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Effective adsorption of bisphenol A from aqueous solution over a novel mesoporous carbonized material based on spent bleaching earth

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Abstract

In this study, the novel mesoporous carbonized material (HSBE/C) was prepared from clay/carbon composite (SBE/C) treated with hydrofluoric acid (HF) for the first time, and was employed to efficiently adsorb bisphenol A (BPA) in water. Specifically, SBE/C was derived from the pyrolysis of spent bleaching earth (SBE), an industrial waste. HF removed SiO2 from SBE/C and increased the specific surface area of HSBE/C (from 100.21 to 183.56 m2/g), greatly providing more adsorption sites for enhanced BPA adsorption capacity. The Langmuir monolayer maximum adsorption capacity of HSBE/C (103.32 mg/g) was much higher than the commercial activated carbon (AC) (42.53 mg/g). The adsorption process by HSBE/C followed well with the Freundlich isotherm model and the pseudo-second-order kinetic model and also was endothermic (ΔH0 > 0) and spontaneous (ΔG0 < 0). Based on the systematic characterization and factor experiment (temperature, dosage, initial pH, co-existing ions), BPA adsorption mechanism by HSBE/C likely included the hydrogen bonding, electrostatic interaction, and hydrophobic interaction. Moreover, there was no secondary pollution during the total adsorption process. Extraordinary, HSBE/C manifested stability by NaOH desorption regeneration. This study provides a new sight for application of waste-based materials as the promising adsorbents in the treatment of endocrine disruptors.

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The datasets used during the current study are available from the corresponding author on reasonable request.

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Acknowledgements

We gratefully acknowledge the School of Environmental Engineering for Henan University of Technology for the support and their assistance and all who contributed to conduction of this study.

Funding

This work was supported by the National Natural Science Foundation of China (No. 51878251), the University-Industry Cooperation Research Project in Henan Province (No. 182107000006), the Doctoral Scientific Research Start-up Foundation from Henan University of Technology (No. 2020BS005), the Excellent Youth Natural Science Foundation Project of Henan Province (No. 212300410034), and the Youth Natural Science Foundation Project of Henan Province (No. 212300410132).

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Dongjin Wan: conceptualization, methodology, resources, supervision, and data curation. Yao Chen: validation, formal analysis, visualization, and writing - original draft. Yahui Shi: writing - review and editing, and resources. Yongde Liu: conceptualization and resources. Shuhu Xiao: supervision.

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Correspondence to Yahui Shi.

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The authors declare that they have no competing interests.

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Responsible Editor: Tito Roberto Cadaval Jr

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Wan, D., Chen, Y., Shi, Y. et al. Effective adsorption of bisphenol A from aqueous solution over a novel mesoporous carbonized material based on spent bleaching earth. Environ Sci Pollut Res 28, 40035–40048 (2021). https://doi.org/10.1007/s11356-021-13596-0

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  • DOI: https://doi.org/10.1007/s11356-021-13596-0

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