Jump to main content
Jump to site search

Issue 46, 2017
Previous Article Next Article

Controlled fabrication of flower-like α-zirconium phosphate for the efficient removal of radioactive strontium from acidic nuclear wastewater

Author affiliations

Abstract

Highly efficient and low cost removal of radioactive 90Sr from high level liquid waste (HLLW) is a key step for safe and long-term storage of nuclear waste. Herein, for the first time, we reported a novel flower-like α-ZrP material, which was prepared via a simple and economical low-temperature solid state synthesis approach. The formation mechanism of flower-like α-ZrP was investigated by changing the reaction time, temperature and phosphate precursor. Remarkably, the flower-like α-ZrP possesses desirable properties: a large surface area, and excellent resistance to acid and radiation, promoting its application in HLLW disposal. A batch of adsorption experiments indicated that flower-like α-ZrP exhibits great efficiency for the removal of Sr2+ from aqueous solution, and the maximum monolayer adsorption capacity for Sr2+ is 293.43 mg g−1, which surpasses those of most of the reported adsorbents. The improved adsorption ability is mainly attributed to the larger surface area of the flower-like morphology of α-ZrP, which provides many more adsorption sites for strontium ions. Moreover, the flower-like α-ZrP shows particular selectivity for the removal of Sr2+ from a simulated HLLW (1 M HNO3 solution, containing about 13 different kinds of metal elements). The adsorbed Sr2+ ions can be effectively stripped with a dilute HCl solution, and the regenerated α-ZrP adsorbent can be re-used at least five times without significant loss of Sr2+ adsorption capacity. Besides, the concrete mechanism of the strontium–adsorbent interaction was also demonstrated in this contribution. Our preliminary results suggested that flower-like α-ZrP could be potentially used as a highly effective material for the enrichment and removal of radioactive strontium from HLLW.

Graphical abstract: Controlled fabrication of flower-like α-zirconium phosphate for the efficient removal of radioactive strontium from acidic nuclear wastewater

Back to tab navigation

Supplementary files

Publication details

The article was received on 05 Sep 2017, accepted on 06 Nov 2017 and first published on 06 Nov 2017


Article type: Paper
DOI: 10.1039/C7TA07803J
Citation: J. Mater. Chem. A, 2017,5, 24388-24395
  •   Request permissions

    Controlled fabrication of flower-like α-zirconium phosphate for the efficient removal of radioactive strontium from acidic nuclear wastewater

    W. Mu, Q. Yu, R. Zhang, X. Li, R. Hu, Y. He, H. Wei, Y. Jian and Y. Yang, J. Mater. Chem. A, 2017, 5, 24388
    DOI: 10.1039/C7TA07803J

Search articles by author

Spotlight

Advertisements