Details

Autor(en) / Beteiligte

• Han, Bin
• Zhang, Xiaolan
• Liu, Chenglong
• Ma, Gaogao
• Guo, Dongbao
• Shao, Yongdong
• Li, Ping
• Liang, Jianjun
• Fan, Qiaohui

Titel

Essential role of the interlayer of montmorillonite, vermiculite, and illite for Ni(II) sorption

Ist Teil von

• Journal of radioanalytical and nuclear chemistry, 2023-04, Vol.332 (4), p.1315-1323

Ort / Verlag

Cham: Springer International Publishing

Erscheinungsjahr

2023

Quelle

SpringerLink

Beschreibungen/Notizen

• In this study, the essential roles of the interlayer of montmorillonite, vermiculite, and illite were explored during the sorption of Ni(II) using batch, X-ray diffraction (XRD), and surface complexation model. In the NaCl solution, the sorption of Ni(II) followed the order of montmorillonite ≈ vermiculite > illite. However, in the CsCl solution, Ni(II) sorption on montmorillonite and vermiculite became much lower. XRD patterns and the release experiments of Cs + have confirmed that the interlayer of montmorillonite partially collapsed after being equilibrated with Cs + and Na + , which is a reversible process. For vermiculite, Na + could induce a partial and reversible collapse of the interlayer; however, Cs + caused a complete and irreversible collapse. The surface complexation model showed that the ion exchange and surface complexes were the primary sorption mechanism for Ni(II) sorption on the clay minerals. The interlayer has a vital contribution to Ni(II) sorption on montmorillonite and vermiculite, especially to the ion exchange, which is very important to more accurately understand the environmental behaviors of radionuclides.