کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
147993 | 456403 | 2014 | 9 صفحه PDF | دانلود رایگان |
• CNTs have offered higher hydrophilicity to PES/f-MWCNTs nanocomposite membranes.
• PES/f-MWCNTs membranes showed good rejection capability.
• Rejection efficiency has improved without compromising the permeability.
Functionalised multi-walled carbon nanotubes (f-MWCNTs) in different concentrations were incorporated into polyethersulfone (PES) to fabricate PES/f-MWCNTs nanocomposite membranes for ultrafiltration studies. MWCNTs were synthesized by chemical vapour deposition method that were later functionalised using concentrated acids (H2SO4/HNO3) to impart hydroxyl and carboxyl functional groups on its side walls. Hydrophilic property of PES-f-MWCNTs, identified by the contact angle measurement, was improved by 18.7% more than that of neat PES membrane. The pure water flux increased from 24.28 L m−2 h−1 to 53.91 L m−2 h−1 on addition of 0.5 wt.% of f-MWCNTs to PES. The increase in flux is attributed to the surface hydrophilicity of PES-f-MWCNTs and it also clearly signifies the impact of functionalised MWCNTs on PES. Solute separation studies were performed wherein 27–30% rejection, much higher than that of neat PES membrane, was observed. Treatment of Kraft paper mill effluent with and without lignin recovery was also investigated by analysing the performance of PES-f-MWCNTs nanocomposite membranes on colour, chemical oxygen demand (COD) and total dissolved solids (TDS) reduction.
Nanocomposite membrane formed from Polyethersulfone and functionalised multi walled carbon nanotubes..Figure optionsDownload as PowerPoint slide
Journal: Chemical Engineering Journal - Volume 236, 15 January 2014, Pages 369–377