Abstract:

Dataset to support the enhancement effects of cyclodextrin (CD) on the extraction of Macondo well oil (MC252) from contaminated porous media. Dataset was generated from a series of laboratory experiments using CD solutions of varying concentrations with media inoculated with MC252 oil. Samples were extracted and analyzed by GC/MS to determine the concentrations of targeted alkanes and PAHs after treatment. Mass fractions of alkanes and PAHs were also calculated, along with partitioning coefficients and extraction enhancement factors. The goal of the experiment was to assess the feasibility of using CD as a near-shore oil cleanup agent.

Suggested Citation:

Gao, Heng. 2016. Dataset for "Assessment of Cyclodextrin-Enhanced Extraction of Deepwater Horizon Oil from Contaminated Porous Media". Distributed by: GRIIDC, Harte Research Institute, Texas A&M University–Corpus Christi. doi:10.7266/N7JW8BST

Publications:

Gao, H., Miles, M. S., Meyer, B. M., Wong, R. L., & Overton, E. B. (2012). Assessment of cyclodextrin-enhanced extraction of crude oil from contaminated porous media. Journal of Environmental Monitoring, 14(8), 2164. doi:10.1039/c2em30223c

Purpose:

Laboratory testing of the enhancement effects of cyclodextrin on the extraction of oil from contaminated porous media (e.g., sand).

Data Parameters and Units:

Worksheet: Raw Results Parameter Descriptions: Absolute concentrations of alkanes and PAHs for triplicate samples of 5 concentrations of cyclodextrin solutions (0%, 2%, 5%, 10%, and 20%); Averages and standard deviations were based on triplicate samples for each cyclodextrin concentration (e.g., n=3) Worksheet: Alkanes, Aq Phase Parameter Descriptions: Absolute concentrations of alkanes (nC15-nC35) in aqueous phase for 5 concentrations of cyclodextrin treatments (0%, 2%, 5%, 10%, and 20%), expressed in parts per million or ug/ml; Extraction enhancement factor (EEF) for 5 concentrations of cyclodextrin treatments (0%, 2%, 5%, 10%, and 20%), derived by C/Co where C=concentration in pure water and Co=concentration in water with cyclodextrin Worksheet: PAHs, Aq Phase Parameter Descriptions: Absolute concentrations of PAHs in aqueous phase for 5 concentrations of cyclodextrin treatments (0%, 2%, 5%, 10%, and 20%), expressed in parts per million or ug/ml; Extraction enhancement factor (EEF) for 5 concentrations of cyclodextrin treatments (0%, 2%, 5%, 10%, and 20%), derived by C/Co where C=concentration in pure water and Co=concentration in water with cyclodextrin Worksheet: Alk & PAH, Mass Fractions Parameter Descriptions: Mass fractions of alkanes and PAHs in Aqueous and Non-Aqueous phases in 5 concentrations of cyclodextrin treatments (0%, 2%, 5%, 10%, and 20%); Mass is expressed in micrograms (ug), Fraction, % = percentage of total alkanes or PAHs in a phase based on mass Worksheet: Partitioning Coefficients Parameter Descriptions: The Partitioning Coefficient log KA-NA in for 5 concentrations of cyclodextrin solutions (0%, 2%, 5%, 10%, and 20%); KA-NA = partitioning coefficient between the aqueous phase (A) and sand, the nonaqueous phase (NA) Worksheet: Summary Parameter Descriptions: Summary of the Aqueous Concentrations of Alkanes and PAHs and Their Extraction Enhancement Factors for 5 concentrations of cyclodextrin solutions (0%, 2%, 5%, 10%, and 20%) Worksheet: Normalized EEF by Carbon Number Parameter Descriptions: Normalized Extraction Enhancement Factors by Carbon Number for 5 concentrations of cyclodextrin solutions (0%, 2%, 5%, 10%, and 20%); Normalized extraction enhancement factors are dimensionless Worksheet: Normalized EEF by PAH groups Parameter Descriptions: Normalized Extraction Enhancement Factors by PAH Group and 5 concentrations of cyclodextrin solutions (0%, 2%, 5%, 10%, and 20%); Normalized extraction enhancement factors are dimensionless

Methods:

Liquid-liquid extraction Gas chromatography/mass spectrometry

Instruments:

Agilent 7890A gas chromatograph Agilent 5975C inert XL mass selective detector

Error Analysis:

Averages and standard deviation were based on triplicate samples for all five cyclodextrin concentrations (e.g., n=3)

Individual Files: