PDF Publication Title:
Text from PDF Page: 014
Separations 2022, 9, 180 14 of 16 References followed by the IP process of PEI and TMC on the interlayer. The concentrations of PEI (0.6 wt%), TMC (0.1 wt%), g-C3N4 (0.02 wt%, stripping 96 h), and interlayer reaction time ◦ (2 h) are optimized. The final NF membrane (M5) has a low WCA (55.5 ) and the IEP is 6.01, which is attributed to the hydrophilic, positively charged active separation layer on the NF membrane surface resulting from the IP process of PEI and TMC. Notably, the permeance of the M5 membrane is up to 10.19 L·m−2·h−1·bar−1 and the rejection of Mg2+ is 98.2%. This is because the use of PDA-g-C3N4 as the interlayer is conducive to the penetration and diffusion of water molecules on the membrane surface. The high permeance will not affect the salt rejection rate, which is mainly due to the pore size of the NF membrane and the strong electrostatic repulsion between the abundant positive charges and the polyvalent cations on the membrane surface. The M5 membrane also has good and stable separa- tion performance for complex salt lake brine and antifouling property. To conclude, the as-prepared positively charged NF membrane has the potential to be used for recovering Li+ from brine due to its ready availability, high efficiency, and good adaptability. Author Contributions: Conceptualization, Q.B.; Data curation, L.M., F.Q., H.Z. and Y.G.; Formal anal- ysis, L.M., F.Q., H.Z. and Y.G.; Funding acquisition, Q.B. and S.X.; Investigation, L.M.; Methodology, L.M., C.Z. and S.X.; Resources, S.X.; Supervision, Y.T., C.Z. and S.X.; Writing—original draft, L.M.; Writing—review & editing, Q.B., Y.T. and S.X. All authors have read and agreed to the published version of the manuscript. Funding: This research was funded by the National Natural Science Foundation of China (U20A20139), the Foundation from Qinghai Science and Technology Department (2020-HZ-808, 2021-ZJ-939Q), Thousand Talents Program of Qinghai Province, Scientific Research Fund of Young Teachers in Qinghai University (2020-QGY-6, 2022-QGY-7), and the Innovation and Entrepreneurship Program of Qinghai University (2021-QX-23). Acknowledgments: This research is financially supported by the National Natural Science Foun- dation of China (U20A20139), the Foundation from Qinghai Science and Technology Department (2020-HZ-808, 2021-ZJ-939Q), Thousand Talents Program of Qinghai Province, Scientific Research Fund of Young Teachers in Qinghai University (2020-QGY-6, 2022-QGY-7), and the Innovation and Entrepreneurship Program of Qinghai University (2021-QX-23). Conflicts of Interest: The authors declare no conflict of interest. 1. Xu, S.S.; Song, J.F.; Bi, Q.Y.; Chen, Q.; Zhang, W.M.; Qian, Z.X.; Zhang, L.; Xu, S.A.; Tang, N.; He, T. Extraction of lithium from Chinese salt-lake brines by membranes: Design and practice. J. Membr. Sci. 2021, 635, 119441. [CrossRef] 2. Li, N.; Guo, C.S.; Shi, H.T.; Xu, Z.W.; Xu, P.; Teng, K.Y.; Shan, M.J.; Qian, X.M. Analysis of Mg2+/Li+ separation mechanism by charged nanofiltration membranes: Visual simulation. Nanotechnology 2021, 32, 085703. [CrossRef] 3. Zhang, C.Y.; Mu, Y.X.; Zhao, S.; Zhang, W.; Wang, Y.X. Lithium extraction from synthetic brine with high Mg2+/Li+ ratio using the polymer inclusion membrane. Desalination 2020, 496, 114710. [CrossRef] 4. Swain, B. Recovery and recycling of lithium: A review. Sep. Purif. Technol. 2017, 172, 388–403. [CrossRef] 5. Liu, G.; Zhao, Z.W.; He, L.H. Highly selective lithium recovery from high Mg/Li ratio brines. Desalination 2020, 474, 114185. [CrossRef] 6. Sun, Y.; Wang, Q.; Wang, Y.H.; Yun, R.P.; Xu, X. Recent advances in magnesium / lithium separation and lithium extraction technologies from salt lake brine. Sep. Purif. Technol. 2021, 256, 117807. [CrossRef] 7. Tabelin, C.B.; Dallas, J.; Casanova, S.; Pelech, T.; Bournival, G.; Saydam, S.; Canbulat, I. Towards a low-carbon society: A review of lithium resource availability, challenges and innovations in mining, extraction and recycling, and future perspectives. Miner. Eng. 2021, 163, 106743. [CrossRef] 8. Shao, W.Y.; Liu, C.R.; Yu, T.; Xiong, Y.; Hong, Z.; Xie, Q.L. Constructing Positively Charged Thin-Film Nanocomposite Nanofiltra- tion Membranes with Enhanced Performance. Polymers 2020, 12, 2526. [CrossRef] [PubMed] 9. Zhang, Y.; Wang, L.; Sun, W.; Hua, Y.H.; Tang, H.H. Review Membrane technologies for Li+/Mg2+ separation from salt-lake brines and seawater: A comprehensive review. J. Ind. Eng. Chem. 2020, 81, 7–23. [CrossRef] 10. Saif, H.M.; Huertas, R.M.; Pawlowski, S.; Crespo, J.G.; Velizarov, S. Development of highly selective composite polymeric membranes for Li+/Mg2+ separation. J. Membr. Sci. 2021, 620, 118891. [CrossRef] 11. Wu, H.H.; Lin, Y.K.; Feng, W.Y.; Liu, T.Y.; Wang, L.; Yao, H.; Wang, X.L. A novel nanofiltration membrane with [MimAP][Tf2N] ionic liquid for utilization of lithium from brines with high Mg2+/Li+ ratio. J. Membr. Sci. 2020, 603, 117997. [CrossRef]PDF Image | Nanofiltration Membrane Using Polydopamine Carbon Nitride
PDF Search Title:
Nanofiltration Membrane Using Polydopamine Carbon NitrideOriginal File Name Searched:
separations-09-00180.pdfDIY PDF Search: Google It | Yahoo | Bing
Product and Development Focus for Infinity Turbine
ORC Waste Heat Turbine and ORC System Build Plans: All turbine plans are $10,000 each. This allows you to build a system and then consider licensing for production after you have completed and tested a unit.Redox Flow Battery Technology: With the advent of the new USA tax credits for producing and selling batteries ($35/kW) we are focussing on a simple flow battery using shipping containers as the modular electrolyte storage units with tax credits up to $140,000 per system. Our main focus is on the salt battery. This battery can be used for both thermal and electrical storage applications. We call it the Cogeneration Battery or Cogen Battery. One project is converting salt (brine) based water conditioners to simultaneously produce power. In addition, there are many opportunities to extract Lithium from brine (salt lakes, groundwater, and producer water).Salt water or brine are huge sources for lithium. Most of the worlds lithium is acquired from a brine source. It's even in seawater in a low concentration. Brine is also a byproduct of huge powerplants, which can now use that as an electrolyte and a huge flow battery (which allows storage at the source).We welcome any business and equipment inquiries, as well as licensing our turbines for manufacturing.CONTACT TEL: 608-238-6001 Email: greg@infinityturbine.com (Standard Web Page)