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Study of Cr(VI) adsorption onto nitrogen-enriched activated carbon from waste medium density fiberboard

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Abstract

Nitrogen-enriched activated carbons were prepared from waste medium density fiberboard waste by using NaOH, K2CO3 and KOH. The content of nitrogen in the activated carbon was 0.92, 0.74 and 1.33 % by analysis. The influence of contact time, pH, Cr(VI) initial concentration and the amount of activated carbon on the Cr(VI) adsorption capacity were investigated. The maximum adsorption capacity of Cr(VI) could reach 89.21 mg/g at pH 2 and a contact time of 9 h. The kinetics adsorption followed nicely the pseudo-second-order rate expression. In adsorption isotherm, the Langmuir model fitted better than the Freundlich model. Pure Poplar activated carbon was also prepared as the adsorbent for Cr(VI) removal as control sample. This study indicated that the nitrogen-enriched activated carbon prepared from waste medium density fiberboard can be used effectively for the removal of Cr(VI) compound from aqueous solutions.

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Acknowledgments

The authors are greatly indebted to the State Forestry Administration under Project 201204807: the study on the technology and mechanism of the activated carbon electrode from waste hard board and the project National Natural Science funding: the chemistry mechanism of color system forming during the process of wood heat inducing discolor (31070490).

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Correspondence to Xiao-Juan Jin.

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Yu Wu and Ji Zhang contributed equally to this work.

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Wu, Y., Zhang, J., Jin, XJ. et al. Study of Cr(VI) adsorption onto nitrogen-enriched activated carbon from waste medium density fiberboard. Wood Sci Technol 48, 713–725 (2014). https://doi.org/10.1007/s00226-014-0632-5

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  • DOI: https://doi.org/10.1007/s00226-014-0632-5

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