Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2020, Vol. 31 ›› Issue (1): 4 doi: 10.1007/s41365-019-0710-3

• NUCLEAR CHEMISTRY,RADIOCHEMISTRY,RADIOPHARMACEUTICALS AND NUCLEAR MEDICINE • Previous Articles     Next Articles

Adsorption behaviour of Eu(III) on natural bamboo fibres: Effects of pH, humic acid, contact time, and temperature

Tao Yu 1,2, Jun Yang 2, Ze-Yang Wang2   

  1. 1Engineering Research Center of Nuclear Technology Application (East China University of Technology), Ministry of Education, Nanchang 330013, China
    2School of Nuclear Science and Engineering, East China University of Technology, Nanchang 330013, China
  • Received:2019-03-06 Revised:2019-05-21 Accepted:2019-05-26
  • Contact: Tao Yu E-mail: tyu@ecit.edu.cn
  • Supported by:
    This study was supported by the National Natural Science Foundation of China (No. 21561001) and the Natural Science Foundation of Jiangxi Province, China (No. 20161BAB203100).
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Tao Yu, Jun Yang, Ze-Yang Wang. Adsorption behaviour of Eu(III) on natural bamboo fibres: Effects of pH, humic acid, contact time, and temperature.Nuclear Science and Techniques, 2020, 31(1): 4     doi: 10.1007/s41365-019-0710-3

Abstract: To study the adsorption properties of organic functional groups in plant fibres and identify a highly efficient and affordable adsorbent for radioactive wastewater treatment, natural bamboo fibre (NBF) samples were prepared, and the adsorption properties of Eu(III) on NBFs were studied under given experimental conditions. The effects of the pH, solid-to-liquid ratio, background ions, humic acid, contact time, and temperature on the adsorption behaviour of Eu(III) on NBFs were investigated. Adsorption was greatly influenced by pH, and theadsorption curves presented two inflection pointsat pH≈7 and pH≈11. Moreover, while the ionic strength presented a negative effect at pH<7, the high ionic strength favoured adsorption at pH>7. During adsorption on NBFs, the –OH,C–H, O–H, C–O, and C=O were the main adsorption groups. Hydrolysis occurring on the NBF surface caused the adsorption process to become increasingly difficult at pH>7. The maximum adsorption capacity of NBFs was 147.6 mg/g at 308 K, and the adsorption could be described using the pseudo-second-order kinetic model. The adsorption of Eu(III) on NBFs was a spontaneous and endothermic process according to the thermodynamic parameters of the process, and the adsorption thermodynamics could be well described using the Freundlich adsorption model. Therefore, NBFs were determined to be an efficient, inexpensive, and easily disposable sewage treatment material.

Key words: Adsorption, Eu(III), Natural bamboo fibre, Organic functional group