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Enhanced arsenite removal in aqueous with Fe-Ce-Cu ternary oxide nanoparticle

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Abstract

Arsenite is both more harmful and challenging to get out of water than arsenate. For enhanced As (III) removal, a ternary oxide nanoparticle (FCCTO) mainly composed of iron(Fe), with a small proportion of cerium(Ce) and copper(Cu) was created using a coprecipitation–calcination process. FCCTO was found to be effective in removing As (III) from water, with factors such as adsorbent dose, pH, temperature, and coexisting anions influencing its efficiency. The surface area of FCCTO reached 180.2 m2/g and the doping significantly increased its pore volume and diameter. The adsorption process on FCCTO was endothermic and spontaneous. Ce and Cu in FCCTO were able to efficiently oxidize 81.3% As (III) to As(V). Abundant sites were provided by surface hydroxyl groups for arsenic adsorption. The maximal As(III) adsorption capacity of this adsorbent under the synergistic impact of oxidation and adsorption was 101.5 mg/g. After five cycles, the FCCTO’s As(III) adsorption rate dropped to 60% as a result of tetravalent Ce consumption. Surface complexation, redox, and adsorption all had a significant impact on the adsorption process. Overall, FCCTO was an excellent adsorbent with benefits of being facile fabrication, environmentally, recyclable, and having a high As(III) adsorption capacity.

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The data analyzed in this study are available from the corresponding author on reasonable request.

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Funding

We acknowledge the key Research and Development Projects of Hunan Province (No. 2019WK2031) for financial support of this research.

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Ying Liu: conceptualization, methodology, data analysis, writing—review and editing, visualization, and validation. Leyi Li: methodology, data collection, review and editing. Xuemei Huang: review and editing. Yaochi Liu: supervision, review and editing, visualization, and validation.

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Correspondence to Yaochi Liu.

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The authors declare no competing interests.

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Responsible Editor: Ioannis A. Katsoyiannis

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Liu, Y., Li, L., Huang, X. et al. Enhanced arsenite removal in aqueous with Fe-Ce-Cu ternary oxide nanoparticle. Environ Sci Pollut Res 30, 95493–95506 (2023). https://doi.org/10.1007/s11356-023-29082-8

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  • DOI: https://doi.org/10.1007/s11356-023-29082-8

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