TY - JOUR
T1 - Fine-tuning of carbon nanostructures/alginate nanofiltration performance
T2 - Towards electrically-conductive and self-cleaning properties
AU - Aburabie, Jamaliah
AU - Nassrullah, Haya
AU - Hashaikeh, Raed
N1 - Funding Information:
This work was supported by the New York University Abu Dhabi (NYUAD) Water Research Center and funded by Tamkeen Research Institute Award (project CG007). The authors would like to acknowledge Renu Pasricha, Sneha Thomas (TEM imaging), and James Weston (EDX) for assisting with this work.
Publisher Copyright:
© 2022 Elsevier Ltd
PY - 2023/1
Y1 - 2023/1
N2 - Electrically-conductive membranes became the center of attention owing to their enhanced ion selectivity and self-cleaning properties. Carbon nanostructures (CNS) attain high electrical conductivity, and fast water transport. Herein, we adopt a water-based, simple method to entrap CNS within Alginate network to fabricate self-cleaning nanofiltration membranes. CNS are embedded into membranes to improve the swelling/shrinkage resistivity, and to achieve electrical-conductivity. The CaAlg PEG-formed pores are tuned by organic-inorganic network via silane crosslinking. Flux/rejection profiles of Na2SO4 are studied/optimized in reference to fabrication parameters. 90% Na2SO4 rejection (7 LMH) is achieved for silane-CaAlg200-10% CNS membranes. Membranes exhibit outstanding electrical conductivity (∼2858 S m−1), which is attractive for fouling control. CaAlg/CNS membranes are tested to treat dye/saline water via two-stage filtration, namely, dye/salt separation and desalination. A successful dye/salt separation is achieved at the first stage with a rejection of 100%-RB and only 3.1% Na2SO4, and 54% Na2SO4 rejection in the second stage.
AB - Electrically-conductive membranes became the center of attention owing to their enhanced ion selectivity and self-cleaning properties. Carbon nanostructures (CNS) attain high electrical conductivity, and fast water transport. Herein, we adopt a water-based, simple method to entrap CNS within Alginate network to fabricate self-cleaning nanofiltration membranes. CNS are embedded into membranes to improve the swelling/shrinkage resistivity, and to achieve electrical-conductivity. The CaAlg PEG-formed pores are tuned by organic-inorganic network via silane crosslinking. Flux/rejection profiles of Na2SO4 are studied/optimized in reference to fabrication parameters. 90% Na2SO4 rejection (7 LMH) is achieved for silane-CaAlg200-10% CNS membranes. Membranes exhibit outstanding electrical conductivity (∼2858 S m−1), which is attractive for fouling control. CaAlg/CNS membranes are tested to treat dye/saline water via two-stage filtration, namely, dye/salt separation and desalination. A successful dye/salt separation is achieved at the first stage with a rejection of 100%-RB and only 3.1% Na2SO4, and 54% Na2SO4 rejection in the second stage.
KW - Alginate
KW - Electrically-conductive
KW - Nanofiltration
KW - Organosilicone precursor
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U2 - 10.1016/j.chemosphere.2022.136907
DO - 10.1016/j.chemosphere.2022.136907
M3 - Article
C2 - 36265705
AN - SCOPUS:85140337669
SN - 0045-6535
VL - 310
JO - Chemosphere
JF - Chemosphere
M1 - 136907
ER -