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61,005 resultsShowing papers similar to Removal of microplastics from secondary wastewater treatment plant effluent by coagulation/flocculation with iron, aluminum and polyamine-based chemicals
ClearThe influence of coagulation process conditions on theefficiency of microplastic removal in water treatment
Researchers investigated how coagulation process conditions — including coagulant type, pH, and microsand addition — affect the removal of polyethylene, PVC, and textile microfibers from river water, municipal wastewater, laundry effluent, and synthetic matrices. Ferric chloride and polyaluminum chloride both achieved substantial removal, with performance varying significantly by water matrix and microplastic type.
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.
Electro-coagulation technique using iron [Fe] and aluminium [Al] for microplastics removal from fashion industry wastewater, Thailand
Laboratory tests showed that electrocoagulation — running electrical current through iron and aluminum electrodes — can remove microplastics from textile industry wastewater in Thailand with high efficiency. Because conventional wastewater treatment plants were not designed to capture particles as small as microplastics, electrochemical methods like this represent a promising upgrade to reduce the millions of microplastic particles released daily from textile factories.
Coagulation and Flocculation before Primary Clarification as Efficient Solutions for Low-Density Microplastic Removal from Wastewater
Researchers tested coagulation and flocculation treatments before primary clarification in a wastewater treatment plant, finding up to 90% removal efficiency for low-density microplastics using PAX coagulant, with different reagents directing microplastics to either settled or floated sludge fractions.
Influence of Different Coagulants on Microplastics Removal
Researchers compared the effectiveness of different coagulants—including aluminum sulfate, ferric chloride, and polyaluminum chloride—for removing microplastics from water, finding significant performance differences dependent on plastic particle size, charge, and coagulant dose.
Removal of most frequent microplastic types and sizes in secondary effluent using Al2(SO4)3: choosing variables by a fuzzy Delphi method
This study found that aluminum sulfate coagulation removed 72-99% of common microplastic types from secondary wastewater effluent, with removal efficiency varying by polymer type and particle size. Polyamide and polystyrene particles were removed most effectively, while polyethylene was more resistant, demonstrating that optimized coagulation can significantly reduce microplastic discharge from wastewater treatment plants.
Removal of microplastics from wastewater through electrocoagulation-electroflotation and membrane filtration processes
Researchers investigated electrocoagulation-electroflotation and membrane filtration for removing microplastics from wastewater, finding that combining these processes effectively recovers microplastic particles from treatment plant effluent.
Efficiency and mechanism of micro- and nano-plastic removal with polymeric Al-Fe bimetallic coagulants: Role of Fe addition
Researchers investigated polymeric Al-Fe bimetallic coagulants for removing micro- and nanoplastics from drinking water, finding that iron addition enhanced nanoplastic removal efficiency through improved charge neutralization and floc formation mechanisms.
Research on Effect of Microplastics Removal through Combination of Coagulation and Sand Filtration
Researchers tested three coagulants — ferric chloride (FeCl3), polyferric sulfate (PFS), and polyaluminum chloride (PAC) — for microplastic removal from secondary wastewater effluent, finding that 40 mg/L PFS achieved the highest coagulation removal rate of 61%. A combined PFS plus sand filtration process removed 91% of microplastics, 82% of suspended solids, and 85% of total phosphorus at a treatment cost of approximately 0.0594 Yuan per tonne of wastewater.
Coagulation technologies for separation of microplastics in water: current status
This review examines how coagulation water treatment technologies can remove microplastics from water. Conventional coagulation achieves 8-98% removal efficiency while electrocoagulation achieves 8-99%, depending on conditions, offering a potentially effective approach for reducing microplastics in drinking water and wastewater.
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.
A comprehensive review of microplastics in wastewater treatment plants
This review surveys microplastic removal technologies used in wastewater treatment plants, comparing membrane bioreactors, electrocoagulation, coagulation-sedimentation, and biodegradation approaches. Understanding removal efficiency at treatment plants is critical because they are a primary pathway by which microplastics — and the toxic chemicals they carry — reach rivers, coastal waters, and ultimately drinking water supplies.
The removal of microplastics from water by coagulation: A comprehensive review
This review comprehensively examined coagulation as a technology for removing microplastics from drinking water and wastewater treatment plants, analyzing the mechanisms, influencing factors, and effectiveness of different coagulants for microplastic removal.
Treatment technologies for the removal of micro plastics from aqueous medium
Researchers reviewed treatment technologies for removing microplastics from water, finding that while multiple methods including filtration, membrane processes, and coagulation show promise, their effectiveness depends on microplastic size, type, and concentration.
Chemical methods to remove microplastics from wastewater: A review
This review examines three chemical approaches for removing microplastics from wastewater: coagulation (clumping particles together), electrocoagulation (using electrical current), and advanced oxidation (breaking plastics down chemically). Each method has strengths and weaknesses in terms of cost, effectiveness, and potential byproducts. The research is important because wastewater treatment plants are a major pathway through which microplastics reach rivers, lakes, and ultimately human drinking water sources.
Removal of Microplastics from Wastewater by Methods of Electrocoagulation and Adsorption
This review examines electrocoagulation and adsorption methods for removing microplastics from wastewater, comparing them against conventional physical, chemical, and biological approaches in terms of removal efficiency, cost, and practical scalability.
Size and Shape Distribution of Microplastics in PET Recycled Wastewater and Their Removal Behavior during the Coagulation–Flocculation Process
Researchers investigated the size and shape distribution of microplastics in wastewater from a PET recycling facility and evaluated removal efficiency through coagulation-flocculation, finding that fragment-shaped and medium-sized particles were most abundant and most effectively removed. The study demonstrates that coagulation-flocculation is a strong candidate for controlling microplastic release from plastic recycling facilities.
Microplastic removal in coagulation-flocculation: Optimization through chemometric and morphological insights
Researchers optimized the coagulation-flocculation process — a standard water treatment step where chemicals cause particles to clump and settle — for removing three types of microplastics: polypropylene, polyethylene, and polystyrene. Polystyrene was removed most efficiently, and adjusting pH, coagulant type, and dosage significantly improved removal rates, providing practical guidance for upgrading existing water treatment plants to better capture microplastics.
Coagulation of Wastewater Containing Polyethylene Terephthalate (PET) Microplastics by Using Ferric Chloride, Aluminum Sulfate and Aluminum Chlorohydrate: A Comparative Study
Researchers compared ferric chloride, aluminum sulfate, and aluminum chlorohydrate coagulants for removing PET microplastics from plastic recycling facility wastewater, finding that aluminum sulfate at pH 6 achieved the highest removal rate of 90% for predominantly fragment-shaped MPs in the 251-500 micrometers size range.
Influence of wastewater treatment process on pollution characteristics and fate of microplastics
Researchers investigated microplastic abundance and removal efficiency across four wastewater treatment plants using different treatment technologies, finding influent concentrations between 539 and 1,290 particles per liter that were reduced substantially by primary and secondary treatment. Smaller microplastic particles proved hardest to remove and most likely to persist in final effluent.
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.
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.
Improving 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.