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Enhancement of Detoxification of Petroleum Hydrocarbons and Heavy Metals in Oil-Contaminated Soil by Using Glycine-β-Cyclodextrin

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College of Environmental Science and Engineering, Hunan University, Changsha 410082, China
2
Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China
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Authors to whom correspondence should be addressed.
Int. J. Environ. Res. Public Health 2019, 16(7), 1155; https://doi.org/10.3390/ijerph16071155
Received: 22 January 2019 / Revised: 23 March 2019 / Accepted: 27 March 2019 / Published: 31 March 2019
Soil contamination with petroleum hydrocarbons and heavy metals is a widespread environmental problem. In recent years, cyclodextrin has attracted research interest because of its special hole structure that can form inclusion complexes with certain small molecules. However, the solubility of β-cyclodextrin (β-CD) in water is low and it crystallizes easily, leading to its low utilization in practice. In this experiment, we connected β-CD with glycine under alkaline conditions to prepare glycine-β-cyclodextrin (G-β-CD), which is water soluble, has stronger coordinating ability with heavy metals, and is more suitable for treating oil-contaminated soil. The results show that G-β-CD provides better desorption of petroleum hydrocarbons and heavy metals in soils with low organic matter content (1%) and NaNO3 of 0.25 mol/L at 70 g/L G-β-CD under mildly acidic (pH 5–6) conditions. The results indicate that petroleum hydrocarbons and heavy metals were removed simultaneously by means of pretreatment with G-β-CD, and the results can provide a theoretical basis for remediation of petroleum-contaminated soil. View Full-Text
Keywords: G-β-CD; petroleum hydrocarbon; heavy metal; desorption; simultaneous removal G-β-CD; petroleum hydrocarbon; heavy metal; desorption; simultaneous removal
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Zhang, W.; Liu, Y.-G.; Tan, X.-F.; Zeng, G.-M.; Gong, J.-L.; Lai, C.; Niu, Q.-Y.; Tang, Y.-Q. Enhancement of Detoxification of Petroleum Hydrocarbons and Heavy Metals in Oil-Contaminated Soil by Using Glycine-β-Cyclodextrin. Int. J. Environ. Res. Public Health 2019, 16, 1155.

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