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20 resultsShowing papers similar to Machine learning-enabled meta-analysis reveals the effect of microplastics on nitrogen removal performance in constructed wetlands and its potential mechanisms
ClearMicroplastics occurrence and fate in full-scale treatment wetlands
Researchers assessed microplastic occurrence and fate across full-scale treatment wetlands, finding that constructed wetlands effectively remove a significant proportion of MPs from wastewater but that removal efficiency varies with wetland design and MP characteristics.
Impact of microplastics on the treatment performance of constructed wetlands: Based on substrate characteristics and microbial activities
Researchers found that polystyrene microplastic accumulation in constructed wetlands initially improved nitrogen removal efficiency but ultimately impaired treatment performance over a 370-day experiment, altering substrate characteristics and microbial community activities.
A review on the fate of micro and nano plastics (MNPs) and their implication in regulating nutrient cycling in constructed wetland systems
This review examines how micro- and nanoplastics interact with the biological, chemical, and physical processes in constructed wetlands, which are nature-based systems used to treat wastewater. Researchers found that these tiny plastics can interfere with nitrogen and phosphorus removal by affecting the microbial communities, plant health, and substrate chemistry within the wetlands. The study highlights that as microplastic levels increase in wastewater, their presence could reduce the overall treatment effectiveness of these green infrastructure systems.
The crucial factor for microplastics removal in large-scale subsurface-flow constructed wetlands
This study used field data from large-scale subsurface-flow constructed wetlands combined with machine learning to identify which design and operational parameters most critically determine microplastic removal efficiency. Hydraulic retention time and plant density were the dominant controlling factors, providing evidence-based design guidance for optimizing constructed wetlands for microplastic treatment.
Polystyrene microplastics accumulation in lab-scale vertical flow constructed wetlands: impacts and fate
Researchers tested how polystyrene microplastics affect constructed wetlands, a nature-based system used to treat wastewater. They found that while the wetlands still removed most pollutants effectively, nitrogen removal decreased by up to 5% in the presence of microplastics, and the particles accumulated mainly in the upper layers of the wetland substrate. The study suggests that microplastics can alter the microbial communities responsible for breaking down nitrogen in these treatment systems.
Unveiling the microplastic perturbation on surface flow constructed wetlands with macrophytes of different life forms: Responses of nitrogen removal and sensory quality
Polystyrene microplastics initially boosted nitrogen removal in constructed wetlands used for water treatment, but over time they reduced removal efficiency by 25-34% and harmed the beneficial bacteria responsible for cleaning the water. This means microplastic contamination could undermine natural water treatment systems that communities rely on for clean water.
A review on the remediation of microplastics using constructed wetlands: Bibliometric, co-occurrence, current trends, and future directions
This review examined the use of constructed wetlands as a nature-based solution for removing microplastics from water, analyzing research trends and knowledge gaps through bibliometric analysis. Researchers found that constructed wetlands show promise for microplastic remediation, but significant barriers remain in understanding the removal mechanisms involved. The study identifies key research directions needed to optimize wetland design for effective microplastic pollution control.
Microplastics profile in constructed wetlands: Distribution, retention and implications
This study assessed microplastic distribution, retention, and implications within constructed wetlands used for wastewater treatment, finding that wetlands trap substantial quantities of MPs but that retention efficiency varies by plant species and wetland design. The results suggest constructed wetlands both remove and potentially accumulate MPs as a secondary pollution source.
Microplastics removal mechanisms in constructed wetlands and their impacts on nutrient (nitrogen, phosphorus and carbon) removal: A critical review
This review examines how constructed wetlands can filter microplastics from water and what effect those trapped microplastics have on the wetlands' ability to remove nutrients. Researchers found that substrate type, plant species, and water flow patterns are key factors determining how well wetlands capture microplastics. The study also notes that accumulated microplastics can alter the microbial communities responsible for breaking down nitrogen, phosphorus, and carbon in these systems.
Nanoplastics Disturb Nitrogen Removal in Constructed Wetlands: Responses of Microbes and Macrophytes
The impact of nanosized plastics on nitrogen removal in constructed wetlands was investigated by examining microbial community responses and denitrification processes. Nanoplastics disturbed biological nitrogen removal in the wetland system, with microorganisms showing altered community structure and reduced denitrification efficiency.
