Fabrication of basalt embedded composite fiber membrane using electrospinning method and response surface methodology

Abstract

In this study, a novel basalt embedded fiber membranes was prepared by the electrospinning method. The effects of the feed rate, voltage, tip to collector distance, and the basalt content on the prepared composite fiber membranes were investigated and optimized using the response surface method. Four models were built to compare the fibers in terms of deionized water flux (DWF), activated sludge flux, chemical oxygen demand (COD) removal, and porosity of fiber membranes. All the developed models were significant and adequately precise. The maximum flux of DWF was obtained when the voltage was 17.25 kV, the tip to collector distance of 19 cm, and a basalt content in polymer of 1.25%. COD removal decreased at higher voltage values as the feed rate increased. The porosity, pore size, and the contact angle values decreased for basalt embedded fiber membrane. The increases in the basalt percentage in polymer increased the hydrophilicity of the fiber. The flux decline for the basalt embedded fiber membrane was compared with the pristine fiber membrane. The permeate fluxes of pristine and basalt embedded fiber membranes were 42.3 and 59.6 L/m 2 /h, respectively. The biofouling performances of pristine and basalt embedded fiber membranes were also examined. Irreversible fouling decreased from 42.9% to 8.0%, and reversible fouling increased from 56.5% to 91.1% after modification of the membrane with basalt powder. Scanning electron microscopy with energy dispersive X-ray analysis (SEM-EDX) analysis showed that basalt powder was successfully embedded into polyether sulfone polymer.

Chitosan Based Layers for Biomedical and Environmental Applications

“…As another popular method, electrospinning, is one of the most effective PSPRJ.000608. 5(2).2023 technologies for preparation of nano/micro fibrous membranes [42][43][44]. The method is based on the formation of fibers in the collector plate by stretching the chitosan polymer in jet form under the electrical field created by a high voltage power source.…”

From Hazardous Chrysotile and Polyamide Wastes into Sustainable Serpentine/Polyamide Nanocomposite Membrane: Fabrication, Characterization, and Environmental Application

“…Different fibrous composite membranes were created using polyamide (PA) as base layers together with a variety of materials, such as zeolite, fresh basalt, weathered basalt, carbon nanotubes, graphene oxide, etc. [5,24]. The present work aims to sustainably remediate dye (MB and MO) and heavy metal (FeIII) contaminants from aqueous solutions using innovative serpentine/polyamide membrane (SP/PAM) composite fabricated grounding on mining (Ctl as hydrophilic part) and industrial (PA6 as hydrophobic part) wastes via electro-spinning technique.…”