Nanocomposite Substrate-Supported Nanofiltration Membrane for the Efficient Treatment of Rare Earth Wastewater
KAUST DepartmentAdvanced Membranes & Porous Materials Center, King Abdullah University of Science and Technology, Division of Physical Sciences and Engineering, Thuwal 23955-6900, Kingdom of Saudi Arabia
Physical Science and Engineering (PSE) Division
Advanced Membranes and Porous Materials Research Center
Permanent link to this recordhttp://hdl.handle.net/10754/677966
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AbstractRare earth wastewater is an emerging wastewater featuring high salinity, strong acidity and a complex background with multiple contaminants. A nanofiltration (NF) membrane with better performance is desired to tackle the challenge of rare earth wastewater to reduce its negative impact on the environment. Herein, a novel nanocomposite substrate-supported thin film composite (TFC) NF membrane with good stability and superior separation performance was reported. The inorganic two-dimensional O-MoS2 nanosheets were embedded into the PSf substrate via a nonsolvent-induced phase inversion method. The PSf/O-MoS2 nanocomposite was used as the support for the interfacial polymerization. the pore structure of the substrate shifted from a larger irregular bubble pore structure into a finger-like porous structure when the content of O-MoS2 was 0.06 wt%. As a result, the nanocomposite substrate-supported TFC membrane had a 1.7 times higher water flux and improved salt rejections compared to that of the control membrane. The obtained NF membrane showed excellent separation performance with a high salinity removal efficiency of 95% in treating real rare earth wastewater (diluted 50 times, pH: 2.46). This work also highlights the modification of the substrate by functional nanomaterials could provide versatile ways to improve the separation performance and stability of TFC membranes.
CitationWang, Y., Jiang, Q., Li, Y., Fan, H., Gui, S., Xiong, J., & Luo, J. (2022). Nanocomposite Substrate-Supported Nanofiltration Membrane for the Efficient Treatment of Rare Earth Wastewater. SSRN Electronic Journal. https://doi.org/10.2139/ssrn.4010370
SponsorsSupported by grants from the Postdoctoral Project Funding, the PhD Project (No. 2019-YYB-05) and Generalized System of Preferences -One Type Project (No. 2019-XTPH1-05) of Jiangxi Academy of Sciences, the key research and development - key project of Jiangxi Province, China (No. 20212BBG71001).