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Fabrication and performance analysis of graphene oxide-based composite membrane to separate microplastics from synthetic wastewater
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This study fabricated a graphene oxide/polyvinyl alcohol composite membrane on a cellulose support for removing high-density polyethylene microplastics from water. FTIR confirmed acetalization bonding between GO and PVA, and performance testing demonstrated effective microplastic separation from synthetic wastewater.
Abstract The pervasiveness of microplastics (MPs) are jeopardizing the entire environment and need to be eradicated immediately. With such an aim, this study is highlighting the fabrication of graphene oxide (GO) - polyvinyl alcohol (PVA) based composite membrane to separate high-density polyethylene (HDPE)-based MPs from water. Here, the GO layers were stabled through the bonding with PVA by using glutaraldehyde followed by the deposition on cellulose membrane via vacuum filtration. The bonding between GO and PVA via acetalization was confirmed by FTIR while surface morphology of composite membrane was analyzed by SEM. However, during experimentation, further analysis with contact angle and zeta potential measurements were carried out to confirm the hydrophilicity and negative surface charge of membrane respectively. To control membrane thickness, optimum volume of GO-PVA composite solution was used to achieve high water flux as well as high rejection of MPs. Regarding the evaluation of membrane performance, dead-end filtration system was considered. Particularly, at pH 8, with 3.5 bar of transmembrane pressure, and 15s time duration 95% HDPE rejection was noticed while the highest permeability of fabricated membrane was 179 L m− 2 h− 1 bar − 1. The mechanisms for MP removal were electrostatic repulsion between membrane surface and MPs along with sieving capacity. So, these finding are highlighting the promising approaches of GO-based composite membrane to separate HDPE-based MPs from wastewater.
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Scientists created a new filter membrane using graphene oxide and a common plastic-safe polymer, designed to trap microplastics from water. In tests, it removed over 90% of one common plastic type (HDPE, found in bottles and containers) and up to 78% of another (polystyrene, used in packaging and foam), and it could be reused multiple times while still working fairly well. This matters because microplastics are increasingly found in our drinking water and bodies, and better filtration technology like this could eventually help reduce our exposure to these pollutants — though the filter still needs improvement before it's ready for widespread use.
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Researchers developed a polyvinyl alcohol-graphene oxide membrane combined with IoT-based real-time monitoring to improve microplastic removal from wastewater treatment plants. Conventional treatment plants in the study achieved only about 84% microplastic removal, leaving significant amounts entering natural water bodies. The membrane filtration system coupled with continuous monitoring showed promise for improving microplastic capture rates in wastewater treatment.
PVA-GO Membrane for the Treatment of Microplastics in Wastewater
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Researchers developed a polyvinyl alcohol-graphene oxide composite membrane for microplastic removal in wastewater treatment, investigating how this membrane-based approach addresses the limitations of conventional systems in capturing the small plastic particles that pass through standard treatment processes.
In silico design and simulation of graphene oxide-based metal–organic framework nanomaterial for water purification
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Using computer simulations, researchers designed a composite nanomaterial made of graphene oxide and a metal-organic framework to filter microplastics from water. The study found that the composite was effective at adsorbing two common microplastic types, polyamide and polyurethane, with graphene oxide increasing the number of binding sites. The simulations suggest this material could be a promising candidate for practical microplastic removal from wastewater.
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Researchers found that graphene oxide, a carbon-based material, can effectively bind and remove harmful microplastic contaminants like BPA and PET from water through strong molecular interactions. This technology could be developed into filtration systems for large-scale water treatment, helping reduce the amount of microplastic-related chemicals that people are exposed to through drinking water.
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