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20 resultsShowing papers similar to Impact of microplastics on the treatment performance of constructed wetlands: Based on substrate characteristics and microbial activities
ClearPolystyrene 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.
Distribution and removal of microplastics in a horizontal sub-surface flow laboratory constructed wetland and their effects on the treatment efficiency
Researchers investigated microplastic retention in a laboratory-scale constructed wetland, finding that the wetland effectively captured microbeads and fibers while examining how accumulated microplastics affected the treatment efficiency for carbon, nitrogen, and phosphorus removal.
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.
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.
Characteristics analysis of plastisphere biofilm and effect of aging products on nitrogen metabolizing flora in microcosm wetlands experiment
Researchers placed three types of plastic in miniature constructed wetlands for 180 days and tracked how they aged and affected microbial communities. The plastics degraded at different rates, with PVC developing new chemical groups and all surfaces becoming less water-repellent as bacteria colonized them. The plastic surfaces altered nitrogen-processing bacteria in the wetland water, suggesting microplastics can disrupt nutrient cycling in natural wetland ecosystems.
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.
Microplastics 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.
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.
Machine learning-enabled meta-analysis reveals the effect of microplastics on nitrogen removal performance in constructed wetlands and its potential mechanisms
This meta-analysis of 1,903 datasets found that microplastics impair nitrogen removal in constructed wetlands, with dosage frequency and exposure duration being the primary factors. Machine learning models revealed that microplastic characteristics interact with wetland conditions in complex ways, potentially undermining the effectiveness of these natural wastewater treatment systems.
Comprehensive metagenomic and enzyme activity analysis reveals the negatively influential and potentially toxic mechanism of polystyrene nanoparticles on nitrogen transformation in constructed wetlands
Researchers exposed constructed wetlands to polystyrene nanoparticles and found that even 1–10 mg/L concentrations suppressed denitrification and nitrification enzyme activities, reduced the abundance of nitrogen-cycling microbial genes, and generated oxidative stress in both macrophytes and microorganisms — disrupting the nitrogen transformation essential to wetland water-purification function.
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.
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.
Response of aerobic granular sludge under acute inhibition by polystyrene microplastics: Activity, aggregation performance, and microbial analysis
Researchers investigated how different concentrations of polystyrene microplastics affect the performance of aerobic granular sludge used in wastewater treatment. The study found that increasing microplastic concentrations inhibited nitrogen removal rates and disrupted the microbial community structure within the sludge. Evidence indicates that microplastic contamination in wastewater can compromise the effectiveness of biological treatment processes.
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.
Microplastic Identification in Domestic Wastewater-Treating Constructed Wetlands and Its Potential Usage in a Circular Economy
Researchers identified and characterized microplastics in constructed wetlands used for treating domestic wastewater, finding MP accumulation in the substrate and plants and assessing how well these nature-based treatment systems retain plastic particles before effluent is discharged.
Horizontal subsurface flow constructed wetlands as tertiary treatment: Can they be an efficient barrier for microplastics pollution?
Horizontal subsurface-flow constructed wetlands used as tertiary wastewater treatment removed 88% of microplastics from secondary effluent, contributing to an overall 98% reduction across the full treatment plant. Macroinvertebrates living in the wetland also ingested microplastics, suggesting biological uptake plays a role in plastic retention within the wetland ecosystem.
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.
Microplastics shaped performance, microbial ecology and community assembly in simultaneous nitrification, denitrification and phosphorus removal process
This study found that polystyrene and PVC microplastics disrupted the performance of wastewater treatment systems designed to remove nitrogen and phosphorus, reducing nitrogen removal by up to 10%. The microplastics altered microbial communities, decreased cooperation between beneficial bacteria, and blocked important biological pathways. Since wastewater treatment is a key barrier against pollution reaching drinking water, microplastic interference with these systems could indirectly increase human exposure to harmful contaminants.
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.