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61,005 resultsShowing papers similar to The Pollution Characteristics and Fate of Microplastics in Typical Wastewater Treatment Systems in Northern China
ClearOccurrence and Removal of Microplastics in Tertiary Wastewater Treatment Plants: A Case Study of Three Plants in Zhengzhou, China
Researchers studied microplastic occurrence and removal efficiency at three wastewater treatment plants in Zhengzhou, China. The study found influent concentrations ranging from 147 to 289 particles per liter, with removal efficiencies between 76% and 91%, indicating that while treatment plants significantly reduce microplastic levels, substantial quantities still pass through to receiving waters.
Abundance and removal characteristics of microplastics at a wastewater treatment plant in Zhengzhou
Researchers investigated microplastic abundance and removal efficiency across treatment stages at a wastewater treatment plant in Zhengzhou, China, sampling sewage at each processing section to track migration and fate of microplastics. The study characterized removal rates and identified which treatment stages were most effective at capturing microplastic contaminants.
Characteristics and removal efficiency of microplastics in sewage treatment plant of Xi'an City, northwest China
Researchers systematically tracked microplastic transport, characteristics, and removal through both the sewage and sludge treatment streams of a Chinese wastewater treatment plant. The study found that while most microplastics were removed from effluent, substantial quantities accumulated in sludge.
Spatiotemporal Distribution Characteristics and Removal Efficiency of Microplastics in a Wastewater Treatment Plant
Researchers examined microplastic removal efficiency across three seasons at a wastewater treatment plant in Zhengzhou, China, sampling influent, process effluent, and final effluent. They found an overall removal efficiency of 86%, with polypropylene and polyethylene terephthalate as the dominant polymer types and fragment- and granule-shaped particles comprising over 80% of microplastics detected.
Fate of Microplastic Pollution Along the Water and Sludge Lines in Municipal Wastewater Treatment Plants
Researchers evaluated microplastic abundance and distribution across three municipal wastewater treatment plants using different treatment technologies. The study found that all three plants achieved greater than 97% microplastic removal along the water treatment line, with microplastics concentrating in the sludge fraction, underscoring the important role of sludge treatment in sequestering microplastics from wastewater.
Effects of different treatment processes in four municipal wastewater treatment plants on the transport and fate of microplastics
Researchers investigated microplastic transport and fate across four municipal wastewater treatment plants in southeastern China, finding that different treatment processes varied in their microplastic removal efficiency, with fibers and fragments as the dominant types.
Occurrence and Characteristics of Microplastics in a Wastewater Treatment Plant
Researchers sampled the inflow, outflow, and sludge of a Chinese wastewater treatment plant, finding up to 44 microplastic particles per liter in incoming water — mostly polyester fibers. The plant removed about 96% of microplastics, but the remaining fraction was still discharged into receiving waterways.
A review of the removal of microplastics in global wastewater treatment plants: Characteristics and mechanisms
This review analyzed data from 38 wastewater treatment plants across 11 countries to understand how effectively they remove microplastics. While treatment plants can remove the majority of microplastics from wastewater, significant quantities still pass through into waterways, and the microplastics captured in sewage sludge may re-enter the environment when that sludge is applied to farmland.
Abundance, morphology, and removal efficiency of microplastics in two wastewater treatment plants in Nanjing, China
Researchers investigated microplastic abundance, morphology, and removal efficiency at two wastewater treatment plants in Nanjing, China, finding four microplastic shapes including fragments, granules, films, and fibres across varying sizes and proportions. The study examined how treatment technology, operational parameters, and sewage source characteristics influenced microplastic removal rates.
The Effect of Wastewater Treatment Plants on Retainment of Plastic Microparticles to Enhance Water Quality—A Review
This review examined how well wastewater treatment plants remove microplastics, finding that most conventional systems achieve high removal rates but still discharge significant plastic quantities in treated effluent and sludge. Improving treatment efficiency and preventing sludge application to farmland are key strategies for reducing microplastic release.
Microplastics removal through water treatment plants: Its feasibility, efficiency, future prospects and enhancement by proper waste management
Researchers reviewed over 80 studies on water treatment plant performance and found microplastic removal ranges widely — from 16% in basic primary treatment up to near 100% with advanced membrane systems — but a major flaw is that removed microplastics concentrate in sludge, which can re-enter the environment. The review recommends optimizing coagulants and sludge treatment to prevent microplastics from simply being relocated rather than eliminated.
Microplastics in wastewater treatment plants and their contributions to surface water and farmland pollution in China
Researchers examined microplastic abundance in sewage and sludge at Shenzhen wastewater treatment plants, estimating that annual microplastic loading from WWTPs to surface water and farmland soil across China is substantial. WWTPs concentrate microplastics in sludge, which then becomes a major pathway for plastic contamination of agricultural land when applied as fertilizer.
