Euler’s Numerical Method for Ions Rejection Reassessment of a Defect-Free Synthesized Nanofiltration Membrane with Ultrathin Titania Film as the Selective Layer

Coatings

Arcadius Degan¹  Jimin Shen²  Yingxu Gong²  Zhonglin Chen²  Pengwei Yan²  Jing Kang²  Chabi Noël Worou²  Weiqiang Wang² 

[1] Laboratory of Mechanics and Energetics Applied, Polytechnic School of Abomey-Calavi, Cotonou 01 BP 2009, Benin;State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, No.73, Huanghe Road, Nangang District, Harbin 150090, China;

关键词: titanium nanoparticles;    soft computing;    salt rejection;    nanofiltration membrane;    Euler numerical method;   

DOI  :  10.3390/coatings11020184

来源: DOAJ

【 摘 要 】

Titanium (Ti) nanoparticles (NPs) were successfully seeded on the platform of a polyacrylonitrile (PAN) ultrafiltration (UF) membrane previously coated with bio-glue (a co-deposition of dopamine hydrochloric bicarbonate buffer having undergone pyrocatechol deprotonation). The tools in vogue, especially field emission scanning electron microscopy (FESEM), energy dispersive spectroscopy (EDS), and atomic force microscopy (AFM), have made it possible to fully characterize the structure of the new organic-inorganic nanofiltration (NF) membrane, namely NF_PAN_Ti. A soft computing model has been applied to make commonplace the complex and implicit extended Nernst–Planck equations that govern the transport of ions through NF membranes. Euler’s numerical method was applied with a small step-size and the results obtained were very interesting. The filtration velocity approach of GUEROUT-ELFORD-FERRY helped to estimate the average pore size of NF_PAN_Ti to r_p = 0.538 nm. A six-day test carried out on NF_PAN_Ti demonstrated its long-term stability and showed a steady-rejection rate of 89.3% of MgCl₂ salt and permeate flux of 56 L·m⁻²·h⁻¹. The Euler’ numerical method corroborated perfectly the experimental findings since the relative error was found to be very low at 0.33% for Cl⁻and 0.09% for Mg²⁺ (RE << 0.1). These practical prediction tools may henceforth help in the choice and calibration of next-generation NF membranes’ synthesis.

【 授权许可】

Unknown