Selective adsorption of Cs+ by MXene (Ti3C2Tx) from model low-level radioactive wastewater

Byung Moon Jun, Min Jang, Chang Min Park, Jonghun Han, Yeomin Yoon

Research output: Contribution to journalArticlepeer-review

83 Scopus citations

Abstract

This study explored whether MXene (Ti3C2Tx) could remove radioactive Cs+ from model nuclear wastewater. Various adsorption tests were performed and the physical aspects of the interaction were investigated. We varied the MXene dosage, Cs+ initial concentration, solution pH, solution temperature and exposure time. MXene adsorption exhibited very fast kinetics, based on the fact that equilibrium was achieved within 1 h. MXene exhibited an outstanding adsorption capacity (148 mg g−1) at adsorbent and adsorbate concentrations of 5 and 2 mg L−1, respectively, at neutral pH condition (i.e., pH 7). We explored Cs+ adsorption by MXene in the presence of four different ions (NaCl, KCl, CaCl2 and MgCl2) and three different organic acids (sodium oleate, oxalic acid, and citric acid). The Cs+ removal rate changed in the presence of these components; adsorption of Cs+ by MXene thus involved ion exchange, supported by both Fourier-transform infrared spectroscopy and X-ray photoelectron spectroscopy. We confirmed that MXene was re-usable for at least four cycles. MXene is cost-effective and practical when used to adsorb radionuclides (e.g., Cs+) in nuclear wastewater.

Original languageEnglish
Pages (from-to)1201-1207
Number of pages7
JournalNuclear Engineering and Technology
Volume52
Issue number6
DOIs
StatePublished - Jun 2020

Bibliographical note

Funding Information:
This research was funded by the Korea Ministry of Environment (The SEM projects; 2018002470005 , South Korea). This research was also supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education ( NRF- 2017R1D1A1B04033506 ).

Publisher Copyright:
© 2019

Keywords

  • Adsorption
  • Mechanism
  • MXene
  • Radioactive cesium

Fingerprint

Dive into the research topics of 'Selective adsorption of Cs+ by MXene (Ti3C2Tx) from model low-level radioactive wastewater'. Together they form a unique fingerprint.

Cite this