Journal
SEPARATION SCIENCE AND TECHNOLOGY
Volume 55, Issue 9, Pages 1623-1635Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/01496395.2019.1606016
Keywords
Peanut shell; phosphate; PACs; uranium (VI); adsorption
Funding
- National Natural Science Foundation of China [51807046]
- Natural Science Foundation of Anhui Province [1708085MB47]
- Foundation of Anhui Province Key Laboratory of Medical Physics and Technology [LMPT2017Y7BP0U1581]
- Specialized Research Fund for the Doctoral Program of Hefei University of Technology [JZ2017HGBZ0944]
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Phosphoric acid-activated peanut shells (PS) were prepared by hydrothermal treatment at 200-800 degrees C and denoted as peanut shell-activated carbons (PACs). The PACs were characterized as adsorbent for removing U(VI) from aqueous solutions. The U(VI) adsorption on PACs follows the pseudo-second-order kinetic equation and the Langmuir model. The adsorption capacity depends on solution pH and ionic strength and PAC-800 exhibits the highest adsorption capacity. The increasing U(VI) adsorption could be attributed to C = OOH groups and delocalized pi electrons as sorption sites by surface complexation and ion exchange. Therefore, PACs as economic adsorbents could potentially remove U(VI) from aqueous solutions.
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