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61,005 resultsShowing papers similar to Application of Floating Beds Constructed with Woodchips for Nitrate Removal and Plant Growth in Wetlands
ClearEffects 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.
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.
Retention of microplastics by interspersed lagoons in both natural and constructed wetlands
Researchers used laboratory wetland models to test how well constructed wetlands with interspersed lagoons and aquatic vegetation can capture microplastic particles from water. Combining vegetated patches with a lagoon achieved microplastic retention rates of up to 99%, suggesting that nature-based wetland designs could be an effective low-cost strategy for filtering microplastics out of wastewater and rivers before they reach the ocean.
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.
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.
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.
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.
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.
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.
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.
Understanding microplastic retention in surface flow constructed wetlands: The impact of aquatic macrophytes
This study tested how well constructed wetlands with different aquatic plants retain three common types of microplastics: polyethylene beads, tire wear particles, and synthetic fibers. Plants with complex leaf structures trapped more microplastics than simpler plants or unvegetated areas. The findings suggest that planted wetlands could serve as a nature-based solution for filtering microplastics from water before they reach rivers and drinking water sources.
Wastewater Treatment by Constructed Wetland Eco-Technology: Influence of Mineral and Plastic Materials as Filter Media and Tropical Ornamental Plants
Constructed wetlands using ornamental plants effectively removed chemical pollutants from wastewater, and the presence of plastic residues in the growing medium affected treatment performance. This finding is relevant to understanding how microplastics in constructed wetlands may interfere with natural water purification processes.
Abundance, characteristics, and removal of microplastics in the Cihu Lake-wetland microcosm system
This study evaluated how well a multi-stage constructed wetland system could remove microplastics from wastewater treatment plant effluent, finding a total removal rate of 94.7%. Horizontal subsurface flow wetlands were particularly effective, and physical filtration through the wetland substrate was identified as the dominant removal mechanism. The findings suggest that constructed wetlands are a promising nature-based solution for reducing microplastic discharge into aquatic environments.
Sewage Derived Microplastic and Anthropogenic Fibre Retention by Integrated Constructed Wetlands
Researchers assessed microplastic and anthropogenic fibre retention efficiency of two integrated constructed wetlands in Norfolk, UK, collecting monthly water samples at inlets and outlets over 12 months to evaluate whether these low-cost treatment systems can effectively reduce MP loads discharged from small wastewater treatment plants.
Transport and fate of microplastics in constructed wetlands: A microcosm study
This study tested microplastic removal in constructed wetlands using different particle shapes and sizes, finding 81.6% removal in surface flow systems and 100% removal in horizontal subsurface flow systems, with biofilm attachment and physical filtration as key retention mechanisms.
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.
Removal of Plastics from Micron Size to Nanoscale Using Wood Filter
This study demonstrated that porous wood filters can effectively remove both microplastics and nanoplastics from water, offering a low-cost, biodegradable alternative to conventional filtration materials.
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 in a Large Constructed Wetland: Retention, Transport, and Characteristics
This study examined microplastic dynamics in a large constructed wetland, finding that the wetland acts as a net sink for microplastics with retention varying by particle size and shape, and identifying flow velocity as a key driver of transport behavior.
Small-Scale Model Experiments on Plastic Fragment Removal from Water Flows Using Multiple Filters in a Floating Body
Researchers designed small-scale floating filter devices to remove plastic fragments from water flow, testing multiple filter configurations in laboratory experiments. Physical filtration of plastic particles from water offers a practical approach to preventing microplastic accumulation in aquatic environments.
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.
Microplastic shape influences fate in vegetated wetlands
Researchers used a flume experiment to measure microplastic trapping efficiency in simulated coastal wetlands with two vegetation types — branched and grassy — testing microplastics varying in shape, size, and polymer type. They found that microplastic shape, rather than polymer type or the presence of vegetation, was the primary determinant of whether particles were retained in sediment or adhered to the vegetation canopy, advancing understanding of coastal wetlands as microplastic sinks.
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.
Biofilm growth is insufficient to retain large buoyant microplastics in constructed wetlands
Researchers investigated whether biofilm growth on buoyant microplastics is sufficient to cause them to sink and be retained in constructed wetlands used for water treatment. The study found that biofilm formation alone was insufficient to retain large buoyant microplastic particles, meaning these plastics may bypass constructed wetlands and enter downstream aquatic environments.