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61,005 resultsShowing papers similar to Synthesis and Evaluation of Alum Crystals from Waste Aluminum Foils in Turbid Water Treatment
ClearMicroplastics and nanoplastics in water: Improving removal in wastewater treatment plants with alternative coagulants
Laboratory tests showed that conventional aluminum sulfate (alum) coagulant becomes much less effective at removing micro- and nanoplastics from water at pH above 7.8—a common condition in municipal wastewater—but switching to aluminum chlorohydrate largely restores removal efficiency. This matters because wastewater treatment plants are a critical barrier preventing microplastics from entering rivers and oceans, and many currently use alum. The study gives water utilities a practical, drop-in solution to significantly improve microplastic capture under challenging water chemistry.
Microplastics removal from aquatic environment by coagulation: Selecting the best coagulant based on variables determined from a systematic review
This systematic review and experimental study identifies the most effective methods for removing microplastics from water using coagulation, a common water treatment technique. Researchers tested different coagulants on three types of microplastics and found that aluminum-based coagulants were most effective. These findings could help water treatment plants better remove microplastics from the water supply before it reaches our taps.
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.
Evaluation of Efficiently Removing Secondary Effluent Organic Matters (EfOM) by Al-Based Coagulant for Wastewater Recycling: A Case Study with an Industrial-Scale Food-Processing Wastewater Treatment Plant
Not relevant to microplastics — this study evaluates aluminium-based coagulants for removing organic matter from food-processing wastewater to enable safe water reuse.
Durable Superhydrophobic Coating for Efficient Microplastic Removal
Researchers developed a durable superhydrophobic (water-repelling) coating on aluminum that can efficiently capture and remove microplastic particles from water. The coating attracted microplastics at high removal rates and remained effective over multiple use cycles. This type of material could be incorporated into water treatment systems or filtration devices to reduce microplastic contamination in drinking water and wastewater.
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.
Uncovering the performance and intrinsic mechanism of different hydrolyzed AlTi species in polystyrene nanoplastics coagulation
Researchers systematically compared how different aluminum-titanium coagulant species remove nanoplastics from water, finding that polymeric AlTi species outperform monomeric ones by achieving 95% turbidity removal at lower doses through a combination of charge neutralization and chemical complexation with the nanoplastic surface.
Analysis of the Efficiency of the Electrocoagulation Process in the Removal of Microplastics
Researchers demonstrated that electrocoagulation using aluminum electrodes can remove up to 90% of microplastic glitter particles from water, with efficiency increasing as electrical conductivity and current intensity rise. This low-cost, chemical-free approach shows strong potential as a practical treatment step for removing microplastics from water without adding secondary contaminants.
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.
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.
Boehmite nanopowder recovered from aluminum cans waste as a potential adsorbent for the treatment of oilfield produced water
Researchers recovered high-surface-area boehmite particles from aluminum can waste and evaluated their ability to remove contaminants from oil industry wastewater. This work contributes to developing sustainable methods for water treatment using waste-derived materials, as cleaner water treatment reduces the chemical burden that often co-occurs with microplastic pollution.
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.
Performance of Chemical-Based vs Bio-BasedCoagulants in Treating Aquaculture Wastewaterand Cost-benefit Analysis
Researchers compared alum and neem-leaf coagulants for treating aquaculture wastewater in Malaysia, finding that alum achieved higher removal efficiencies for suspended solids and turbidity while the bio-based neem coagulant required lower dosages and offered cost advantages.
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.
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.
The 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.
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 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.
The study of the effectiveness of coagulants and white sludge in the process of dephosphotation of municipal wastewater
This technical study tested different coagulants for removing phosphorus from municipal wastewater, finding that aluminum-based coagulants were most effective. While focused on nutrient removal rather than microplastics, improved wastewater treatment is relevant to reducing overall water pollution.
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.
Leaching of Waste Pharmaceutical Blister Package Aluminium in Sulphuric Acid Media
Not relevant to microplastics — this study investigates hydrometallurgical methods for recycling aluminium from pharmaceutical blister packs using sulphuric acid, with no connection to plastic particle pollution.
Removal behaviors and mechanism of polystyrene microplastics by coagulation/ultrafiltration process: Co-effects of humic acid
Researchers investigated coagulation-ultrafiltration for removing polystyrene microplastics from drinking water, finding that aluminum-based coagulants achieved over 92% removal efficiency and that humic acid co-presence affected the removal mechanism and membrane fouling.
Parametric study of coagulant recovery from water treatment sludge towards water circular economy
Researchers investigated coagulant recovery from water treatment sludge at two treatment plants using sulfuric acid acidification at variable normalities, characterizing recovered coagulants by SEM and FTIR and testing their turbidity removal performance. The study aimed to establish optimal acidification conditions for a circular economy approach to coagulant reuse in surface water treatment.