Abstract
Reed straw and electric furnace dust (EFD) waste were used to prepare magnetic Fe–C composite (EFD&C) by co-precipitation and high-temperature activation method to remove Cr(VI) from water. The magnetic EFD&C owned a large specific surface (536.61 m2/g) and a porous structure (micropores and mesopores), and had an efficient removal capacity for Cr(VI). Under conditions of pH (2), the addition amount of EFD&C (1 g/L), the adsorption time (760 min), and the temperature (45 °C), the maximum adsorption capacity reached 111.94 mg/g. The adsorption mechanism mainly attributed to chemical adsorption (redox), Cr(VI) reduced to Cr(III) by Fe(II) and Fe(0) (from Fe3O4 and Fe components in EFD) and surface functional groups of -OH, C = C, C–C and O-C = O (from biochar), and secondary attributed to physical adsorption, Cr(VI) and Cr(III) (from reduced Cr(VI)) adsorbed into the porous structure of EFD&C. This study provided a feasible solution for the preparation of adsorbents for adsorbing heavy metals from iron-containing metallurgical solid waste and biomass waste, which contributed to reducing the environmental pollution and lowering the cost of adsorbent preparation.
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The datasets used or analyzed during the current study are available from the corresponding author on reasonable request.
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Acknowledgements
The authors wish to acknowledge the financial support from National Natural Science Foundation of China (No: 52004095 and 52274333), Outstanding Youth Science Fund Project of Hebei Natural Science Foundation (E2022209019), Innovation Research Group Project of Natural Science Foundation of Hebei Province (E2022209093) and Science and Technology Project of Hebei Education Department (ZD2019001).
Funding
This work was supported by the National Natural Science Foundation of China (No: 52004095 and 52274333), Outstanding Youth Science Fund Project of Hebei Natural Science Foundation (E2022209019), Innovation Research Group Project of Natural Science Foundation of Hebei Province (E2022209093) and Science and Technology Project of Hebei Education Department (ZD2019001).
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Fu-Ping Wang: methodology, investigation, validation, writing—original draft preparation. Ya-Nan Zeng: methodology, investigation, validation, writing—original draft preparation. Yi-Tong Wang: conceptualization, methodology, validation, supervision, writing—review and editing, funding acquisition. Jun-Guo Li: writing—review and editing, funding acquisition. Xi Zhang: methodology, investigation, validation, writing—original draft preparation. Ai-Min Ji: methodology, investigation, validation, writing—original draft preparation. Qing Yu: data curation, validation. Le-Le Kang: writing—review and editing. Rui Ji: writing—review and editing. Di Gao: data curation, validation. Xiao-Man Wang: data curation, validation. Zhen Fang: conceptualization, supervision, writing—review and editing, funding acquisition.
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Highlights
• Magnetic EFD&C was prepared from reed straw and electric furnace dust waste.
• Magnetic EFD&C owned a large specific surface area (536.61 m2/g) and a porous structure.
• The maximum Cr(VI) adsorption capacity with Magnetic EFD&C was 111.94 mg/g.
• Iron components in EFD and functional groups in biochar promoted Cr(VI) removal.
• Fe3O4 and Fe in EFD contributed to easy magnetic separation (Ms of 11.35 Am2/kg).
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Wang, FP., Zeng, YN., Wang, YT. et al. Highly efficient removal of hexavalent chromium by magnetic Fe–C composite from reed straw and electric furnace dust waste. Environ Sci Pollut Res 30, 33737–33755 (2023). https://doi.org/10.1007/s11356-022-24491-7
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DOI: https://doi.org/10.1007/s11356-022-24491-7