Novel electroblowing synthesis of submicron zirconium dioxide fibers : effect of fiber structure on antimony(v) adsorption
|Author:||Paajanen, Johanna1; Lönnrot, Satu1; Heikkilä, Mikko1;|
1Department of Chemistry, FI-00014 University of Helsinki, Finland
2Department of Applied Physics, FI-00076 AALTO, Finland
3Environmental and Chemical Engineering, Faculty of Technology, FI-90014 University of Oulu, Finland
|Online Access:||PDF Full Text (PDF, 1.6 MB)|
|Persistent link:|| http://urn.fi/urn:nbn:fi-fe2020042422371
Royal Society of Chemistry,
|Publish Date:|| 2020-04-24
Both stable and radioactive antimony are common industrial pollutants. For antimonate (Sb(V)) removal from industrial waste water, we synthesized submicron zirconium dioxide (ZrO₂) fibers by electroblowing and calcination of the as-electroblown fibers. The fibers are amorphous after calcination at 300 and 400 °C and their average diameter is 720 nm. The fibers calcined at 500 to 800 °C have an average diameter of 570 nm and their crystal structure transforms from tetragonal to monoclinic at the highest calcination temperatures. We investigated Sb(V) adsorption capacity of the synthesized ZrO₂ fibers as a function of pH, adsorption isotherm at pH 6 and adsorption kinetics at pH 7. The tetragonal ZrO₂ fibers calcined at 500 °C exhibited the best potential for Sb(V) remediation with Sb(V) uptake of 10 mg g⁻¹ at pH 2 and a maximum Sb(V) uptake of 8.6 mg g⁻¹ in the adsorption isotherm experiment. They also reached 30% of 7 days’ Sb(V) uptake in only a minute. The adsorption kinetics followed the Elovich model.
|Pages:||4373 - 4383|
|Type of Publication:||
A1 Journal article – refereed
|Field of Science:||
114 Physical sciences
J. Paajanen and S. Lönnrot thank Fortum Power and Heat Oy for financial support for the research.
This journal is © The Royal Society of Chemistry 2019. This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence.