Abstract
In the last few decades, U(VI) is a significant environmental threat. The innovative and environmentally friendly adsorbent materials for U(VI) removal were urgent. Preparation of the modified biochar from wheat straw by combined composites of MnFe2O4 nanoparticles and chitosan Schiff base (MnFe2O4@CsSB/BC) was characterized, and adsorption experiments were carried out to investigate the performance and interfacial mechanism of U(VI) removal. The results showed that MnFe2O4@CsSB/BC exhibited high adsorption capacity of U(VI) compared with BC. The adsorption process of U(VI) removal by MnFe2O4@CsSB/BC could be ascribed as pseudo-second-order model and Langmuir model. The maximum adsorption capacity of U(VI) removal by MnFe2O4@CsSB/BC reached 19.57 mg/g at pH4.0, 30 mg/L of U(VI), and 25 °C. The possible mechanism was a chemical adsorption process, and it mainly contained electrostatic attraction and surface complexation. Additionally, it also was an economic and environmental friendly adsorbent.
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This work is supported by the Natural Science Foundation of Zhejiang Province, China (LGF20C030001).
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Muqing Qiu was responsible for ensuring that the descriptions are accurate and agreed by all authors. Youdi Yuan, Haixin Xia, and Weijuan Guo wrote the original draft. Binbin Huang and Yujun Chen performed the experiments and data collection. Baowei Hu and Yuchun Wang revised the paper. Youdi Yuan, Haixin Xia, Weijuan Guo, and Binbin Huang equally contributed to this work.
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Yuan, Y., Xia, H., Guo, W. et al. The modified biochar from wheat straw by the combined composites of MnFe2O4 nanoparticles and chitosan Schiff base for enhanced removal of U(VI) ions from aqueous solutions. Environ Sci Pollut Res 30, 126045–126056 (2023). https://doi.org/10.1007/s11356-023-30961-3
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DOI: https://doi.org/10.1007/s11356-023-30961-3