Synthesis of shape and structure-dependent hydroxyapatite nanostructures as a superior adsorbent for removal of U(VI)

Ningchao Zheng, Lanyan Yin, Minhua Su, Zequan Liu, Daniel C.W. Tsang, Diyun Chen

Research output: Journal article publicationJournal articleAcademic researchpeer-review

14 Citations (Scopus)

Abstract

Highly efficient removal of U(VI) from uranium-containing wastewaters is urgently needed with the global nuclear energy exploitation. Herein, we design a large-scale fabrication of shape and structure-dependent hydroxyapatite (HAP) nanostructures produced using a facile hydrothermal method in absence of any organic solvents and templates. It was found that the hydrothermal reaction temperature was a vital factor affecting the morphology (turned from nanosheets to nanoribbons and finally to nanoblocks) and structure (turned from monetite to hydroxyapatite and from calcium hydrogen phosphate hydrate to hydroxyapatite) of HAP. Moreover, the obtained HAP-180 exhibits highly efficient removal of U(VI) (99.3% removal of U(VI) within 30 s), and with the maximum adsorption capacity of 2024 mg/g, which is higher than those of HAP-120, HAP-150 and other materials previously reported. The superior removal performance is ascribed to the specific structure of HAP-180 and effective complexation with U(VI) ions. The findings of this work indicate that the morphology and structure of HAP can be feasible adjustment, and it is promising as environmental remediation material for U(VI) clean-up.

Original languageEnglish
Article number123262
JournalChemical Engineering Journal
Volume384
DOIs
Publication statusPublished - 15 Mar 2020

Keywords

  • Complexation
  • HAP
  • Removal
  • Shape and structure-control
  • Uranium

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

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