Enhancing microplastic removal from natural water using coagulant aids

Chemosphere, Journal Year: 2024, Volume and Issue: 364, P. 143145 - 143145

Published: Aug. 22, 2024

Microplastic (MP) pollution poses a significant environmental challenge, underscoring the need for improved water treatment methods. This study investigates effectiveness of coagulation, flocculation, and sedimentation processes removing microbeads, focusing on key factors that influence removal efficiency. Among coagulants tested, polyaluminium chloride (PAC) demonstrated superior performance by enhancing aggregation microplastics with flocs. Optimal conditions were determined to be 0.4 mmol/L PAC 3 mg/L polyacrylamide (PAM) at pH 8 (before adding PAC), rapid stirring 240 rpm 1 min, followed slow 35 13 period 25 min. Under these conditions, efficiencies exceeded 95 % range microbeads (10-1000 μm: Polystyrene (PS), Polypropylene (PP), Polyvinyl (PVC), Polyamide (PA), Polyethylene (PE), Polyurethane (PU)) from natural samples. Without PAM, alone achieved 97 rate PS microbeads. The addition PAM maintained high efficiency, while aluminium sulphate ferric less effective, rates 67 48 respectively. enhanced MP across various microbead types, maximum efficiency observed concentrations ≥3 mg/L. also organic matter in Regent's Park pond could further improve removal. Size significantly impacts efficiency: larger (1 mm >250 μm) removed more effectively (95 %) compared smaller ones (10 <250 μm), which had lower 49 %. Denser like PVC (density 1.38 g/cm³) settled efficiently than lighter such as PE 0.97 g/cm³). These findings suggest advanced technologies better remove lighter, MPs water.

Language: Английский

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Microplastic in seafood from the Persian Gulf: occurrence, characteristics, risk assessment, and human exposure

Journal of Food Composition and Analysis, Journal Year: 2025, Volume and Issue: unknown, P. 107561 - 107561

Published: March 1, 2025

Language: Английский

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Microplastics in Indian Freshwater Systems: Multidisciplinary Analysis of Sources, Consequences, and Mitigation Strategies

Physics and Chemistry of the Earth Parts A/B/C, Journal Year: 2025, Volume and Issue: unknown, P. 103942 - 103942

Published: April 1, 2025

Language: Английский

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Are microplastics a new cardiac threat? A pilot study with wild fish from the North East Atlantic Ocean

Environmental Research, Journal Year: 2024, Volume and Issue: 261, P. 119694 - 119694

Published: July 27, 2024

Global environmental contamination by microplastics (MPs) is a growing problem with potential One Health impacts. The presence of MPs in vital organs, such as the heart, particular concern, but knowledge still limited. goal present pilot study was to investigate heart wild specimens three commercial fish species (Merluccius merluccius, Sardina pilchardus, and Trisopterus luscus) from North East Atlantic Ocean. Heart samples 154 were analysed for MP content (one sample per fish). A total 44 recovered species. had varied chemical composition (5 polymers), shapes (4) colours (5). Differences profile among observed (p ≤ 0.05). Thirty (19%) their hearts, mean (±SD) concentration 0.286 ± 0.644 MPs/fish. S. pilchardus highest There no significant > 0.05) differences between M. merluccius T. luscus. These findings different biological ecological traits together literature data suggest that likely disseminated phenomenon. Therefore, further research on cardiovascular system its health effects very much needed.

Language: Английский

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Microplastic footprints in sharks and rays: First assessment of microplastic pollution in two cartilaginous fishes, hardnose shark and whitespotted whipray

Marine Pollution Bulletin, Journal Year: 2024, Volume and Issue: 212, P. 117350 - 117350

Published: Dec. 27, 2024

Language: Английский

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