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Adsorbent biochar derived from corn stalk core for highly efficient removal of bisphenol A

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Abstract

Environmental-friendly biochar (BC) with low cost was obtained by simple pyrolysis of corn stalk core, which was employed as an adsorbent for efficiently removing organic pollutants in water. The physicochemical properties of BCs were characterized by various techniques, including X–ray diffractometer (XRD), Fourier transforms infrared (FT-IR), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X–ray photoelectron spectrometer (XPS), Raman, Thermogravimetric (TGA), N2 adsorption–desorption and zeta potential tests. The influence of pyrolysis temperature on the structure and adsorption efficiency of the adsorbent was emphasized. The graphitization degree and sp2 carbon content of BCs were enhanced by increasing the pyrolysis temperature, which was favorable for the enhancement of the adsorption efficiency. The adsorption results showed that corn stalk core calcined at 900 °C (BC-900) displayed exceptional adsorption efficiency toward bisphenol A (BPA) in wide pH (1–13) and temperature (0–90 °C) ranges. Moreover, adsorbent BC-900 could adsorb various pollutants from water, including antibiotics, organic dyes, and phenol (50 mg·L–1). The adsorption process of BPA over BC-900 matched well with the Langmuir isotherm and pseudo-second-order kinetic model. Mechanism investigation suggested that large specific surface area and pore filling acted the foremost role in the adsorption process. Adsorbent BC-900 has the potential application in wastewater treatment due to its simple preparation, low cost, and excellent adsorption efficiency.

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The original data can be obtained from the authors upon reasonable request. And the supplementary material related to this article can be found online.

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Funding

This work was supported by the National Natural Science Foundation of China (52164024 and 22166027), the Natural Science Foundation of Inner Mongolia (2021BC05018 and 2021MS02015), and the Post-subsidy Funds for the Inner Mongolia Key Laboratory of Chemistry and Physics of Rare Earth Materials (2021PT0003).

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Libo Li: Designed the experiments, wrote the original manuscript, gave some suggestions and made deep discussion. Hongji Zhang: Gave some suggestions and made deep discussion. Zhiliang Liu: Gave some suggestions and made deep discussion. Yiguo Su: Gave some suggestions and revised the manuscript. Chunfang Du: Conceptualization, supervision, made deep discussion and revised the manuscript. All authors discussed the results and commented on the manuscript.

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Correspondence to Chunfang Du.

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Li, L., Zhang, H., Liu, Z. et al. Adsorbent biochar derived from corn stalk core for highly efficient removal of bisphenol A. Environ Sci Pollut Res 30, 74916–74927 (2023). https://doi.org/10.1007/s11356-023-27545-6

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  • DOI: https://doi.org/10.1007/s11356-023-27545-6

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