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61,005 resultsShowing papers similar to Occurrence and Removal of Microplastics in Tertiary Wastewater Treatment Plants: A Case Study of Three Plants in Zhengzhou, China
ClearAbundance 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.
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.
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.
The Pollution Characteristics and Fate of Microplastics in Typical Wastewater Treatment Systems in Northern China
Researchers analyzed microplastic contamination at two wastewater treatment plants in Zhengzhou, China, finding overall removal efficiencies of about 93 and 96 percent respectively. Fibers and fragments were the most common microplastic shapes detected, with much of the removed material ending up concentrated in sewage sludge. The study raises concerns that while treatment processes are effective at reducing waterborne microplastics, the contaminated sludge may redistribute the pollution when applied to agricultural land.
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.
Abundance, Characteristics, and Removal of Microplastics in Wastewater Treatment Plant located in Southwest China
Researchers investigated microplastic abundance, characteristics, and removal efficiency at a wastewater treatment plant in Leshan, Southwest China, finding influent concentrations of 267.74 particles/L reduced to 68.34 particles/L in effluent, achieving a 74.48% total removal rate, with smaller particles (0.05-0.3 mm) being the most prevalent and hardest to remove.
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.
Distribution and occurrence of microplastics in wastewater treatment plants
Researchers investigated microplastic distribution in three industrial wastewater treatment plants in Vietnam, finding average removal efficiencies of only 21-26%, with billions of microplastic particles discharged daily into receiving waters from the largest plant.
Identification, Quantification, and Evaluation of Microplastics Removal Efficiency in a Water Treatment Plant (A Case Study in Iran)
Researchers investigated microplastic occurrence and removal efficiency across treatment stages of a drinking water treatment plant in Iran, finding an influent concentration of 1597.7 MPs/L with an overall removal efficiency of 83.7%, yet still discharging an estimated 2.25 x 10^11 MPs daily into the distribution system, with PP, PE, and PET as the dominant polymers.
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.
Occurrence Characterization and Contamination Risk Evaluation of Microplastics in Hefei’s Urban Wastewater Treatment Plant
Researchers characterized microplastic contamination at various stages of a wastewater treatment plant in Hefei, China, under both dry and rainy weather conditions. They found that while the treatment process removed a significant portion of microplastics, notable amounts still passed into the effluent, with rain increasing contamination levels. The study provides a detailed assessment of how effectively current wastewater treatment technology handles microplastic pollution.
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.
Evaluation of microplastic removal efficiency of wastewater-treatment plants in a developing country, Vietnam
Researchers evaluated microplastic removal efficiency at four wastewater treatment plants in Vietnam, finding removal rates of 92-99% but substantial daily microplastic loads still entering receiving waters through effluent discharge.
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.
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.
Distribution characteristics of microplastics in wastewater treatment plants in mega cities–the case study of Chengdu City
Researchers studied microplastic distribution and removal across wastewater treatment plant processes in China, finding that WWTPs intercept large quantities of MPs before discharge but that residual concentrations in effluent still represent a significant pathway for environmental MP release.
Assessment of Microplastics in a Municipal Wastewater Treatment Plant With Tertiary Treatment: Removal Efficiencies and Loading Per Day Into the Environment
Researchers measured microplastic removal efficiency at a Spanish wastewater treatment plant with advanced tertiary treatment, finding it removed about 97% of incoming microplastics but still discharged an estimated 4.6 million microplastic particles per day into the environment. Even high-efficiency treatment plants release substantial microplastic loads into receiving waters.
Occurrence and Removal Efficiency of Microplastics in Four Drinking Water Treatment Plants in Zhengzhou, China
Researchers sampled four drinking water treatment plants in Zhengzhou, China, and found microplastics in raw water (13–25 particles per litre) with only partial removal — fibers and fragments dominated, and the treatment process actually shifted polymer composition, with PET becoming the most prevalent type in finished drinking water. The study is significant because it demonstrates that standard treatment cannot fully eliminate microplastics from tap water, meaning that people are regularly consuming microplastics from treated municipal supplies.
Presence of Microplastic in Erzurum Urban Wastewater Treatment Plant
Researchers investigated microplastic presence at the inlet and outlet of the Erzurum Urban Wastewater Treatment Plant in Turkey, finding average concentrations of 36,400 MP/m3 in influent and 2,875 MP/m3 in effluent. Tertiary treatment achieved over 90% removal efficiency, while primary and secondary treatment alone proved insufficient for effective microplastic removal.
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.
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.
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.
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: 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.