Sources, fate, effects, and analysis of microplastic in wastewater treatment plants: A review
This review examines how wastewater treatment plants handle microplastics, finding that while they can remove over 90% of particles, the sheer volume of water processed means billions of microplastics still escape into waterways daily. The remaining microplastics also concentrate in sewage sludge, which is often spread on agricultural land. Wastewater treatment plants are both a filter for and a redistribution point of microplastic pollution.
Significant effects of rural wastewater treatment plants in reducing microplastic pollution: A perspective from China's southwest area
Researchers studied microplastic pollution at rural wastewater treatment plants in southwestern China and found influent concentrations of 3.8 to 8.2 particles per liter, with removal rates of only 14 to 55%. Based on national sewage discharge data, they estimated China's annual microplastic emissions through wastewater at nearly 3,000 tons, with rural areas contributing about 25%. The study highlights that rural wastewater systems, though often overlooked, represent a significant source of microplastic pollution entering waterways.
Microplastic abundance, characteristics, and removal in wastewater treatment plants in a coastal city of China
Researchers studied microplastic contamination across seven wastewater treatment plants in the coastal Chinese city of Xiamen and found that while treatment removed the vast majority of particles, the remaining microplastics still entered coastal waters in significant quantities due to high effluent volumes. Fibers and fragments were the most common microplastic types detected. The study underscores that wastewater treatment plants are both a barrier to and a source of marine microplastic pollution.
Distribution and removal mechanism of microplastics in urban wastewater plants systems via different processes
Researchers compared the microplastic removal efficiency of three wastewater treatment technologies and found that the anaerobic-anoxic-oxic process achieved the highest removal rate at 83.9%. Most microplastics were transferred to sludge during primary and secondary treatment stages, with dehydrated sludge containing significant concentrations. The study highlights that while wastewater treatment plants effectively intercept most microplastics, they also redistribute contamination to sludge, which may become a secondary pollution source.
Microplastic removal and management strategies for wastewater treatment plants
This review examines how well different wastewater treatment technologies remove microplastics and what management strategies can improve performance. While conventional treatment plants can remove a large percentage of microplastics from water, the particles often end up concentrated in sewage sludge that gets applied to farmland. The study highlights the need for advanced treatment options and better management of biosolids to prevent microplastics from simply being transferred from water to soil.
Recent advances on microplastics pollution and removal from wastewater systems: A critical review
This review summarizes the latest research on microplastic detection, occurrence, and removal in wastewater treatment plants. While treatment plants can remove 57-99% of microplastics depending on the stage, significant amounts still escape into the environment through treated water and sludge. The findings highlight the need for advanced treatment methods to prevent microplastics from reaching waterways and ultimately human water supplies.
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.
Nationwide evaluation of microplastic properties in municipal wastewater treatment plants in South Korea
Researchers evaluated microplastic levels at 22 municipal wastewater treatment plants across South Korea and found that while the plants remove over 99% of microplastics, the sheer volume of treated water still releases significant quantities into receiving waterways. Most removal happened during the sedimentation stage, and the most common microplastic types found were fragments and fibers under 300 micrometers. The study suggests that despite high removal efficiency, wastewater treatment plants remain an important source of microplastic discharge into the environment.
[Whole Process Analysis and Fate Behavior of Microplastics in Urban Wastewater Treatment Plants, Including their Occurrence Forms, Components, and Removal Efficiency].
A full-process analysis at a wastewater treatment plant in Hohhot, China found that fibrous microplastics were most abundant, accounting for 61.8 percent of total particles, with particle size and abundance changing across treatment stages. The study maps how microplastics migrate and what fraction is removed by each treatment step.
Occurrence and Removal of Microplastics in Wastewater Treatment Plants: Perspectives on Shape, Type, and Density
Researchers compiled data from multiple countries on microplastic removal efficiency across different stages of wastewater treatment plants. They found that removal rates varied widely, from 48% in some facilities to over 90% in others, depending on the treatment technologies employed. The study suggests that while conventional wastewater treatment can capture a significant portion of microplastics, advanced tertiary treatment methods are needed to further reduce discharge into the environment.
Understanding microplastic presence in different wastewater treatment processes: Removal efficiency and source identification
Researchers tracked microplastic removal across different treatment stages at two wastewater treatment plants and found overall removal rates of 90% and 97%. They discovered that population density in the served area was a bigger driver of influent microplastic levels than sewage volume, and that activated sludge served as the primary trap for captured particles. The study identified laundry washing and daily consumer products as the main sources of microplastics entering the treatment plants.
Microplastics in sewage sludge from the wastewater treatment plants in China
Researchers analyzed microplastics in sewage sludge from wastewater treatment plants across China, finding high concentrations of microplastics — predominantly fibers and fragments — raising concerns about their spread when sludge is applied to agricultural land.