Adsorption of uranium on phosphoric acid-activated peanut shells

作者：Doudou Ma; Shuheng Hu; Yunxia Li; Zimu Xu

来源：Separation Science and Technology, 2020, 55(9): 1623-1635.

DOI：10.1080/01496395.2019.1606016

• Peanut shell
• phosphate
• PACs
• uranium (VI)
• adsorption

ABSTRACTPhosphoric acid-activated peanut shells (PS) were prepared by hydrothermal treatment at 200–800 °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 π electrons as sorption sites by surface complexation and ion exchange. Therefore, PACs as economic adsorbents could potentially remove U(VI) from aqueous solutions.

• 单位
  合肥工业大学