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61,005 resultsShowing papers similar to A fluorescence indicator for source discrimination between microplastic-derived dissolved organic matter and aquatic natural organic matter
ClearSpectroscopic Tracking of the Characteristics of Microplastic-Derived Dissolved Organic Matter
This study used fluorescence spectroscopy to track dissolved organic matter leaching from polyethylene, PVC, and other plastic types over time, finding that different polymers release distinct dissolved organic matter compositions with varying potential to affect aquatic ecosystems.
Fluorescence Signatures of Dissolved Organic Matter Leached from Microplastics: Polymers and Additives
Researchers used fluorescence analysis to characterize the dissolved organic matter that leaches from common microplastics like PVC and polystyrene, as well as from additives like phthalates and bisphenol A. They found that UV light exposure accelerated the leaching process and identified distinct fluorescence signatures linked to specific plastic types and additives. The study highlights an overlooked pathway by which microplastics release chemical compounds into aquatic environments.
The deciphering of microplastics‐derived fluorescent dissolved organic matter in urban lakes, canals, and rivers using parallel factor analysis modeling and mimic experiment
Fluorescent dissolved organic matter leached from microplastics in urban lakes, canals, and rivers was characterized using 3D excitation-emission matrix spectroscopy, identifying five distinct fluorophores linked to plastic degradation products.
Phototransformation and photoreactivity of MPs-DOM in aqueous environment: Key role of MPs structure decoded by optical and molecular signatures
Researchers investigated how dissolved organic matter released from microplastics behaves during light-driven transformation in water. They found that organic matter from benzene-containing polymers showed distinctly different photoreactivity compared to matter from polyolefin-based plastics. The study reveals that the chemical structure of the parent microplastic plays a key role in determining how its dissolved byproducts react and generate reactive species in aquatic environments.
Dissolved organic matter proxies for tracing microplastics and phthalates in urbanized rivers: Fluorescence and molecular insights
Researchers proposed dissolved organic matter fluorescence proxies as effective tracers for microplastic and phthalate contamination in urbanized rivers, validating the approach in China's Haihe River and multiple global urban waterways by linking protein-like DOM increases from wastewater discharge to co-occurring plastic pollutants.
Changes in Fluorescence of Aquatic Dissolved Organic Matter Induced by Plastic Debris
Researchers investigated how plastic debris influences fluorescent dissolved organic matter (FDOM) in freshwater, contaminating river and tap water samples under controlled laboratory conditions and assessing bacterial proliferation via fluorescence spectroscopy, dynamic light scattering, and flow cytometry. The study found that plastic-derived FDOM affected the dissolved-particulate organic matter continuum and altered bacterial cell proliferation, demonstrating that fluorescence spectroscopy can effectively identify plastic FDOM in water samples of various origins.
Photochemical reactivity of water-soluble dissolved organic matter from microplastics and microfibers
When microplastics and microfibers sit in water, they leach dissolved organic matter (DOM) that can react with sunlight to produce reactive chemicals. This study found that the type and amount of DOM released depends heavily on polymer chemistry, with aromatic plastics like PET and polystyrene releasing more light-absorbing DOM, and microfibers releasing more DOM overall than microplastic particles. Understanding how plastic-derived DOM breaks down in sunlight is important because these chemical by-products can interact with other aquatic pollutants and affect aquatic ecosystems in ways not yet fully understood.
Characterization of microplastic-derived dissolved organic matter in freshwater: Effects of light irradiation and polymer types
Researchers examined how different types of microplastics release dissolved organic matter into freshwater under light and dark conditions. They found that polypropylene released the most organic compounds after UV exposure, while protein-like substances were the main material released by most plastics in the dark. The study indicates that microplastics may have ongoing, long-term effects on water chemistry and microbial activity in natural water bodies.
Optical measurement technologies for detecting low levels of pollution and identifying microplastics in water
Researchers reviewed optical technologies for detecting and identifying microplastics in water, experimentally characterizing the fluorescence spectra of PE and PET microplastic samples under 365 nm excitation and identifying spectral bands enabling identification of different polymer types, then proposing a comprehensive hardware solution using a fluorescent probe for microplastic visualization.
Photo-induced leaching behaviors and biodegradability of dissolved organic matter from microplastics and terrestrial-sourced particles
Researchers studied how light exposure causes microplastics and terrestrial particles to leach dissolved organic matter, and how this leachate behaves in the environment. The study found differences in the biodegradability of leachate from plastic versus natural sources, suggesting that microplastic-derived organic matter may persist differently in aquatic ecosystems.
Impact of light-aged microplastic on microalgal production of dissolved organic matter
Light-aged PVC microplastics decreased the biomass of green microalga Chlamydomonas reinhardtii by 43% and reduced dissolved organic matter production by 38% over 28 days, while also modifying the chemical composition of the DOM produced, including increasing its aromaticity and fluorescence.
Size and Structure-Dependent Molecular Fingerprint Transformation of Microplastic-Derived Dissolved Organic Matter in Sunlit Seawater: Implication for Marine Carbon Cycles
This study examined how the size and structure of microplastics influence the photochemical transformation of MP-derived dissolved organic matter under UV irradiation, finding that inherent plastic properties determine the molecular character of DOM released and its effects on ocean carbon cycling.
