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20 resultsShowing papers similar to Removal behaviors and mechanism of polystyrene microplastics by coagulation/ultrafiltration process: Co-effects of humic acid
ClearImproving nanoplastic removal by coagulation: Impact mechanism of particle size and water chemical conditions
Researchers found that coagulation using aluminum chlorohydrate and polyacrylamide achieved up to 98.5% removal efficiency for polystyrene nanoplastics, with smaller particles being easier to remove, though humic acid in water competed for adsorption sites and reduced effectiveness.
Removal characteristics of microplastics by Fe-based coagulants during drinking water treatment
The removal of polyethylene microplastics from drinking water was tested with Fe-based coagulants under various conditions, finding that traditional coagulation alone achieved below 15% removal, while coagulation combined with ultrafiltration substantially improved performance. The study identifies the limitations of conventional water treatment for microplastic removal and highlights ultrafiltration as a necessary add-on for effective particle reduction.
Enhanced Removal of Polystyrene Microplastics from Water Through Coagulation Using Polyaluminum Ferric Chloride with Coagulant Aids
Researchers tested enhanced coagulation using modified coagulants to remove polystyrene microplastics from water, finding that surface-modified coagulants achieved significantly higher removal efficiencies than conventional alum. Removal reached over 90% under optimized conditions, demonstrating a practical upgrade pathway for conventional water treatment plants to reduce microplastic discharge.
Microcosmic mechanism analysis of the combined pollution of aged polystyrene with humic acid and its efficient removal by a composite coagulant
Researchers analyzed how aged polystyrene interacts with humic acid at the molecular level and developed a novel polyaluminum-titanium chloride composite coagulant that effectively removes these combined pollutants from water across different pH conditions.
Microplastics removal from natural surface water by coagulation process
Researchers compared the effectiveness of ferrous and aluminum sulfate coagulants for removing microplastics from natural surface water, finding that both successfully removed polystyrene and polyvinyl chloride particles. Ferrous sulfate showed slightly higher removal efficiency, and the addition of coagulant aids further improved results. The study demonstrates that conventional coagulation processes already used in drinking water treatment can meaningfully reduce microplastic contamination.
Coagulation performance and mechanism of different hydrolyzed aluminum species for the removal of composite pollutants of polyethylene and humic acid
Researchers examined how different forms of hydrolyzed aluminum coagulants remove polyethylene microplastics and humic acid from water. The study found that when humic acid adsorbs onto microplastic surfaces, it changes the removal dynamics, and polyaluminum chloride with hexagonal clusters achieved the best microplastic removal through adsorption bridging and sweeping mechanisms.
Surface characteristics of polystyrene microplastics mainly determine their coagulation performances
Researchers evaluated polyaluminum sulfate coagulant for removing polystyrene microplastics from water, achieving 90.4% removal at optimal dosage. Surface characteristics of microplastics including density, particle size, and adsorbed substances significantly influenced coagulation efficiency.
Coagulation/Flocculation-Ultrafiltration Optimization in Drinking Water Treatment
This study optimized coagulation and flocculation conditions prior to ultrafiltration in drinking water treatment to better remove organic matter and reduce membrane fouling. Improved drinking water treatment also enhances the removal of microplastics that would otherwise pass through to treated tap water.
Evaluating the performance of electrocoagulation system in the removal of polystyrene microplastics from water
Researchers tested electrocoagulation, a water treatment method that uses electric current to clump particles together, for removing polystyrene microplastics from water. Using aluminum electrodes at neutral pH, they achieved over 90% removal efficiency. This technology could provide a practical and effective way to remove microplastics from drinking water and wastewater, reducing human exposure to these contaminants.
Membrane fouling characteristics and mechanisms in coagulation-ultrafiltration process for treating microplastic-containing water
This study investigated how microplastics affect membrane fouling during a common water treatment process that combines coagulation with ultrafiltration. Researchers found that while microplastics initially worsen membrane fouling, adding the right amount of coagulant can actually turn the plastics into an advantage by creating a looser filter cake that improves water flow.
