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

Johanna Paajanen*, Satu Lönnrot, Mikko Heikkilä, Kristoffer Meinander, Marianna Kemell, Timo Hatanpaä, Kaisu Ainassaari, Mikko Ritala, Risto Koivula

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

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.

Original languageEnglish
Pages (from-to)4373-4383
Number of pages11
JournalNanoscale Advances
Volume1
Issue number11
DOIs
Publication statusPublished - 1 Jan 2019
MoE publication typeA1 Journal article-refereed

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