaging microplastic particles. The sequential NaClO/H2O2 protocol at controlled temperatures achieved complete natural fiber oxidation while maintaining polymer integrity across all tested microplastic types.
Evaluating the Effect of Chemical Digestion Treatments on Polystyrene Microplastics: Recommended Updates to Chemical Digestion Protocols
Researchers evaluated how common chemical reagents used to extract microplastics from biological samples affect polystyrene particles. They found that nitric acid was the most destructive to the plastics, while alkaline and oxidative reagents caused negligible changes. The study recommends updating standard laboratory protocols to avoid accidentally damaging microplastics during extraction, which could lead to inaccurate pollution measurements.
Various Digestion Protocols Within Microplastic Sample Processing—Evaluating the Resistance of Different Synthetic Polymers and the Efficiency of Biogenic Organic Matter Destruction
Multiple organic matter digestion protocols used in microplastic sample preparation were systematically evaluated for their effectiveness in removing biogenic material while preserving plastic particles. The review helps standardize sample processing by identifying which digestion chemicals and conditions work best for different environmental matrices.
Development of Standardized Methods to Extract and Digest Microplastics in Environmental Samples
Researchers tested 72 combinations of chemical extraction and digestion methods to find approaches that accurately recover microplastics from environmental samples without damaging them. They found that different density separation solutions and digestion reagents can significantly alter the physical and chemical properties of certain plastic types, particularly PET and polystyrene. The study provides practical guidance for selecting methods that preserve microplastic integrity during laboratory analysis.
The Influence of Ocean Acidification on The Surface Alteration of Microplastics
Researchers exposed virgin microplastics to normal seawater (pH 8.0) and acidified seawater (pH 7.7) for 10 days, using field emission scanning electron microscopy to show that ocean acidification accelerates surface aging and physical damage to microplastic particles, suggesting that increasing ocean acidity may enhance chemical leaching from plastics.
Extraction of microplastic from biota: recommended acidic digestion destroys common plastic polymers
This study tested standard acidic tissue digestion protocols used to extract microplastics from marine organisms and found that the recommended nitric acid treatment destroyed certain common plastic types beyond recognition. The findings warn that protocols designed to remove biological tissue can inadvertently degrade the very microplastics researchers are trying to detect.
Common laboratory reagents: Are they a double-edged sword in microplastics research?
This study tested whether common laboratory reagents themselves are contaminated with microplastics and found measurable plastic particles in several widely used chemicals, raising the concern that lab reagents could be an overlooked source of contamination in microplastic research.
Efficacy of chemical digestion methods to reveal undamaged microplastics from planktonic samples
Researchers compared several chemical methods for removing biological material from marine water samples so that microplastics associated with plankton can be accurately identified. They found that alkaline and oxidative digestion methods were the most effective at breaking down plankton while causing minimal damage to the microplastic particles themselves. The study contributes to standardizing laboratory techniques so that microplastic measurements across different research groups are more comparable and reliable.
The Emerging of Microplastic and Nanoplastic as Pollutants and their Characterization and Analysis
This review presents an integrated approach to sampling, sample preparation, and analytical methods for detecting microplastics and nanoplastics in solid and aqueous environmental samples, discussing current challenges and emerging methodologies for more accurate characterization.
Comparative study of matrix etching methods for the separation of microplastics from environmental samples
Researchers compared commonly used chemical methods for separating microplastics from environmental samples, testing different configurations of time, temperature, and agitation. They found that oxidative digestion with a high concentration of oxidant was the most effective approach for both bulk and compact sample types. The study provides practical guidance for selecting the most efficient and safe matrix etching method for microplastic extraction in environmental research.
Preparation of Degraded Microplastics That Imitate Surface Properties in the Environment
Researchers developed laboratory methods to prepare degraded microplastics that accurately mimic the surface properties of environmentally weathered particles, filling a gap in toxicology research that often uses pristine plastic beads instead of realistic aged particles. The study characterized how surface chemistry, roughness, and charge of laboratory-degraded microplastics compare to those collected from natural environments.
Why it is important to analyze the chemical composition of microplastics in environmental samples
This review argued for the critical importance of chemical composition analysis in microplastic research, noting that visual identification methods have historically overestimated microplastic quantities and that more sophisticated analytical approaches are needed for accurate characterization of particles smaller than 500 micrometers.
Surface Chemistry in Environmental Degradation of Polymeric Solids
Researchers reviewed the three main degradation pathways of plastic materials from a surface chemistry perspective: chemical, biological, and mechanical degradation. They described how these processes can occur consecutively or simultaneously in the environment, ultimately producing microplastics. The study provides a scientific framework for understanding how plastics break down into smaller particles, which is essential for developing strategies to address microplastic pollution.
The pretreatment method in marine organisms and sediment for microplastics analysis by FTIR using “Cylindrical microplastics fractionator”
Researchers compared different chemical pretreatment methods for removing organic matter from marine organisms and sediments before microplastic analysis by infrared spectroscopy, identifying approaches that are effective without destroying the plastic particles. Standardizing sample preparation is critical for producing reliable, comparable microplastic data across studies and laboratories.
Pre-oxidization-induced change of physicochemical characteristics and removal behaviours in conventional drinking water treatment processes for polyethylene microplastics
Researchers investigated how pre-oxidation treatments alter the physicochemical properties of polyethylene microplastics and found that oxidation changed surface characteristics and influenced removal efficiency during conventional drinking water treatment processes.
Aging behavior of microplastics accelerated by mechanical fragmentation: alteration of intrinsic and extrinsic properties
Researchers mechanically fragmented polystyrene, polypropylene, and PET microplastics to simulate environmental aging, finding that fragmentation alters surface chemistry, crystallinity, and heavy metal adsorption capacity, with aging degree measurable through structural changes.
In vitro digestion of microplastics in human digestive system: Insights into particle morphological changes and chemical leaching
Researchers simulated human digestion on four common types of microplastics and found that stomach acid and digestive enzymes changed the particles' shape, surface texture, and caused them to release chemical additives. The study shows that microplastics are not inert once swallowed -- they are actively transformed in the gut, which could increase their ability to interact with intestinal tissues and release potentially harmful chemicals.