Influence of the polyacrylonitrile proportion on the fabricated UF blend membranes’ performance for humic acid removal

Abstract

<jats:title>Abstract</jats:title> <jats:p>Asymmetric blend membranes of polyethersulfone (PES)/polyacrylonitrile (PAN) were prepared and developed for ultrafiltration applications. The membranes were prepared by dissolving two polymers in N-methyl-2-pyrrolidone (NMP) as a solvent with diethylene glycol (DEG) and polyvinylpyrrolidone (PVP) as non-solvent and pore former, respectively. The produced membranes were characterized by scanning electron microscopy (SEM) and fourier transform infrared (FTIR) spectroscopy, and the hydrophilicity of membranes was tested by contact angle measurements. The performance of prepared membranes was carried out by an ultrafiltration testing unit, where the efficiency of membranes was determined according to the humic acid separation and treated water permeate flux. The results indicated that using 1 wt.% of PAN in polymer mixture provided a blending membrane with high mechanical properties and high performance; the humic acid rejection reached 92.47% with treated water permeate flux 70 l/m<jats:sup>2</jats:sup>·h at feed pressure 6 bar.</jats:p>

Biosensing of algal‐photosynthetic productivity using nanostructured bioelectrochemical systems

“…Anode and cathode chambers contained port (each port measured 14 mm in diameter). Polyethersulfone (PES) 18% treated with Nafion/MWCNTs was used as proton exchange membrane …”

“…Polyethersulfone (PES) 18% treated with Nafion/MWCNTs was used as proton exchange membrane. 25,26 Effect of substrate concentration on the performance of DCMFCs Four DCMFCs were set up for testing the bio-electrochemical performance of algal cells growing on glucose, sodium acetate, sodium butyrate and sodium citrate as sole C sources. The anolyte and catholyte were composed of 0.1 mol L -1 PBS (pH 7), 0.1 mol L -1 KCl and 5 g L -1 of each C source in each cell.…”

Water Purification using Recycled Polymeric Microfiltration Membranes

“…Previous studies reported the large effect of porosity on water permeability [14]. The higher porosity and lower water contact angle could cause an improvement in hydrophilicity [15][16]. The increasing in all these parameters (porosity, hydrophilicity, and water permeability) for 30 wt% membrane could be the reason for the improvement of their HA and Dye rejection index, especially the membrane hydrophilicity which inhibits interactions between the membrane surface and the organic solutes [14].…”

“…In the water purification process, natural organic materials, such as dyes and acids, are removed by ultrafiltration (UF) or microfiltration (MF) [2]. Humic acid (HA) is usually considered as a microbial incubator in water pipes, membrane foulant, and primary source of carcinogenic and mutagenic compounds such as disinfection byproducts [16]. Besides, Rhodamine B (RhB) dye also has a harmful biological impact when drained into water.…”

Low-Pressure Membrane for Water Treatment Applications

“…PAN (M3) provides the lowest removal and high permeate flux due to high porosity of the membrane as shown in Table 2. Also, PAN is a highhydrophilic membrane, but the membrane is brittle and the aggregation of it can occur after drying which can oppose its application [17,[20][21][22]. Dang et al studied the performance of ultrafiltration polyethersulfone membranes after the addition of hydrophilic modifier during membrane preparation; the experiments were carried out for long term using polyethylene glycol 600 and ethylene oxide as a feeding solution.…”