Details

Autor(en) / Beteiligte

• Zhang, Simeng
• Wang, Rongshu
• Zhang, Shaofeng
• Li, Guoling
• Zhang, Yuqing

Titel

Treatment of wastewater containing oil using phosphorylated silica nanotubes (PSNTs)/polyvinylidene fluoride (PVDF) composite membrane

Ist Teil von

• Desalination, 2014-01, Vol.332 (1), p.109-116

Ort / Verlag

Amsterdam: Elsevier B.V

Erscheinungsjahr

2014

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• PVDF membranes are broadly applied in many fields owing to their good physicochemical stability, resistance to oxidation and chlorine. However when treating with wastewater, PVDF membranes are easily contaminated by pollutant, degrading their properties due to the hydrophobicity and poor anti-compaction capabilities, which can result in the decline of flux and lifespan of the membrane and limit their application in large scale. To enhance the integrative capabilities of PVDF membrane, phosphorylated silica nanotubes (PSNTs) were doped to PVDF to prepare a novel PSNTs/PVDF composite membrane through a phase inversion technique. The PSNTs/PVDF composite membranes were exposed to wastewater containing oil, and the effects of doped materials, operating pressure and operating temperature on fluxes were researched. The optimum parameters are: operating pressure is 0.1MPa, operating temperature 25°C. Through physical flushing and chemical cleaning, the PSNTs/PVDF membranes could still keep a high permeation flux and long lifetime. Finally, the interaction mechanism between PSNTs and PVDF membrane, the anti-fouling mechanism of PSNTs/PVDF composite membrane were explored and analyzed. The results show that the hydrophilicity, anti-fouling and anti-compaction properties of composite membrane can be obviously enhanced and hence the PSNTs/PVDF composite membrane is desirable in the treatment of wastewater containing oil and sewage. •PSNTs/PVDF composite membrane was successfully prepared.•PSNTs/PVDF composite membrane has the better integrative properties.•PSNTs/PVDF composite membrane has the better anti-fouling abilities.•PSNTs/PVDF composite membrane is desirable in the treatment of sewage.