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61,005 resultsShowing papers similar to Municipal effluent as a potential source of microplastics in the aquatic environment
ClearWastewater treatment plant effluent as a source of microplastics: review of the fate, chemical interactions and potential risks to aquatic organisms
This review examines wastewater treatment plant effluent as a source of microplastics entering aquatic environments. The study found that even though treatment plants remove most microplastics, the small amounts remaining in effluent may still contribute significantly to environmental contamination, and the chemical interactions between microplastics and other pollutants in wastewater raise additional ecological concerns.
A Survey of Microplastic Pollution from Wastewater Treatment Plant Effluent Within the Lake Champlain Basin
A survey of wastewater treatment plant effluent found that microplastics — primarily fibers from synthetic clothing — pass through treatment processes and are discharged to waterways. The study highlights treated wastewater as a major pathway for microfiber microplastics to enter rivers and coastal waters.
Wastewater as a potential source of microplastics in aquatic environments
This conference abstract reviews how wastewater and wastewater treatment plants are significant sources of microplastics — from cosmetic microbeads and synthetic textile fibers — entering the environment. It highlights that even treated wastewater effluent and sewage sludge spread onto farmland continue to release microplastics.
Microfibers from synthetic textiles as a major source of microplastics in the environment: A review
This review examines how synthetic textile garments release thousands of microplastic fibers during each wash cycle, making laundry a major source of microplastic pollution. Even though wastewater treatment plants capture most fibers, billions still escape into waterways each day because the incoming volume is so enormous. These fibers end up in rivers, oceans, and soil, where they can be consumed by aquatic life and eventually reach humans through the food chain.
A Review of the Origins of Microplastics arriving at Wastewater Treatment Plants
This review synthesizes the origins of microplastics entering wastewater treatment plants, examining contributions from household sources, industrial and commercial discharges, and urban surface runoff conveyed through sewerage systems. The authors identify the diversity of microplastic sources reaching treatment facilities as a key challenge for effective removal, with implications for downstream aquatic pollution from treated effluent.
Microplastic pollution is widely detected in US municipal wastewater treatment plant effluent
Researchers conducted a wide survey of US municipal wastewater treatment plants and found microplastics widely present in effluent, confirming that conventional treatment does not fully remove microplastics and that treatment plants are ongoing sources of environmental contamination.
Evaluating wastewater effluent as a source of microplastics in environmental samples
This book chapter evaluates wastewater effluent as a source of microplastics in environmental samples, reviewing evidence of microplastic presence in freshwater systems, wastewater treatment plants, and associated biota. Researchers found that wastewater treatment plants are a significant conduit for microplastics into freshwater and marine environments despite their partial removal capacity.
Occurrence, Characteristics, and Removal of Microplastics in Wastewater Treatment Plants
This review summarizes the occurrence, characteristics, and removal efficiency of microplastics in wastewater treatment plants, highlighting how these facilities simultaneously act as sinks trapping microplastics and as sources releasing them into surrounding aquatic and terrestrial environments.
Micro- and nanoplastic pollution in urban influenced aquatic environments: Sources, pathways, and remediation strategies
This review examines the sources, transport pathways, and environmental fate of microplastics and nanoplastics in urban aquatic environments, finding that wastewater treatment plants remove only 40–95% of microplastics with much lower efficiency for nanoplastics, making them a persistent source of aquatic contamination.
Toward a Better Understanding of the Contribution of Wastewater Treatment Plants to Microplastic Pollution in Receiving Waterways
This review examines how wastewater treatment plants (WWTPs) contribute to microplastic pollution in receiving waterways, synthesizing evidence on removal efficiencies of different treatment stages and the characteristics of microplastics that escape into the environment. Researchers found that while WWTPs remove the majority of incoming microplastics, they remain a significant source of microplastic discharge due to the large volumes of wastewater processed daily.
Microplastics removal in wastewater treatment plants: a critical review
This critical review of microplastic removal in wastewater treatment plants examines removal efficiencies across different treatment stages, finding that while WWTPs remove the majority of microplastics from influent, they still release millions of particles daily and are a major pathway for microplastics entering aquatic environments.
Microplastics in wastewater treatment plants: Sources, properties, removal efficiency, removal mechanisms, and interactions with pollutants
This review examines microplastic sources, properties, removal efficiency, and removal mechanisms across different wastewater treatment plant stages. Researchers found that while treatment plants remove a significant portion of microplastics, they cannot eliminate them entirely, resulting in the continued release of millions of particles into the environment daily through effluent and sludge.
