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|Title:||Poly(vinylidene fluoride-hexafluoropropylene)/bayerite composites membranes for efficient arsenic water removal|
Pereira, João Pedro Nunes
Correia, D. M.
Cardoso, V. F.
Martins, P. M.
Martinse, M. D.
|Publisher:||Elsevier Science SA|
|Journal:||Materials Chemistry and Physics|
|Citation:||Salazar, H., Nunes-Pereira, J., Correia, D. M., Cardoso, V. F., Goncalves, R., Martins, P. M., . . . Lanceros-Mendez, S. (2016). Poly(vinylidene fluoride-hexafluoropropylene)/bayerite composite membranes for efficient arsenic removal from water. Materials Chemistry and Physics, 183, 430-438. doi: 10.1016/j.matchemphys.2016.08.049|
|Abstract(s):||Polymer composite membranes based on poly(vinylidenefluoride-hexafluoropropylene), PVDF-HFP, with different aluminum hydroxide, bayerite polymorph, filler content were prepared by solvent casting for arsenic water removal by filtration and adsorption. Morphological, structural and mechanical characterization of the membranes were performed in order to assess their main properties for the intended application. The arsenic removal efficiency of the membranes was also evaluated. Composite membranes presented a homogeneous porous structures, of hydrophobic nature (contact angle >90 ), with a degree of porosity between 65 and 75 %, compressive strength >100 kPa and water flux ranging from 65 to 215 L/h.m2 . Further, arsenic rejections around 60 % were found after 1 h reaction in dead-end cell filtration tests of an arsenic standard solution of 100 µg/L. A bayerite arsenic adsorption mechanism was also proposed. Thus, the PVDF- 2 HFP/bayerite composite membranes showed a suitable performance for arsenic removal in water purification systems.|
|Access:||Restricted access (UMinho)|
|Appears in Collections:||CDF - FCD - Artigos/Papers (with refereeing)|
CDQuim - Artigos (Papers)
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