Chemical Coagulation Applied for the Removal of Polyethylene and Expanded Polystyrene Microplastics
Researchers evaluated the use of aluminum sulfate-based coagulation and flocculation processes for removing polyethylene and expanded polystyrene microplastics from water. The study used factorial experimental designs to optimize treatment conditions including coagulant dosage and pH, demonstrating the potential of chemical coagulation as a microplastic removal strategy.
Investigating the Potential of Coagulants to Improve Microplastics Removal in Wastewater and Tap Water
Researchers found that adding coagulants (FeCl3 or Al2(SO4)3) to wastewater and tap water improved microplastic removal, with aluminum sulfate achieving 43% and 62% removal efficiencies respectively, though the high concentrations required suggest that combining coagulants with organic polyelectrolytes could improve practicality.
Removal of polystyrene and polyethylene microplastics using PAC and FeCl3 coagulation: Performance and mechanism
Researchers studied how two common water treatment coagulants, PAC and iron chloride, remove polystyrene and polyethylene microplastics from water. They found that PAC was more effective than iron chloride, and that alkaline conditions improved removal rates. The study provides practical insights for drinking water treatment plants looking to reduce microplastic contamination in their supply.
Removal of Microplastics from Wastewater Treatment Plants by Coagulation
Researchers tested coagulation-based methods for removing microplastics from wastewater using polyaluminum chloride and polyferric sulfate, with and without polyacrylamide additives. The best results came from combining polyaluminum chloride with cationic polyacrylamide, which achieved 87.5% removal of polystyrene microplastics. The study suggests that cationic polyacrylamide works especially well because of electrostatic interactions with negatively charged microplastic particles.
New insights into the fate and interaction mechanisms of hydrolyzed aluminum-titanium species in the removal of aged polystyrene
Researchers investigated the interaction between polyaluminum-titanium chloride composite coagulant species and aged polystyrene microplastics, revealing how species transformation during coagulation affects the removal efficiency of microplastics from water.
The suitability and mechanism of polyaluminum-titanium chloride composite coagulant (PATC) for polystyrene microplastic removal: Structural characterization and theoretical calculation
Researchers developed a new coagulant (a chemical that clumps particles together for removal) that effectively removes polystyrene microplastics from water. The composite coagulant worked better than standard water treatment chemicals across a wider range of water conditions, using hydrogen bonding to capture the plastic particles. This technology could improve drinking water treatment plants' ability to filter out microplastics before water reaches consumers.
Fate and removal efficiency of polystyrene nanoplastics in a pilot drinking water treatment plant
Researchers investigated how effectively a pilot-scale drinking water treatment plant removes polystyrene nanoplastics. The study found that sand and activated carbon filtration alone achieved 88.1% removal, but adding a coagulation step dramatically improved removal efficiency to 99.4%, with most nanoplastics captured during the sand filtration process.
Enhancing microplastic removal from natural water using coagulant aids
Researchers tested different chemical treatments for removing microplastic beads from natural water and found that polyaluminium chloride combined with polyacrylamide achieved over 95% removal across six common plastic types. The treatment worked on particles ranging from 10 to 1,000 micrometers, and natural organic matter in the water actually improved performance. The findings suggest that optimizing standard water treatment processes could be a practical way to reduce microplastic contamination in drinking water sources.
Occurrence and removal of microplastics by advanced and conventional drinking water treatment facilities
Researchers assessed microplastic occurrence and removal efficiency at drinking water treatment plants using both conventional and advanced treatment processes. Advanced treatment steps such as ultrafiltration and activated carbon significantly improved microplastic removal compared to conventional coagulation and filtration alone.
Occurrence and removal of microplastics by advanced and conventional drinking water treatment facilities
Researchers evaluated the performance of both advanced and conventional drinking water treatment processes for removing microplastics, finding that advanced methods such as ultrafiltration substantially outperform standard coagulation and filtration. Most conventional treatment plants leave a meaningful fraction of microplastics in finished drinking water.