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. Author manuscript; available in PMC: 2017 Apr 5.
Published in final edited form as: Environ Sci Technol. 2016 Mar 11;50(7):3838–3845. doi: 10.1021/acs.est.5b05243

Figure 3.

Figure 3

Effect of Brij 30, POESH, and Span 20 on residual 4- and 5-ring PAHs from bioreactor-treated soil after 16 days. Abbreviations are defined in Table S2. Bars represent means and standard deviations of five replicates. Asterisks indicate PAHs designated by EPA as probable human carcinogens. PAHs for which there were no significant differences between no-surfactant controls and all surfactant-amended samples are not shown. †BeP was measured by GC-MS and not measured for Brij 30 higher or POESH lower. Other notes as in Figure 2.