Author(s): M. Athulya Krishnan; Deepa Oommen; R. Fathimy; S. Gouri Nandana; Jitha Das; Dr Priya K. L; M. S. Dr Indu
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Keywords: Microplastics; Chemical coagulation; Freshwater; Coagulant dosage; Rotating speed
Abstract: The presence of microplastics in freshwater can harm biodiversity, affecting the balance of aquatic ecosystems and human health. Conventional freshwater treatment systems can reduce some levels of microplastics, they are not fully efficient in eliminating them, especially the smaller particles. Advanced solutions and improved technologies are necessary for better mitigation. This study explores the potential of chemical coagulation together with a bioflocculant synthesized from Psidium Guajava leaves for removing polystyrene microplastics. Various parameters such as polystyrene concentration, coagulant dosage, pH, rotating speed were optimized to enhance microplastics removal. This study identified that using of alum as a chemical coagulant at a concentration around 0.05g/L, pH (5-9), and rotating speed of 250-300rpm followed by slow mixing, along with that addition of bioflocculant Psidium guajava leaves improved the removal efficiency highlighting its potential for reducing microplastic pollution in fresh water.
Year: 2024