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

Wei Zhang, Yun-guo Liu, Xiao-fei Tan, Guang-ming Zeng, Ji-lai Gong, Cui Lai, Qiu-ya Niu and Yuan-qiang Tang
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Wei Zhang: College of Environmental Science and Engineering, Hunan University, Changsha 410082, China
Yun-guo Liu: College of Environmental Science and Engineering, Hunan University, Changsha 410082, China
Xiao-fei Tan: College of Environmental Science and Engineering, Hunan University, Changsha 410082, China
Guang-ming Zeng: College of Environmental Science and Engineering, Hunan University, Changsha 410082, China
Ji-lai Gong: College of Environmental Science and Engineering, Hunan University, Changsha 410082, China
Cui Lai: College of Environmental Science and Engineering, Hunan University, Changsha 410082, China
Qiu-ya Niu: College of Environmental Science and Engineering, Hunan University, Changsha 410082, China
Yuan-qiang Tang: College of Environmental Science and Engineering, Hunan University, Changsha 410082, China

IJERPH, 2019, vol. 16, issue 7, 1-11

Abstract: 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 NaNO 3 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.

Keywords: G-?-CD; petroleum hydrocarbon; heavy metal; desorption; simultaneous removal (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2019
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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