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61,005 resultsShowing papers similar to Impact of separate concentrations of polyethylene microplastics on the ability of pollutants removal during the operation of constructed wetland-microbial fuel cell
ClearEffects of multi-microplastic mixtures on the performance of constructed wetland microbial fuel cells for wastewater treatment
Researchers tested how mixtures of four common microplastic types affect the performance of constructed wetland microbial fuel cells used for wastewater treatment. They found that while microplastics had minimal impact on organic matter removal, nitrogen removal efficiency dropped by about 20% due to suppression of key denitrifying bacteria. Interestingly, microplastics enhanced electricity generation by enriching electroactive bacteria like Geobacter in the fuel cell systems.
Evaluating Microplastic Effects on Performance and Electrochemistry of Microbial Fuel Cells for Wastewater Treatment
Researchers evaluated how microplastics affect the performance of microbial fuel cells used for wastewater treatment. They found that low concentrations of microplastics actually improved chemical oxygen demand reduction and power production compared to wastewater without microplastics. However, at higher concentrations the beneficial effects diminished, suggesting that microplastic levels in wastewater could influence the efficiency of bioelectrochemical treatment systems.
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.
Nitrogen removal performance of bioretention cells under polyethylene (PE) microplastic stress
Researchers investigated how polyethylene microplastics affect the nitrogen removal performance of bioretention cells used to filter stormwater runoff. The study found that microplastic accumulation reduced overall nitrogen removal efficiency by up to 28% while altering the microbial community structure responsible for denitrification.
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.
Investigation of the influence of polystyrene microplastics in wastewater on anode biofilm viability and electron transfer in microbial fuel cells performance
Researchers found that polystyrene microplastics in wastewater reduce the electricity-generating ability of microbial fuel cells — devices that use bacteria to turn waste into power — by disrupting the bacterial biofilms that transfer electrons to electrodes. Carbon-based electrodes were more resistant to microplastic interference than metal ones, suggesting material choice matters when designing systems treating microplastic-contaminated water.
Insight into effect of polyethylene microplastic on nitrogen removal in moving bed biofilm reactor: Focusing on microbial community and species interactions
Researchers studied how polyethylene microplastics affect nitrogen removal in wastewater treatment bioreactors and found that low concentrations slightly improved the process, while higher concentrations disrupted it. The microplastics changed the microbial communities responsible for breaking down nitrogen in wastewater. This matters because less effective wastewater treatment means more nitrogen pollution in waterways, and microplastics entering treatment plants could reduce their ability to clean water effectively.
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.
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.
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.
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.
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.
Long-term effect of polyethylene microplastics on the bioelectrochemical nitrogen removal process
Researchers explored how polyethylene microplastics affect nitrogen removal in bioelectrochemical wastewater treatment systems over long-term exposure. The study found that microplastic exposure reduced nitrogen removal efficiency by decreasing biofilm viability, lowering extracellular polymeric substance content, and significantly shifting the microbial community structure responsible for nitrogen processing.
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.
Effects of microplastics accumulation on performance of membrane bioreactor for wastewater treatment
Researchers simulated the long-term accumulation of polypropylene microplastics in membrane bioreactors used for wastewater treatment. They found that while microplastic accumulation did not reduce the removal of key pollutants like COD and ammonia nitrogen, it did increase membrane fouling and alter the composition of microbial communities in the reactor. The study suggests that microplastic buildup in wastewater treatment systems may affect operational efficiency over time.
Effects of microplastics on atrazine removal in constructed wetlands: Insight into the response characteristics of microorganisms, enzyme activity, and functional genes
Researchers found that adding polyethylene microplastics to constructed wetlands (engineered systems that filter polluted water) reduced the wetlands' ability to remove the pesticide atrazine by disrupting the microbial communities responsible for breaking it down. The microplastics altered enzyme activity and shifted the balance of beneficial bacteria in the wetland system. This is important because constructed wetlands are used to clean agricultural runoff, and microplastic contamination could make them less effective at protecting water quality.
Insights into the impact of polyethylene microplastics on methane recovery from wastewater via bioelectrochemical anaerobic digestion
Researchers found that polyethylene microplastics inhibited methane recovery in bioelectrochemical anaerobic digestion systems by disrupting microbial communities and electrochemical performance, though low concentrations had less severe effects.
Microplastics in granular sequencing batch reactors: Effects on pollutant removal dynamics and the microbial community
Researchers investigated how polyethylene and polyethylene terephthalate microplastics affect pollutant removal in granular sludge wastewater treatment reactors. They found that microplastic type and concentration influenced nitrogen, phosphorus, and organic compound removal rates, with PET particles showing a stronger tendency to accumulate within the biomass. The study indicates that microplastic contamination in wastewater treatment systems may compromise treatment efficiency and alter microbial community dynamics.
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.
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.
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.
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.
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.
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.