Mechanistic insights into microplastic-mediated shifts in nitrogen metabolism and sensory quality across emergent and submerged-plant wetlands: Evidence from metagenomics and physiological indicators
Researchers exposed surface-flow constructed wetlands planted with emergent and submerged macrophytes to polystyrene microplastics and found a 12.64% reduction in total nitrogen removal in the emergent plant system, driven by shifts in nitrogen-cycling microbial communities. PS-MPs also altered sensory water quality indicators, with effects varying by plant type.
The fate of microplastics/nanoplastics (MPs/NPs) in constructed wetlands: Addressing methodological gaps and experimental challenges from lab-scale to full-scale
This review examines the effectiveness of constructed wetlands for removing micro- and nanoplastics from water, comparing laboratory and full-scale results. Researchers found that while constructed wetlands show promising removal capabilities, the unique physical and chemical properties of plastic particles mean that lab-scale efficiencies may differ significantly from real-world performance, highlighting the need for more field-scale studies.
Recent advances towards micro(nano)plastics research in wetland ecosystems: A systematic review on sources, removal, and ecological impacts
Wetland ecosystems act as important sinks for micro- and nanoplastics, which were found to cause ecotoxicological effects on wetland plants, animals, and microbial communities, including shifts in microbial composition relevant to pollutant removal. Micro/nanoplastics exposure also affected conventional pollutant removal efficiency and greenhouse gas emissions from wetland systems.
Heightened threat of aged microplastics in constructed wetlands: impacts on nitrogen cycles and greenhouse gas emissions
Researchers studied the effects of aged fibrous microplastics on nitrogen cycling and greenhouse gas emissions in constructed wetlands and found that high concentrations of aged MPs reduced nitrogen removal efficiency and increased N₂O emissions compared to pristine MPs. The results suggest aging intensifies the environmental disruption caused by microplastics in treatment wetlands.
Plant Based Application for Microplastic Removal in Constructed Wetlands: A Mini Review
This mini-review examines how wetland plants in constructed wetlands capture and degrade microplastics through physical entrapment, root-zone interactions, and microbial activity, assessing operational factors that determine removal efficiency.
Effects of macrophytes on micro – And nanoplastic retention and cycling in constructed wetlands
This study tested how the presence of aquatic plants (macrophytes) in constructed wetlands affects the capture and cycling of micro- and nanoplastics. Researchers found that planted wetlands were significantly better at intercepting nanoplastics and also improved nitrogen and phosphorus removal even when exposed to plastic particles. The findings suggest that including macrophytes in constructed wetland designs can enhance their ability to manage plastic pollution in water.
Fate and removal of microplastics in unplanted lab-scale vertical flow constructed wetlands
Laboratory-scale unplanted vertical flow constructed wetlands were shown to remove microplastics from wastewater, with removal efficiency influenced by particle size, shape, and flow rate, highlighting constructed wetlands as a nature-based option for microplastic mitigation.
Impact of separate concentrations of polyethylene microplastics on the ability of pollutants removal during the operation of constructed wetland-microbial fuel cell
Researchers investigated how polyethylene microplastics at different concentrations affect constructed wetland microbial fuel cells over 360 days, finding that COD and phosphorus removal remained stable but nitrogen removal and power generation declined as microplastic concentrations increased.
Critical role of benthic fauna in enhancing nanoplastics removal in constructed wetland: Performance, fate and mechanism
Researchers found that adding benthic fauna such as clams and worms to constructed wetlands significantly improved the removal of nanoplastics from wastewater. The organisms enhanced microbial activity and biofilm formation, which helped trap and break down the tiny plastic particles more effectively. The study suggests that incorporating natural organisms into wetland treatment systems could be a practical strategy for addressing nanoplastic pollution.
Microplastic removal and risk assessment framework in a constructed wetland for the treatment of combined sewer overflows
Researchers assessed microplastic removal performance in a full-scale constructed wetland treating combined sewer overflows and developed a risk assessment framework for these events. They found that the wetland effectively reduced microplastic concentrations, though removal rates varied across different overflow events. The study provides evidence that constructed wetlands can serve as a practical nature-based solution for mitigating microplastic pollution from urban sewer systems.