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Study of Polyurethane Microplastics Removal from Water Using Smart Installation
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Scientists tested a new water treatment system designed to filter out tiny plastic particles (microplastics) from polyurethane, a common plastic found in foams and coatings. By combining chemical treatments with a specially designed settling and filtering process, they were able to remove over 99% of these particles from water. This matters because microplastics are increasingly found in drinking water and their health effects are still being studied, so better removal methods could help reduce our exposure before science fully sorts out the risks.
Microplastics, MPs, plastic particles with dimensions between 0.1 and 5 mm, represent an important environmental pollutant. The removal of microplastics from natural and wastewater is a challenging research topic. In this regard, high-performance technical solutions must be identified, which can be based on existing treatment and purification technologies, to ensure their removal at concentration values in accordance with the legislation in force. In this study, the efficiency of removing some fractions of polyurethane microplastics, with dimensions smaller than 500 µm, from aqueous synthetic solutions with a concentration of 0.2 g L−1, i.e., around 175 NTU, was evaluated. In the first stage of the study, the doses of coagulants and flocculants effective for the removal of microplastics were identified through the Jar Test. The variation in turbidity and their removal efficiencies were evaluated in the presence of classic coagulants, such as aluminum sulfate, Al2(SO4)3·18H2O, SA; iron sulfate (ferrous sulfate), FeSO4, IS; polyaluminum chloride, [Al2(OH)nCl6−n], PAC; Aloe Vera, AV, a flocculant; and activated carbon, AC, of the Norit GAC 830 W type. Classic coagulants, such as aluminum sulfate, have a good efficiency in removing microplastics, being able to provide a residual turbidity in the range of 6–10 NTU after a retention time of 50–60 min. In the second stage of the study, the removal efficiency of microplastics was tested using a laboratory pilot plant—called in the study the Smart Decantation-Filtration System, SDFS. The efficiency of the decanter was studied using Response Surface Methodology (RSM) to identify mathematical models that characterize the influence of key process variables: flow rate (A), microplastic size (B) and aluminum sulfate concentration (C) on microplastic removal efficiency. Sedimentation in the specially constructed decanter can raise the optimal value of the removal efficiency of polyurethane microplastics to 98.98%, and filtration can ensure an efficiency that reaches over 99.5%. Through this research, we aimed to identify viable solutions that can be applied to remove microplastics, MPs, from natural and wastewater. A novel element is the fact that we chose to study the removal of polyurethane, which is studied little in the literature. We identified the optimal doses of coagulants and flocculants that help sedimentation of MPs. The efficiency of an installation called Smart Decantation-Filtration System, specially designed to ensure increased efficiency in the removal of microplastics, was determined. The results obtained were encouraging.
More Papers Like This
Study of Polyurethane Microplastics Removal from Water Using Smart Instalation
AI summary Read the abstract
Researchers tested coagulation-sedimentation methods and a smart decantation-filtration system for removing polyurethane microplastics from water, finding that optimized aluminum sulfate dosing paired with Response Surface Methodology-guided sedimentation achieved up to 98.98% removal efficiency for particles in the 100–500 µm range.
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Scientists found a way to remove tiny plastic particles (microplastics) from tap water more effectively by adding a soap-like ingredient called a surfactant to the standard water treatment process. This tweak boosted plastic removal to over 95%, which matters because microplastics have been showing up in our drinking water and bodies, and better filtering methods could help reduce our exposure to them before they even reach the tap.
Microplastics Removal by Sustainable PVA/Bentonite Membranes: Morphological and Structural Evidence of the Retention Mechanism
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Scientists created a new water filter made from a biodegradable plastic material (PVA) mixed with a natural clay (bentonite) that removed nearly 100% of microplastics from water in lab tests. This matters because microplastics—tiny plastic particles now found in our water, food, and even our bodies—are a growing health concern, and this eco-friendly filter could offer a cheaper, more sustainable way to clean drinking water compared to current methods. While the results are promising, this was tested under controlled lab conditions, so more research is needed before it's used in real-world water treatment systems.
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Scientists developed a new water-filtering material that can remove up to 97% of microplastics, along with toxic dyes and heavy metals like lead and mercury, from contaminated water. This matters because current water treatment methods often struggle to catch these tiny plastic particles and pollutants, which can build up in our bodies over time; this new filter could offer a cheaper, more effective way to clean drinking water and protect public health.
Molecular Mechanisms Governing the Adsorption, Deposition, and Removal of Environmentally Aged Microplastics by Engineered Surfaces
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Scientists figured out how tiny plastic particles that have been weathered in the environment stick to different surfaces, then used this knowledge to create a new material that can remove over 92% of these microplastics from water. This breakthrough could lead to better filters and cleanup systems to remove microplastics from drinking water and the environment. Since microplastics are found everywhere from our food to our bloodstream, having effective ways to remove them could help protect human health.
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