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61,005 resultsShowing papers similar to Analysis of microplastic particles in the Pilica River catchment (Poland) using FTIR imaging microscopy
ClearAnalysis of microplastic particles in the Pilica River catchment (Poland) using FTIR imaging microscopy
Researchers analyzed microplastic distribution across the Pilica River catchment in Poland, assessing contributions from wastewater treatment plants as a key point source. Wastewater treatment plant effluents were identified as a major pathway for microplastic entry into the river system.
Microplastics in two German wastewater treatment plants: Year-long effluent analysis with FTIR and Py-GC/MS
Researchers analyzed microplastics in the effluents of two German wastewater treatment plants monthly over one year, revealing temporal variations in microplastic concentrations and polymer compositions entering receiving river systems.
Microplastic in Danish wastewater: Sources, occurrences and fate
Researchers evaluated the role of Danish wastewater treatment plants in microplastic emissions by analyzing samples from 10 WWTPs, associated sludge, and farmland soils using FTIR imaging, identifying the amounts, polymer types, and potential sources of microplastics entering the environment.
Microplastics in the effluent of a German wastewater treatment plant ‒ analysis with μ-FTIR spectroscopy
A German wastewater treatment plant was found to release microplastics in its treated effluent, with fibers as the dominant type. The study used detailed chemical characterization and identified wastewater plants as ongoing point sources of microplastic pollution entering aquatic environments.
Microplastic Monitoring at Different Stages in a Wastewater Treatment Plant Using Reflectance Micro-FTIR Imaging
Researchers used reflectance micro-FTIR imaging to monitor microplastic presence at multiple treatment stages within a wastewater treatment plant, addressing the challenge of analyzing MPs in biogenic organic matter-rich matrices. The study mapped how microplastic identity, abundance, and size distribution changed through primary and secondary treatment, providing insight into WWTP contributions to aquatic microplastic pollution.
Multi-temporal surveys for microplastic particles enabled by a novel and fast application of SWIR imaging spectroscopy – Study of an urban watercourse traversing the city of Berlin, Germany
Researchers applied short-wave infrared (SWIR) imaging spectroscopy to rapidly identify and classify microplastic particles in surface water samples from an urban Berlin waterway across six time points, finding that plastic concentrations increased downstream of urban areas and after rainfall events, and that wastewater treatment plant effluent contributed measurably to the plastic load.
Microplastics monitoring in different environments: separation, physicochemical characterization, and quantification
Researchers systematically monitored microplastic contamination across multiple environments including a wastewater treatment plant, surrounding water bodies, and soils near plastic factories, characterizing shape, size, color, and polymer composition via microscopy and FTIR spectroscopy. They found fragments and fibers to be the most common microplastic shapes in water environments and documented simultaneous contamination across all sampled matrices.
Identification of microplastic in effluents of waste water treatment plants using focal plane array-based micro-Fourier-transform infrared imaging
Researchers analyzed effluent from 12 wastewater treatment plants in Germany and found microplastics in all of them, with estimates of up to 4 billion particles discharged per plant annually — predominantly polyethylene fragments and polyester fibers. Notably, one plant with an additional post-filtration step reduced microplastic discharge by 97%, showing that advanced filtration can dramatically cut the flow of plastic particles into waterways.
Tracking microplastics at the source: a comparative study of fluorescent and FTIR microscopy at a drinking water intake in the Perak River, Malaysia
Researchers measured microplastic contamination at a drinking water intake point on the Perak River in Malaysia, finding 12 different polymer types with most particles smaller than 10 micrometers. The study compared two detection methods and found that specialized infrared microscopy was more accurate at identifying microplastic types than fluorescence microscopy. Since this river water goes directly to a treatment plant for drinking water, the findings highlight the need to understand and filter out microplastics before they reach the tap.
Microplastics in the Florence wastewater treatment plant studied by a continuous sampling method and Raman spectroscopy: A preliminary investigation
Researchers used continuous sampling and Raman spectroscopy to track microplastics through a Florence wastewater treatment plant, finding that the plant reduces but does not eliminate microplastic loads, with effluent contributing a quantifiable flux to the receiving river.
Source, Identification, Distribution, and Abundance of Microplastics in Rivers and Their Ecological Impacts: a Review
This review synthesizes global data on microplastic sources, identification methods, distribution in rivers, and ecological impacts, covering studies from the past two decades. It finds MPs widespread in riverine systems (up to 120 MPs/L in water, 13,607 MPs/kg in sediment), with FTIR and Raman spectroscopy as dominant identification tools and PE/PP fibers and fragments as the most common polymer types.
Microplastic pollution in typical seasonal rivers in northern China: temporal variation and risk assessment
Researchers quantified microplastic abundance and composition in surface water of the Wei River across dry and wet seasons, finding significantly higher MP concentrations in the dry season with polypropylene and polyethylene fibers dominating, and conducted polymer-level risk assessment using FTIR and Raman spectroscopy.
