期刊
CHEMICAL ENGINEERING JOURNAL
卷 384, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2019.123348
关键词
Functionalized carbon nanotubes; Thin-film nanocomposite; Nanofiltration membrane; Chlorine resistance; Acid resistance
资金
- University of Sistan and Baluchestan, Iran
- Waste2Product project - Spanish Ministry of Economy and Competitiveness (MINECO) [CTM2014-57302-R]
- R2MIT project - Spanish Ministry of Economy and Competitiveness (MINECO) [CTM2017-85346-R]
- Catalan Government [2017-SGR312]
- MINECO [BES-2015-075051]
A thin-film nanocomposite nanofiltration (TFN-NF) membrane was fabricated through blending a novel aromatic amine-functionalized multiwalled carbon nanotubes (AAF-MWCNTs) and an aliphatic amine-functionalized multiwalled carbon nanotubes (AF-MWCNTs). The polyamide layer was synthesised by interfacial polymerisation (IP) between piperazine and trimesoyl chloride monomers. The improved resistance of NF membranes to chlorine and acid were characterised by X-ray photoelectron spectroscopy (XPS), field emission-scanning electron microscopy, atomic force microscopy, attenuated total reflectance-Fourier transform infrared spectroscopy, contact angle, and zeta potential measurements. XPS analysis confirmed chlorine and acid resistance properties, as well as an improvement in the polyamide network cross-linking degree of the new nanofiltration membranes incorporated with AAF-MWCNTs (AAF-NF). The membrane transport properties and the performance on the rejection of HAsO4-2, NO3-, and NH4+ from solutions mimicking polluted groundwater were evaluated. Membrane performance to the target pollutants were determined by the solution-electro-diffusion (SED) model coupled with reactive transport. The results showed that AAF-NF membranes, with long-lifetimes, could be applied for the removal of As(V) from polluted groundwater. Water permeate flux and the arsenic rejection of the AAF-NF membrane increased by 15% when it is compared with a typical commercial semi-aromatic polyamide nanofiltration membranes (Desal DL).
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