2015-11-13

CAHs, as a cleaning solvent, widely contaminated shallow groundwater with the development of manufacturing in China's Yangtze River Delta. This study focused on the distribution of CAHs, and correlations between CAHs and environmental variables in a shallow groundwater in Shanghai, using kriging interpolation and multifactorial analysis. The results showed that the overall CAHs plume area (above DIV) was approximately 9,000 m2 and located in the 2–4 m underground, DNAPL was accumulated at an area of approximately 1,400 m2 and located in the 6-8m sandy silt layer on the top of the muddy silty clay. Heatmap of PPC for CAHs and environmental variables showed that the correlation between “Fe2+” and most CAHs such as “1,1,1-TCA”, “1,1-DCA”, “1,1-DCE” and “%TCA” were significantly positive (p<0.001), but “%CA” and/or “%VC” was not, and “Cl-” was significantly positive correlated with “1,1-DCA” and “1,1-DCE” (p<0.001). The PCA demonstrated that the relative proportions of CAHs in groundwater were mostly controlled by the sources and the natural attenuation. In conclusion, the combination of geographical and chemometrics was helpful to establishing an aerial perspective of CAHs and identifying reasons for the accumulation of toxic dechlorination intermediates, and could become a useful tool for characterizing contaminated sites in general.

Lu, Q, Luo, QS, Li, H, Liu, YD, Gu, JD, Lin, KF. (2015). Data from: Characterization of Chlorinated Aliphatic Hydrocarbons and Environmental Variables in a Shallow Groundwater in Shanghai Using Kriging Interpolation and Multifactorial Analysis. [Data File]. All relevant data are within the paper and its Supporting Information files. Click on “Linked Publications” to access the publication and access supporting information on figshare at https://figshare.com/articles/_Characterization_of_Chlorinated_Aliphatic_Hydrocarbons_and_Environmental_Variables_in_a_Shallow_Groundwater_in_Shanghai_Using_Kriging_Interpolation_and_Multifactorial_Analysis_/1602248

Yangtze River Delta

dce

dca

groundwater

Shallow Groundwater

pca

Kriging interpolation

tca

dnapl

CAHs plume area

silt layer

Environmental variables

Chlorinated Aliphatic Hydrocarbons

multifactorial analysis

silty clay

div

ppc

Multifactorial Analysis CAHs

vc

dechlorination intermediates