Electrospun sodium titanate fibres for fast and selective water purification

Abstract

From the environmental and end-users' viewpoints, electrospun ion exchange fibres provide highly efficient and sustainable material for separation of for example trace pollutants, such as radionuclides and heavy metals. This work aimed to reduce the amount of ion exchange material needed per unit volume of raw material subjected to an ion exchange process. We present a very simple process to electrospinning of sodium titanate fibres, but also test results of ion exchange kinetics measurements. Sodium titanate fibres are very promising material and it is possible that by exploiting electrospun inorganic sub-micron fibres the ion exchanger mass required for a given capacity can be decreased significantly.

Removal of Radionuclides from Fukushima Daiichi Waste Effluents

“…There are, however, limits for this due to buildup of pressure across the column. To overcome this problem methods to use of inorganic ion exchangers in powderform or as fibres have been developed (47,48).…”

Novel electroblowing synthesis of tin dioxide and composite tin dioxide/silicon dioxide submicron fibers for cobalt(ii) uptake

“…In regard to the SnO 2 /SiO 2 fibers with a brownish hue, both the lower calcination temperature of 400 °C and the presence of SiO 2 probably cause incomplete combustion of the PVP. Based on TG analysis, 53 combustion of the bare PVP fibers is not complete until at 700 °C and hence there may be carbon residues in the calcined fibers although not necessarily to a visible extent. The amorphous SiO 2 phase in the composite fibers may be more prone to retain the amorphous polymer compared to the crystalline SnO 2 fibers and SiO 2 and PVP are known to form hydrogen bonds.…”

Novel electroblowing synthesis of submicron zirconium dioxide fibers: effect of fiber structure on antimony(v) adsorption

“…Most of the mass loss, i.e. combustion of the polymer, takes place in a temperature range of 300 to 500 C. For bare PVP under air, the complete combustion takes place in a temperature range of 300 to 700 C. 45 Based on the results of the TG analysis, the weight of the pure ZrO 2 bers is 30% of the weight of the initial ZrO 2 /PVP composite bers. This is in accordance with our other experimental results.…”