Graphene Absorbent for PFAS remediation?
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Graphene-based absorbents show promise for per- and polyfluoroalkyl substances (PFAS) remediation. Various studies highlight the effectiveness of graphene materials in adsorbing PFAS from water. For instance, graphene monoliths have been developed as passive samplers for PFAS detection in aquatic environments, demonstrating enhanced sorption capabilities through chemical modifications. Additionally, combining mineral and carbonaceous phases in adsorbents increases PFAS binding strength, showcasing the potential of mixed adsorbents for improved PFAS removal. The unique properties of graphene, such as large surface area and functional groups, contribute to its efficiency in adsorbing various pollutants, including PFAS, making it a promising candidate for pollution remediation in both water and potentially soil environments.
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| Papers (5) | Insight |
|---|---|
20 Citations | Not addressed in the paper. |
| Graphene and functionalized graphene, especially GR-NH2, show promise as absorbents for PFAS remediation due to nanobubble contributions, as supported by simulations and experimental results. | |
32 Citations | Mixed mineral and graphene/carbon-based materials, like FeG and RemB, show enhanced sorption of PFASs, highlighting graphene's potential for PFAS remediation. |
| A graphene-based hydrogel monolith with tailored surface chemistry is effective for PFAS passive sampling, showing potential for PFAS remediation due to its high sorption capacity and chemical modification capabilities. | |
5 Citations | Inexpensive graphite adsorbents show reversible adsorption and desorption of PFAS via an alternating electric field, demonstrating potential for PFAS remediation. |
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Carbon-Based Adsorbents for PFAS Remediation - Carbon Nanotubes?4 answersCarbon-based adsorbents, such as carbon nanotubes, have shown promising potential for PFAS remediation. Studies have highlighted the exceptional adsorption properties of carbon nanotubes due to their high surface area, porosity, and various adsorption sites. Functionalization of carbon nanotubes can enhance their adsorptive properties, making them selective towards specific pollutants like PFAS. Carbon nanotubes interact with PFAS through mechanisms like physical adsorption, electrostatic interactions, and chemical bonding. Additionally, novel nanocomposites like nNiFe-activated carbon have demonstrated significant PFAS reduction and fluoride generation, showing promise for PFAS transformation in both batch and flow conditions. These findings suggest that carbon-based adsorbents, including carbon nanotubes and nanocomposites, hold great potential for effective PFAS remediation strategies.
How effective are emerging technologies for removing PFAS from contaminated water sources?5 answersEmerging technologies show promise in effectively removing per- and polyfluoroalkyl substances (PFAS) from contaminated water sources. Various methods have been explored, including nanofiltration with mixed-matrix-composite membranes, photo-induced degradation techniques, foam fractionation combined with electrochemical oxidation, and in situ treatment using colloidal activated carbon injected at the air-water interface within PFAS source zones. These technologies have demonstrated significant PFAS removal efficiencies, with approaches like foam fractionation and electrochemical oxidation achieving up to 50% total PFAS degradation and a decrease in toxic potency of the water. Nanofiltration with mixed-matrix-composite membranes has shown near-complete removal of model PFAS, emphasizing the potential for scalable and cost-effective treatment methods. Overall, these emerging technologies offer promising solutions for addressing PFAS contamination in water sources.
Removing pfas from water?5 answersA variety of methods have been proposed for removing PFAS from water. One approach is the use of activated carbon (AC) and aeration, which has been shown to enhance the removal of PFAS. Another method involves the use of anion exchange resins, which can effectively remove PFAS from water. Additionally, the development of PFAS-removing filters has been celebrated as a new advancement in water utility. Groundwater can also be a significant source of PFAS exposure in drinking water, and efforts are being made to develop standards for PFAS compounds. Furthermore, a water pollution treatment method involving the use of active bacteria and adsorbents has been proposed for removing impurities, including PFAS, from water.
How to clean blood of graphene ?5 answersGraphene can be cleaned from blood using various methods. One method involves using an ultrasonic processing (UP) step to etch copper and clean the bottom surface of graphene. Another method involves using a device with graphene sheets that have apertures to isolate substances from blood. Additionally, a graphene stripping device can be used to obtain large-area defect-free graphene by implementing rapid directional arrangement of graphite flakes and playing a shearing effect. Furthermore, a superhydrophobic surface made of graphene and titanium dioxide nanoparticles can be dip-coated on a film to enhance biocompatibility and inhibit biofilm formation. Lastly, a large-scale clean preparation method for graphene involves dispersing graphite raw material in a suspension, subjecting it to ultrasonic treatment, and then stripping off the graphene under a high-speed air flow.