Laboratory assessment for determining microplastics in freshwater systems – characterization and identification along Somesul Mic River
Researchers applied Raman and FTIR spectroscopy alongside microscopy to characterize microplastics in water and sediment samples from the Somesul Mic River in Romania, identifying multiple polymer types and assessing which analytical methods worked best. Developing reliable, standardized laboratory methods for detecting microplastics in freshwater is essential for generating comparable data on environmental contamination levels.
Quantification of microplastic mass and removal rates at wastewater treatment plants applying Focal Plane Array (FPA)-based Fourier Transform Infrared (FT-IR) imaging
This study quantified microplastic mass and calculated removal rates at wastewater treatment plants, finding that while plants remove a large proportion of incoming microplastics, the residual discharge still represents a substantial ongoing input to receiving water bodies.
Wastewater Treatment Works (WwTW) as a Source of Microplastics in the Aquatic Environment
Researchers investigated wastewater treatment works as a source of microplastics in aquatic environments, finding that effluent discharges contribute measurable quantities of microplastics to receiving rivers despite treatment, with concentrations varying by treatment type.
Insights Into Microplastics Pollution in Aquatic Ecosystem: a Short Review of Sampling and Analysis Methods
This review summarizes current methods for sampling and analyzing microplastics in rivers and estuaries, including techniques like FTIR and Raman spectroscopy for polymer identification. The authors highlight the need for standardized sampling and analysis methods to ensure that microplastic data across different studies are reliable and comparable.
Microplastic particle emission from wastewater treatment plant effluents into river networks in Germany: Loads, spatial patterns of concentrations and potential toxicity
Researchers estimated annual microplastic particle emissions from wastewater treatment plants into Germany's ten major river basins and analyzed spatial concentration patterns across stream orders. The study found that while treatment plants are point sources of microplastic pollution, the spatial organization of facilities along river networks creates predictable downstream concentration patterns with potential ecological implications.
Spectroscopic analysis of microplastic contaminants in an urban wastewater treatment plant from Seoul, South Korea
Researchers performed systematic multi-spectroscopic analysis of microplastics at influent and effluent stages of a metropolitan wastewater treatment plant in Seoul, South Korea, using FTIR and microscopic methods to characterize MP type, size, and polymer composition. The study quantified treatment efficiency for MP removal and identified the dominant polymer types entering and leaving the WWTP, informing efforts to reduce microplastic discharge to urban waterways.
Microplastics in Influents and Effluents of Estonian Wastewater Treatment Plants
This Estonian study is the first systematic investigation of microplastic concentrations in both the influent and effluent of Estonian wastewater treatment plants, using continuous filtration sampling and FTIR spectroscopy. The research establishes baseline data for microplastic removal efficiency in Baltic state wastewater infrastructure, documenting how treatment reduces but does not eliminate microplastic discharge.
Microplastiche: classificazione, identificazione e rimozione all'interno degli impianti di trattamento delle acque reflue
This Italian-language paper reviews how microplastics are classified, identified using techniques like FTIR spectroscopy, and removed in wastewater treatment plants. Conventional treatment plants remove a substantial portion of microplastics but still allow many particles to pass through into the environment. The review calls for better treatment technologies and standardized methods to assess microplastic removal efficiency.
Microplastics in Estonian wastewater treatment plants: First evaluation of baseline concentrations and stage-wise removal efficiency
Researchers sampled six Estonian wastewater treatment plants to establish baseline microplastic concentrations in influents and effluents and assess stage-wise removal efficiency. At least 78% of microscopically identified MPs were confirmed by µFTIR spectroscopy, with at least 50% removed during secondary treatment, providing the first baseline data for Estonian WWTP microplastic discharge into the Baltic Sea.
Wastewater treatment plants as a source of microplastics in river catchments
Microplastic concentrations were measured upstream and downstream of six wastewater treatment plants in different catchments, finding that all plants discharged microplastics but that concentrations in river water were influenced by factors beyond just WWTP effluent. The results suggest wastewater treatment plants are significant but not the only source of microplastics in river catchments.
Depth-wise Distribution of Microplastics Around Teluk Lerong Intake, the Mahakam River: Implications for Water Treatment Processes
Researchers assessed the depth-wise distribution, abundance, size, and polymer types of microplastics in the water column of the Mahakam River at the Teluk Lerong intake in Samarinda City, Indonesia, using composite sampling and multi-stage filtration with FTIR analysis. The study found microplastics present across all sampled depth levels, with implications for the treatment processes used by the regional drinking water company sourcing water from this intake.
Exploration of microplastic pollution with particular focus on source identification and spatial patterns in riverine water, sediment and fish of the Swat River, Pakistan
Researchers investigated microplastic pollution in water, sediment, and fish from Pakistan's Swat River, using ATR-FTIR spectroscopy to characterize the polymers and principal component analysis to identify likely sources of the contamination.