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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.
The widespread presence of microplastics (MPs) in water has become an environmental concern due to their adverse effects on human health and aquatic ecosystems. To address this issue, metal–organic framework/graphene oxide composites have recently emerged as a promising solution for wastewater treatment due to their unique properties such as high loading capacity and enhanced stability. In this research, the uptake mechanisms of two types of MPs, including Polyamide 66 (PA66) and Polyurethane (PU) based on the metal–organic framework Cu-BTC/graphene oxide (Cu-BTC/GO) composite, are evaluated by molecular dynamics (MD) simulation. By increasing the number of adsorption sites through the incorporation of GO onto Cu-BTC, the designed composite demonstrates higher efficiency in removing MPs compared to the pristine MOF. The removal percentage of PA66 and PU increases from 25% and 0.75% in the MP-single Cu-BTC systems to 100% upon adsorption in the Cu-BTC/GO composite, respectively. The adsorption capacity of Cu-BTC/GO composite for MPs is enhanced through π–π stacking, C–H⋯ π interactions, hydrogen-bonding network, and electrostatic attractions, with a predominant hydrophobic nature. Furthermore, the results of density functional theory (DFT) calculations confirm the findings from the MD study. This research provides detailed atomistic insights into the mechanisms of microplastics removal by the metal–organic framework composite with graphene oxide from wastewater.
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Computer simulations tested how graphene oxide, a material being explored for cleaning polluted water, binds to nearly 2000 pollutants including pharmaceuticals, PFAS chemicals, and microplastic-related compounds. The modeling found that oily, ring-shaped pollutants stuck most strongly to the material's surface, while charged compounds bound more weakly, and a modified version of graphene oxide showed even stronger binding.
Metal-Organic Frameworks as robust adsorbents for Microplastic Removal – A review of Synthesis Strategies, Mechanistic insights and Computational studies
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Millions of tons of plastic waste end up in our oceans and water supply every year, breaking down into tiny microplastic particles that can carry toxic chemicals into our bodies and disrupt biological processes. This review paper rounds up recent research on a promising cleanup tool called Metal-Organic Frameworks (MOFs) — sponge-like materials with tiny pores that act like magnets, trapping and removing over 97% of microplastics from water in lab tests, even after being reused multiple times. While these materials aren't yet in widespread use, they represent a hopeful next step toward cleaner water and reduced microplastic
Microplastics removal from aqueous environment by metal organic frameworks
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This review examines how metal-organic frameworks (MOFs), a class of advanced porous materials, can remove 70-99.9% of microplastics from water in laboratory settings. MOFs can be customized with specific pore sizes and chemical properties to target different types of microplastics. While challenges remain with cost and scaling up, this technology shows promise for developing more effective water treatment systems to reduce human exposure to microplastics in drinking water.
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The role and significance of graphene oxide in the remediation of micro- and nanoplastics from the environment
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This review examines how graphene oxide, a carbon-based material with a very large surface area, can be used to remove microplastics and nanoplastics from water. Graphene oxide showed impressive removal capacity for polystyrene microplastics through adsorption. The technology could be an important tool for developing more effective water treatment systems that protect people from microplastic contamination.
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