Removal of microplastic particles during municipal wastewater treatment: A current review
This review examines how effectively municipal wastewater treatment plants remove microplastics before discharging water into the environment. Researchers found that while advanced treatment can remove over 98% of microplastics, large facilities may still release billions of particles daily, especially nanoplastics smaller than 1 micrometer that are harder to capture. The study suggests that additional purification steps and improved existing processes are needed to better protect waterways from microplastic contamination.
Microplastic removal and environmental emissions from municipal wastewater treatment plants
This study measured microplastic levels in wastewater entering and leaving five treatment plants using different technologies, finding that while plants remove a large portion of microplastics, they still release significant amounts into the environment through treated water. Since wastewater effluent flows into rivers and oceans that supply drinking water and food sources, this ongoing release is a concern for human exposure.
Influence of wastewater treatment process on pollution characteristics and fate of microplastics
Researchers investigated microplastic abundance and removal efficiency across four wastewater treatment plants using different treatment technologies, finding influent concentrations between 539 and 1,290 particles per liter that were reduced substantially by primary and secondary treatment. Smaller microplastic particles proved hardest to remove and most likely to persist in final effluent.
Wastewater Treatment Approaches to Remove Microplastics
This review summarizes current approaches for removing microplastics from wastewater, noting that treatment plants capture many particles but are not fully effective — particularly for small fibers from laundry. Improving wastewater treatment efficiency is a key strategy for reducing the microplastic loads entering rivers and oceans.
Abundance and characteristics of microplastics in municipal wastewater treatment plant effluent: a case study of Guangzhou, China
This study quantified microplastics in the effluent of a large wastewater treatment plant in Guangzhou, China, finding that the plant releases hundreds of millions of microplastic particles per day despite removing most particles during treatment. Even highly efficient wastewater treatment plants are a significant ongoing source of microplastics entering rivers and coastal waters.
Effectiveness of conventional municipal wastewater treatment plants in microplastics removal: Insights from multiple analytical techniques
Researchers evaluated the effectiveness of conventional municipal wastewater treatment plants in removing microplastics across multiple treatment stages, finding removal efficiencies of 70–90% but documenting that billions of particles still pass through in final effluent daily.
Microplastics in Wastewater Treatment Plants: Characteristics, Occurrence and Removal Technologies
This review summarizes how wastewater treatment plants are a major pathway for microplastics entering the environment, covering the types, sizes, and sources of microplastics found in wastewater. While treatment plants can remove many microplastics, significant amounts still escape into rivers and oceans through treated water and sludge. The authors evaluate various removal technologies and recommend advanced treatment methods to better prevent microplastics from reaching water supplies.
The significant impacts of laundry wastewater on microplastics: a case study in a residential area
Researchers measured microplastic concentrations in laundry wastewater from a residential area and tracked their contribution to urban drainage, finding that laundry effluent is a significant and underestimated source of microfibers entering municipal sewer systems and subsequently rivers.
Fate of microplastics and other small anthropogenic litter (SAL) in wastewater treatment plants depends on unit processes employed
Researchers tracked the fate of microplastics and other small anthropogenic litter through a wastewater treatment plant, finding that most particles were removed but a substantial number passed through in the effluent. The study highlights that while treatment plants reduce microplastic loads, they cannot fully prevent plastic particles from reaching aquatic environments.
Evaluating wastewater effluent as a source of microplastics in environmental samples
This book chapter reviews how microplastics enter freshwater systems and wastewater treatment plants, and how these plants serve as both a partial barrier and a pathway for microplastics reaching rivers and oceans. Understanding wastewater as a vector is crucial for developing interventions that prevent microplastics from reaching ecosystems.
Characterization and removal efficiencies of microplastics discharged from sewage treatment plants in Southeast Spain
This four-year study of sewage treatment plants in southeast Spain found that while the plants removed 64 to 89 percent of microplastics, significant amounts still escaped into the environment. Advanced treatment was less effective at catching fibers compared to other particle shapes, and more microplastics of smaller sizes were found in autumn samples. The findings confirm that wastewater treatment plants are a major ongoing source of microplastic pollution entering waterways that communities depend on.
Microplastic occurrence and characteristics in a municipal wastewater treatment plant in Jakarta
A Jakarta wastewater treatment plant was found to remove about 91% of incoming microplastics, yet still discharged an estimated 352 microplastic particles per second into the aquatic environment. Fibers were the dominant shape, and particles ranged from 100 to 5,000 µm. This study highlights that even efficient treatment plants are significant ongoing sources of microplastic pollution in urban waterways.