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Evaluación de la capacidad de remoción de microplásticos en agua cruda mediante procesos convencionales de tratamiento
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Researchers tested aluminum polychloride (PAC) and ferric chloride (FeCl₃) coagulants for removing micro- and nanoplastics from drinking water sources in Colombia's Oriente Antioqueño region, finding PAC at 10 mg/L achieved up to 83% removal efficiency, while weathered microplastics showed different removal patterns than pristine particles, highlighting the need to tailor treatment processes to particle characteristics.
El acelerado crecimiento urbano en el Oriente antioqueño, especialmente en la cuenca del río Negro, ha incrementado la presencia de micro y nanoplásticos (MP y NP) en las fuentes hídricas, convirtiéndolos en contaminantes emergentes debido a su persistencia y potencial impacto en la salud. Las plantas de tratamiento de agua potable (PTAP) actuales no están diseñadas para remover eficientemente estos contaminantes, y su regulación normativa aún es inexistente. Este estudio evalúa la eficiencia de los coagulantes policloruro de aluminio (PAC) y cloruro férrico (FeCl3) en la remoción de MP y NP durante procesos convencionales de potabilización. Se identificó que la concentración del coagulante influye significativamente en la eficiencia de remoción, con una óptima de 10 mg/L para PAC logrando hasta un 83% de eliminación. La MANOVA evidenció que color, turbiedad y concentración de MP son variables críticas. Los mejores resultados se obtuvieron con MP prístinos y PAC, mientras que los MP meteorizados mostraron mayor remoción en tamaños de 500, 250 y 75 µm con FeCl3. En cambio, los MP de 53 µm se removieron mejor cuando eran prístinos y tratados con FeCl3. Estos hallazgos evidencian la necesidad de ajustar los procesos de potabilización según el tipo y tamaño del MP, y destacan el impacto de la meteorización en la eficiencia de remoción.
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Researchers evaluated dissolved air flotation (DAF) combined with coagulation and flocculation for removing four types of microplastics (HDPE, PE, PET, PS) at bench scale, finding removal efficiencies ranging from 66–91% depending on polymer type; PET achieved the highest removal (91.3%) with aluminum sulfate coagulation alone, while PS was the most difficult to remove due to its hydrophobicity.
Understanding and Improving Microplastic Removal during Water Treatment: Impact of Coagulation and Flocculation
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Researchers systematically tested coagulation and flocculation for removing microplastics from drinking water, finding that removal efficiency depended strongly on plastic particle size and whether particles had been weathered, with smaller pristine particles being the hardest to remove.
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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.
Microplastic removal in coagulation-flocculation: Optimization through chemometric and morphological insights
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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.
Investigating the Potential of Coagulants to Improve Microplastics Removal in Wastewater and Tap Water
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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.
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When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.