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10.3390/met13040677
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Article

Preparation of Porous Composite Phase Na Super Ionic Conductor Adsorbent by In Situ Process for Ultrafast and Efficient Strontium Adsorption from Wastewater

by
Yuliang Chen
1,
Xiangbiao Yin
2,
Hao Fu
1,3,
Zheyang Lin
1,
Guangcan Ma
1,
Xinpeng Wang
1,*,
Qingsong Wang
4 and
Fangqiang Chen
4,*
1
School of Resources, Environment and Materials, Guangxi University, 100 Daxue East Road, Nanning 530004, China
2
School of Nuclear Science and Technology, University of South China, 28 Changsheng West Road, Hengyang 421001, China
3
School of Chemistry & Chemical Engineering, Guangxi University, Nanning 530004, China
4
Nuclear and Radiation Safety Center, MEE, 9 East Zhixing Road, Beijing 102400, China
*
Authors to whom correspondence should be addressed.
Metals 2023, 13(4), 677; https://doi.org/10.3390/met13040677
Submission received: 8 March 2023 / Revised: 24 March 2023 / Accepted: 28 March 2023 / Published: 29 March 2023
(This article belongs to the Special Issue Separation and Recovery of Rare and Precious Metals from Secondary Resources)
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Abstract

Strontium, the main component of radioactive nuclear wastewater, is characterized by a high fission yield and an extended half-life. It is easily absorbed by the human body, thus greatly threatening the environment and the human body. In this study, a mesoporous composite phase sodium superionic conductor (NVP@NMP) was synthesized by the droplet template method, and the rapid capture of Sr2+ from wastewater was achieved by constructing a nano-heterogeneous interface to increase the ion diffusion rate. NVP@NMP showed efficient and rapid removal of strontium ions in adsorption kinetics, isothermal adsorption, solution pH, and interfering ions concentration tests, especially using the equilibrium time of 2 min for strontium absorption by NVP@NMP and a maximum theoretical adsorption capacity of 361.36 mg/g. The adsorption process was spontaneous, endothermic, and feasible. At higher concentrations of other competing ions (Na, K, Ca, Mg, and Cs), the adsorbent exhibited higher selectivity towards Sr2+.TEM, XPS, and XRD analyses revealed that ion exchange was the main mechanism for the NVP@NMP ultrafast adsorption of Sr2+. In this research, we investigated the feasibility of ultrafast strontium capture by sodium superionic conductor structured phosphates and explained the ultrafast strontium adsorption mechanism of NASICON materials through XPS.
Keywords: NASICON; ultrafast adsorption; strontium; ion exchange; wastewater NASICON; ultrafast adsorption; strontium; ion exchange; wastewater
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MDPI and ACS Style

Chen, Y.; Yin, X.; Fu, H.; Lin, Z.; Ma, G.; Wang, X.; Wang, Q.; Chen, F. Preparation of Porous Composite Phase Na Super Ionic Conductor Adsorbent by In Situ Process for Ultrafast and Efficient Strontium Adsorption from Wastewater. Metals 2023, 13, 677. https://doi.org/10.3390/met13040677

AMA Style

Chen Y, Yin X, Fu H, Lin Z, Ma G, Wang X, Wang Q, Chen F. Preparation of Porous Composite Phase Na Super Ionic Conductor Adsorbent by In Situ Process for Ultrafast and Efficient Strontium Adsorption from Wastewater. Metals. 2023; 13(4):677. https://doi.org/10.3390/met13040677

Chicago/Turabian Style

Chen, Yuliang, Xiangbiao Yin, Hao Fu, Zheyang Lin, Guangcan Ma, Xinpeng Wang, Qingsong Wang, and Fangqiang Chen. 2023. "Preparation of Porous Composite Phase Na Super Ionic Conductor Adsorbent by In Situ Process for Ultrafast and Efficient Strontium Adsorption from Wastewater" Metals 13, no. 4: 677. https://doi.org/10.3390/met13040677

APA Style

Chen, Y., Yin, X., Fu, H., Lin, Z., Ma, G., Wang, X., Wang, Q., & Chen, F. (2023). Preparation of Porous Composite Phase Na Super Ionic Conductor Adsorbent by In Situ Process for Ultrafast and Efficient Strontium Adsorption from Wastewater. Metals, 13(4), 677. https://doi.org/10.3390/met13040677

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