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A co-precipitation route for the preparation of eco-friendly Cu-Al-layered double hydroxides with efficient tetracycline degradation

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Abstract

The construction of novel efficient catalysts for the treatment of organic pollutants in the aqueous environment is essential. The lamellar-like Cu-Al layered double hydroxides (CuAl-LDHs) with various mole ratios were synthesized by a simple route of co-precipitation, and the corresponding degradation characteristic was tested for the removal of tetracycline (TC) using PMS activation. The degradation efficiency of TC over CuAl-LDHs increased up to 93% within 10 min for the Cu/Al mole ratio of 3:1 and almost not changed at a higher mole ratio. For further calcining the optimal catalyst at 300 ℃, the degradation efficiency of TC was found to be increased to 96%. Sulfuric radicals and singlet oxygen were analyzed to be the main reason for the change in degradation characteristics, which was proved by radical quenching experiments and electron paramagnetic resonance technique. The parameters including PMS concentration, catalyst dosage, and reaction temperature on the TC degradation as well as the degradation mechanism for PMS activation were elaborated. The best proportion of CuAl-LDHs owned splendid stability and catalytic activity after reusing, which showed enormous potential in practical application.

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Funding

This work is supported by the National Natural Science Foundation of China (Grant Nos. 22078124, 21878119), Program for the Development of Science and Technology of Jilin Province (20210203014SF).

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Authors and Affiliations

  1. Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Siping, 136000, People’s Republic of China

    Si Wu, Huicong Liang, Bingyan Xu, Qi Zhang, Hougang Fan, Jingshu Wang, Qiang Han, Ming Gao, Jinghai Yang & Jihui Lang

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  1. Si Wu
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  2. Huicong Liang
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  3. Bingyan Xu
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  4. Qi Zhang
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  7. Qiang Han
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  8. Ming Gao
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  9. Jinghai Yang
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  10. Jihui Lang
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Contributions

Si Wu: conceptualization, methodology, data curation, investigation, writing—original Draft; Huicong Liang: software, formal analysis; Bingyan Xu: formal analysis, investigation; Qi Zhang: formal analysis, data curation; Hougang Fan: validation, investigation; Jingshu Wang: visualization, supervision; Qiang Han: validation, investigation; Ming Gao: writing—review & editing; Jinghai Yang: funding acquisition, project administration; Jihui Lang: funding acquisition, resources, writing—review & editing.

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Correspondence to Jihui Lang.

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Wu, S., Liang, H., Xu, B. et al. A co-precipitation route for the preparation of eco-friendly Cu-Al-layered double hydroxides with efficient tetracycline degradation. Environ Sci Pollut Res 30, 99412–99426 (2023). https://doi.org/10.1007/s11356-023-29345-4

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