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High-efficiency adsorption of Cd(II) and Co(II) by ethylenediaminetetraacetic dianhydride-modified orange peel as a novel synthesized adsorbent

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Abstract

The treatment of heavy metal (HM) wastewater is a critical and considerable challenge. Fruit peel-based HM adsorption is a promising way for the water pollution control and the reuse of agricultural waste. In this study, a novel adsorbent based on orange peel was synthesized for the first time by introducing abundant -COO groups with ethylenediaminetetraacetic dianhydride (EDTAD) to eliminate Cd(II) and Co(II) of sewage solution. The synthesized adsorbent displayed excellent adsorption capacity of 51.020 and 40.486 mg/g for Cd(II) and Co(II), respectively, and the adsorption equilibrium was achieved within 5 min, following the Langmuir isotherm model and the pseudo-second-order model. Surface characterization of adsorbents by scanning electron microscopy-energy dispersive X-ray spectroscopy, Fourier transform infrared spectroscopy, and X-ray photoelectron spectroscopy confirmed that ion exchange, complexation, and physical adsorption could occur during the adsorption process. The rapid and highly efficient adsorption performance suggests EDTAD-modified synthesized orange peel possesses great potential for HM removal from sewage systems.

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

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Acknowledgements

We gratefully acknowledge the technical supports from Instrument & Testing Center of Tianjin University of Science and Technology.

Funding

This work was supported by the National Natural Science Foundation of China (Grants 31800072, 31970084, 31400081) and the Open Fund of the Ministry of Education Key Laboratory of Molecular Microbiology and Technology, Nankai University.

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Fanghui Wang, conceptualization, investigation, data curation, and writing—original draft. Peng Wu, investigation, methodology, and writing—original draft. Lin Shu, investigation and review. Di Huang, conceptualization, supervision, and funding acquisition. Huanhuan Liu, conceptualization, supervision, writing—original draft, and funding acquisition.

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Correspondence to Di Huang or Huanhuan Liu.

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The authors declare no competing interests.

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Responsible Editor: Tito Roberto Cadaval Jr

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Wang, F., Wu, P., Shu, L. et al. High-efficiency adsorption of Cd(II) and Co(II) by ethylenediaminetetraacetic dianhydride-modified orange peel as a novel synthesized adsorbent. Environ Sci Pollut Res 29, 25748–25758 (2022). https://doi.org/10.1007/s11356-021-17501-7

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  • DOI: https://doi.org/10.1007/s11356-021-17501-7

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