Abstract
Acidified hydrazine hydrate was used to remediate Cr(VI)-contaminated soil. The content of water-soluble Cr(VI) in contaminated soil was 4977.53 mg/kg. The optimal initial pH of hydrazine hydrate solution, soil to solution ratio and molar ratio of Cr(VI) to hydrazine hydrate for remediation of Cr(VI)-contaminated soil were 5.0, 3:1 and 1:3, respectively. Over 99.50 % of water-soluble Cr(VI) in the contaminated soil was reduced at the optimal condition within 30 min. The remediated soil can keep stable within 4 months. Meanwhile the total phosphorus increased from 0.47 to 4.29 g/kg, indicating that using of acidified hydrazine hydrate is an effective method to remediate Cr(VI)-contaminated soil.
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Acknowledgments
This work was supported by a grant from the National Natural Science Foundation of China (41430637); Program for Innovative Research Team (in Science and Technology) in University of Henan Province (16IRTSTHN012); Research Fund Project of Henan University.
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Ma, Y., Li, F., Jiang, Y. et al. Remediation of Cr(VI)-Contaminated Soil Using the Acidified Hydrazine Hydrate. Bull Environ Contam Toxicol 97, 392–394 (2016). https://doi.org/10.1007/s00128-016-1862-z
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DOI: https://doi.org/10.1007/s00128-016-1862-z