Copper-binding properties of microplastic-derived dissolved organic matter revealed by fluorescence spectroscopy and two-dimensional correlation spectroscopy
Dissolved organic matter (DOM) leached from different types of microplastics was characterized for its ability to bind copper ions, using fluorescence spectroscopy. Microplastic-derived DOM showed significant copper-binding capacity that varied by polymer type, suggesting that microplastic leachate can influence heavy metal speciation and bioavailability in aquatic environments.
Characteristics of microplastic-derived dissolved organic matter and its binding with pharmaceuticals unveiled by fluorescence spectroscopy and two-dimensional correlation spectroscopy
Researchers characterized dissolved organic matter released by microplastics during UV-driven aging and examined how it interacts with pharmaceutical compounds. They found that aged polyethylene terephthalate and polystyrene microplastics release fluorescent organic substances that can bind with antibiotics like chloramphenicol and carbamazepine. The study suggests that microplastic degradation byproducts may influence the environmental fate and transport of pharmaceutical pollutants in water.
Review of decisive factors for controlling generation and environmental effect of dissolved organic matter from (micro)plastics.
This review examines the composition, formation mechanisms, and environmental risks of dissolved organic matter (DOM) derived from plastics, identifying key controlling factors such as UV irradiation, temperature, and microbial activity, and assessing DOM's potential ecological impacts including toxicity and facilitation of contaminant transport.
Microplastic-derived dissolved organic matter and its biogeochemical behaviors in aquatic environments: A review
This review examines how microplastics release dissolved organic matter (MP-DOM) as they break down in water, and how these released chemicals affect water ecosystems. MP-DOM can interact with other pollutants and alter carbon cycling in natural waters, with the type and amount varying based on plastic composition and weathering conditions. Understanding what microplastics release into water as they degrade is important because these dissolved chemicals may have their own toxic effects on aquatic life and water quality.
Molecular fingerprints of dissolved organic matter leached from microplastics over prolonged photochemical aging: Implications for aquatic carbon cycling
Researchers used ultra-high-resolution mass spectrometry to identify the dissolved organic molecules that leach from polypropylene, polyethylene, and polystyrene microplastics after prolonged exposure to sunlight. They found that polystyrene released the most diverse array of molecules, many of which could persist in water systems. The study suggests that as microplastics degrade in sunlight, they release non-natural organic compounds that may affect the aquatic carbon cycle from rivers to oceans.
Source-specific quantification of microplastic-derived dissolved organic matter in sludge liquor using δ13C-labeled sludge and isotopic fingerprinting under varying conditioning treatments
Source-specific dissolved organic matter released by microplastics was quantified and characterized, revealing that different polymer types leach distinct chemical profiles into water. These leachates can alter aquatic chemistry and microbial communities in ways specific to the plastic source.
Photoreactivity of microplastic-derived dissolved organic matter governed by its oxygen-containing functional groups in hydrophobic/hydrophilic fractions rather than molecular weights
This study investigated the photoreactivity of dissolved organic matter (DOM) released by degrading microplastics, analyzing how its molecular structure governs how it responds to light. The researchers found that oxygen-containing functional groups in hydrophobic and hydrophilic fractions — rather than molecular weight — were the key drivers of photoreactivity.
Polystyrene microplastics increase microbial release of marine Chromophoric Dissolved Organic Matter in microcosm experiments
Researchers found that polystyrene microplastics increased microbial release of chromophoric dissolved organic matter (CDOM) in marine microcosm experiments, suggesting that microplastics can alter microbial community dynamics and influence the optical properties and carbon cycling of marine waters.
Detection and Characterisation of Micro- and Nano-plastics in Water using Optical Spectroscopy
This thesis explored photoluminescence spectroscopy as an alternative technique for detecting and characterizing micro- and nanoplastics in water, optimizing fluorescence excitation-emission features and comparing performance against conventional spectroscopic approaches.
Insights into the photosensitivity and photobleaching of dissolved organic matter from microplastics: Structure-activity relationship and transformation mechanism
This study investigated the photosensitivity and photobleaching behavior of dissolved organic matter released from microplastics (MPDOM), examining how physicochemical properties of different plastics influence photoactivation and transformation. The structure-activity analysis revealed that MPDOM composition strongly determines its photoreactivity, affecting how microplastic-derived organic compounds interact with sunlight and generate reactive oxygen species in aquatic environments.
Molecular Signatures of Dissolved Organic Matter Generated from the Photodissolution of Microplastics in Sunlit Seawater
Researchers incubated polyethylene, polypropylene, and expanded polystyrene microplastics in sunlit seawater and characterized the dissolved organic matter produced as the plastics broke down. The study found that sunlight generated hundreds of unique oxygen-containing chemical products from each plastic type, while virtually none were produced in the dark. Evidence indicates that a single process, photodegradation, can transform simple plastic polymers into a complex array of dissolved organic chemicals in ocean environments.
Characteristics and mechanisms of dissolved organic matter leached by photodegradation of polyethylene microplastics: role of adsorbed antibiotics
Researchers investigated how UV-driven photoaging of polyethylene microplastics and their interactions with the antibiotic ofloxacin affect the release of dissolved organic matter in water. They found that UV exposure significantly increased DOM release from pristine microplastics, while antibiotic-adsorbed microplastics initially released different molecular weight compounds before converging to similar patterns. The study reveals that aging microplastics and their co-contaminants create complex secondary pollution dynamics in aquatic environments.