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SELECTIVE AND FAST ADSORPTION OF PERFLUOROOCTANESULFONATE FROM WASTEWATER BY MAGNETIC FLUORINATED VERMICULITE
Du, Z., S. Deng, S. Zhang, W. Wang, B. Wang, J. Huang, Y. Wang, G. Yu, and B. Xing.
Environmental Science & Technology 51(14):8027-8035(2017)
Filed Under: Research
Filed Under: Research
A novel magnetic fluorinated adsorbent with selective and fast adsorption of PFOS was synthesized via simple ball milling of magnetite (Fe3O4) and vermiculite loaded with a cationic fluorinated surfactant. The loaded magnetite nanoparticles increased the dispersibility of fluorinated vermiculite (F-VT) in water and allowed magnetic separability. The nanosized magnetite was homogeneously embedded into the adsorbent surfaces, improving the hydrophilicity of the F-VT external surface. The hybrid adsorbent retained the hydrophobic fluorinated interlayer structure. With this unique property, magnetite-loaded F-VT has very fast and selective adsorption for PFOS in the presence of other compounds due to the fluorophilicity of C-F chains intercalated in the adsorbent interlayers. This novel adsorbent exhibited much higher PFOS removal from fire-fighting foam wastewater than powdered activated carbon and resin. The used megnetite-loaded F-VT was successfully regenerated by methanol and reused five times without reduction in PFOS removal and magnetic performance.
Environmental Science & Technology 51(14):8027-8035(2017)
Filed Under: Research
Filed Under: Research
A novel magnetic fluorinated adsorbent with selective and fast adsorption of PFOS was synthesized via simple ball milling of magnetite (Fe3O4) and vermiculite loaded with a cationic fluorinated surfactant. The loaded magnetite nanoparticles increased the dispersibility of fluorinated vermiculite (F-VT) in water and allowed magnetic separability. The nanosized magnetite was homogeneously embedded into the adsorbent surfaces, improving the hydrophilicity of the F-VT external surface. The hybrid adsorbent retained the hydrophobic fluorinated interlayer structure. With this unique property, magnetite-loaded F-VT has very fast and selective adsorption for PFOS in the presence of other compounds due to the fluorophilicity of C-F chains intercalated in the adsorbent interlayers. This novel adsorbent exhibited much higher PFOS removal from fire-fighting foam wastewater than powdered activated carbon and resin. The used megnetite-loaded F-VT was successfully regenerated by methanol and reused five times without reduction in PFOS removal and magnetic performance.
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