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Article

“Sea Anemone”-like CeFe Oxides for High-Efficient Phosphate Removal

1
Advanced Institute of Natural Sciences, Beijing Normal University at Zhuhai, Zhuhai 519087, China
2
China Construction Third Bureau Green Industry Investment Co., Ltd., Wuhan 430074, China
*
Author to whom correspondence should be addressed.
Academic Editor: Xuliang Zhuang
Water 2022, 14(15), 2445; https://doi.org/10.3390/w14152445
Received: 30 June 2022 / Revised: 4 August 2022 / Accepted: 5 August 2022 / Published: 7 August 2022
(This article belongs to the Special Issue Carbon Neutrality and Wastewater Treatment)
The excessive release of phosphorus is a prime culprit for eutrophication and algal bloom in the aquatic environment, and there is always an urgent need to develop effective methods to deal with phosphorus pollution. Ce-based oxide is a type of compelling adsorbent for phosphate removal, and a self-templating strategy is used to construct high-performance Ce-based oxides for phosphate adsorption in this study. A “sea anemone”-like CeFe cyanometallate (CM) with a 3D microstructure is fabricated to provide a precursor for synthesizing CeFe-based oxides (CeFe-CM-T) by high-temperature pyrolysis. The as-prepared CeFe-CM-T maintains the “sea anemone” morphology well and has abundant micropores/mesopores, which render its superior phosphate adsorption capacity 1~2 orders of magnitude higher than that of the commercial CeO2 and Fe3O4 materials. Moreover, CeFe-CM-T shows high selectivity for phosphate removal when it co-exists with other anions and natural organic matter and exhibits excellent recycling performance. It demonstrates that both Ce3+ and Ce4+ are reserved in the oxides, where Ce3+ serves as the main active site for phosphate capture, which forms stable Ce-PO4 compounds via a ligand-exchange mechanism. Thus, the self-templating strategy using CM as a precursor is a potential method for synthesizing porous Ce-based oxides for phosphate removal. View Full-Text
Keywords: Ce-based oxides; self-templating strategy; cyanometallates; phosphate removal Ce-based oxides; self-templating strategy; cyanometallates; phosphate removal
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MDPI and ACS Style

Tan, X.; Dong, P.; Min, H.; Luo, J.; Huang, W.; Wang, X.; Li, Q.; Fang, Q. “Sea Anemone”-like CeFe Oxides for High-Efficient Phosphate Removal. Water 2022, 14, 2445. https://doi.org/10.3390/w14152445

AMA Style

Tan X, Dong P, Min H, Luo J, Huang W, Wang X, Li Q, Fang Q. “Sea Anemone”-like CeFe Oxides for High-Efficient Phosphate Removal. Water. 2022; 14(15):2445. https://doi.org/10.3390/w14152445

Chicago/Turabian Style

Tan, Xiaoying, Pingping Dong, Hongping Min, Jinxue Luo, Wenhai Huang, Xiaodong Wang, Qingqing Li, and Qile Fang. 2022. "“Sea Anemone”-like CeFe Oxides for High-Efficient Phosphate Removal" Water 14, no. 15: 2445. https://doi.org/10.3390/w14152445

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