IJCEA 2024 Vol.15(2): 31-35
doi: 10.18178/ijcea.2024.15.2.820
Facile Fabrication of Positively Charged Nanofiltration Membrane for the Effective Separation of Cationic Dyes and Salt Mixtures
Yanyan Liu1,2,Songqing Hu1, and Bart Van Der Bruggen2,*
1. School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao, China
2. Department of Chemical Engineering, KU Leuven, Leuven, Belgium
Email: yanyan.liu@student.kuleuven.be (Y.L.); songqinghu@upc.edu.cn (S.H.); bart.vanderbruggen@kuleuven.be (B.V.D.B.)
*Corresponding author
Manuscript received April 22, 2024; revised June 25, 2024; accepted August 14, 2024; published September 20, 2024
Abstract—Textile wastewater often contains a significant number of cationic dyes, posing substantial environmental risks. To address this challenge, a simple fabrication procedure for synthesizing a positively charged membrane with high permeance and selectivity is needed to make this realistic. In this study, we developed a stable positively charged NF membrane by initially reacting P84 with Polyethyleneimine (PEI) and then further treating it with Trimesoyl Chloride (TMC). This involved casting a homogeneous P84 solution onto a non-woven support and immersing it into a PEI solution to create a P84/PEI membrane. The crosslinking reaction between PEI and the imide ring of P84 led to the formation of a stable P84/PEI structure with a hydrophilic surface and a positive charge. Subsequently, TMC was used in the IP process to create a dense separation layer. The optimal membrane, P84/PEI0.6/TMC0.05, exhibited an excellent water flux of 26.2 L m-2 h-1 bar-1 and high rejection for selected cationic dyes,including Rhodamine B (RhB), Janus Green B (JGB), CrystalViolet (CV), and Methylene Blue (MB), with rejection of 96.2%,99.8%, 99.8%, and 94.7%, respectively. This facile fabricationprocess could accelerate the development of positively chargedNF membranes to remove cationic dyes from industrialwastewater.
Keywords—positively charged nanofiltration membrane, dye/salt separation, textile treatment, crosslinking reaction
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Cite: Yanyan Liu, Songqing Hu, and Bart Van Der Bruggen, "Facile Fabrication of Positively Charged Nanofiltration Membrane for the Effective Separation of Cationic Dyes and Salt Mixtures," International Journal of Chemical Engineering and Applications vol. 15, no. 2, pp. 31-35, 2024.
