Volume 40 Issue 10
Oct.  2023
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ZHANG Pengli, WU Liya, YANG Zongzheng, et al. Preparation of modified MXene material and its adsorption performance for Sr2+[J]. Acta Materiae Compositae Sinica, 2023, 40(10): 5678-5691. doi: 10.13801/j.cnki.fhclxb.20221222.001
Citation: ZHANG Pengli, WU Liya, YANG Zongzheng, et al. Preparation of modified MXene material and its adsorption performance for Sr2+[J]. Acta Materiae Compositae Sinica, 2023, 40(10): 5678-5691. doi: 10.13801/j.cnki.fhclxb.20221222.001

Preparation of modified MXene material and its adsorption performance for Sr2+

doi: 10.13801/j.cnki.fhclxb.20221222.001
Funds:  The Foundation of Tianjin Key Laboratory of Brine Chemical Engineering and Resource Eco-utilization (BCERE201902); Sub Project of National Science and Technology Major Projects (2017 ZX07107-001); Scientific Research Program of Tianjin Municipal Education Commission (Natural Science) (2019 KJ225)
  • Received Date: 2022-10-21
  • Accepted Date: 2022-12-10
  • Rev Recd Date: 2022-11-29
  • Available Online: 2022-12-26
  • Publish Date: 2023-10-15
  • Ti3CNTx/TMAOH was prepared when tetramethylammonium hydroxide (TMAOH) was selected as the intercalating agent. Adsorption performance of Ti3CNTx/TMAOH on Sr2+ in simulated radioactive wastewater was evaluated. The synthesized Ti3CNTx/TMAOH was characterized by SEM-EDS, XRD, BET and FTIR. In the batch experiment, the effects of the dosage of adsorbent Ti3CNTx/TMAOH, time, pH and competitive ions on Sr2+ removal were investigated. The results show that the removal rate of Sr2+ is 99.28% when the dosage is 1.0 g·L−1, pH is 6, and the time is 10 min. The inhibition order of competitive ions is Ca2+$ \text{ > > } $Mg2+$ \text{ > } $K+$ \text{ > } $Na+$ \text{ > } $Cs+. After four adsorption-desorption cycles, the Sr2+ removal rate is 69.56%. The adsorption is consistent with the pseudo-second-order kinetic. The adsorption isotherm data conforms to the Redlich-Peterson (R-P) model. 93.80% and 68.49% Sr2+ can be removed in tap water and lake water, respectively. Sr2+ is adsorbed by Ti3CNTx/TMAOH via ion exchange, surface chelation, electrostatic adsorption and interlayer interception.


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