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Chen L, Jiao Z, Yin X, Li W, Wang X, Ning S, Wei Y. Highly efficient removal of strontium from contaminated wastewater by a porous zirconium phosphate material. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 319:115718. [PMID: 35868183 DOI: 10.1016/j.jenvman.2022.115718] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2022] [Revised: 07/03/2022] [Accepted: 07/08/2022] [Indexed: 06/15/2023]
Abstract
Effective and efficient disposal of radioactive pollution has been crucial for responding to unexpected nuclear accidents and guaranteeing the sustainable development of nuclear energy. In this study, a kind of porous zirconium phosphate was synthesized with a sol-gel process followed by a post-synthesis modification to remove the radioactive Sr2+ from wastewater. The prepared materials were characterized by different technologies including FT-IR, SEM-EDS, XRD and XPS, and then the adsorption performance was evaluated in batch and column modes. Experimental results suggested that the porous zirconium phosphate adsorbent was successfully prepared with Na+ dispersed in the channels for exchange. It inherited the excellent properties of zirconium dioxide aerogel and exhibited mesoporous structure and large specific surface area. Compared with traditional zirconium phosphate, the adsorption kinetics and the adsorption capacity were improved simultaneously. Especially, it showed excellent selectivity towards Sr2+ among different cations, and even could remove the low-level Sr2+ from natural seawater efficiently, which powerfully demonstrated that the prepared material could be applied in the treatment of practical wastewater. Spectra studies uncovered that the adsorption activities were dominated by the ion exchange mechanism between external Sr2+ and interlaminar Na+ or H+. In conclusion, this paper not only reports a novel synthesis strategy for the acquisition of porous zirconium phosphate, but also presents a promising adsorbent for the Sr2+ removal.
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Affiliation(s)
- Lifeng Chen
- School of Nuclear Science and Technology, University of South China, 28 Changsheng West Road, Hengyang, 421001, PR China
| | - Zihao Jiao
- School of Resources, Environment and Materials, Guangxi Key Laboratory of Processing for Non-ferrous Metallic and Featured Materials, Guangxi University, 100 Daxue Road, Nanning, 530004, PR China
| | - Xiangbiao Yin
- School of Nuclear Science and Technology, University of South China, 28 Changsheng West Road, Hengyang, 421001, PR China
| | - Wenlong Li
- School of Nuclear Science and Technology, University of South China, 28 Changsheng West Road, Hengyang, 421001, PR China
| | - Xinpeng Wang
- School of Resources, Environment and Materials, Guangxi Key Laboratory of Processing for Non-ferrous Metallic and Featured Materials, Guangxi University, 100 Daxue Road, Nanning, 530004, PR China.
| | - Shunyan Ning
- School of Nuclear Science and Technology, University of South China, 28 Changsheng West Road, Hengyang, 421001, PR China.
| | - Yuezhou Wei
- School of Nuclear Science and Technology, University of South China, 28 Changsheng West Road, Hengyang, 421001, PR China; School of Nuclear Science and Engineering, Shanghai Jiao Tong University, 800 Dong Chuan Road, Shanghai, 200240, PR China
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