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Polyethyleneimine/activated carbon paper-based material for low-concentration hexavalent chromium removal

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Abstract

Activated carbon paper-based materials were prepared from softwood pulp, activated carbon powder, and polyester fiber through wet forming process. Then polyethyleneimine was loaded on the activated carbon paper-based materials using physical impregnation method to fabricate green, low cost, and degradable PEI/activated carbon composite paper-based adsorbent materials (PPCA) for the removal of Cr(VI) from drinking water. The surface characteristics of the adsorbent were analyzed by SEM, EDX, BET, FT-IR, and XPS. It was found that the maximum adsorption capacity of Cr(VI) could reach up to 1.58 mg g−1 when the PEI immersion concentration is 1%, the contact time is 180 min, the temperature is 30 °C and pH = 2. The adsorption of Cr(VI) on PPCA conformed to both the freundlich isotherm model and the quasi-second-order kinetic model, indicating that the adsorption was multi-molecular layer adsorption controlled by chemical reaction process. The adsorption mechanism of Cr(VI) on PPCA included electrostatic attraction, redox and chelation. Overall, this study provides a green, large-scalable production way for the preparation of biodegradable adsorption materials for the efficient removal of Cr(VI) from drinking water aiding the safe management of aqueous system.

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Acknowledgments

This research was supported by the Shandong Science and Technology Program Project (2015GGX102029) and Shandong Academy of Sciences, Natural Science Foundation of Shandong Province, China (ZR2021QC158)

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Material preparation, data collection and analysis were performed by [Tianliang Gao]. The first draft of the manuscript was written by [Tianliang Gao] and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

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Correspondence to Chuanshan Zhao or Qijun Ding.

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The authors have no relevant financial or non-financial interests to disclose.

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Gao, T., Zhao, C., Wang, S. et al. Polyethyleneimine/activated carbon paper-based material for low-concentration hexavalent chromium removal. Cellulose 29, 7301–7315 (2022). https://doi.org/10.1007/s10570-022-04720-5

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  • DOI: https://doi.org/10.1007/s10570-022-04720-5

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