Figures (3)  Tables (1)

    • Figure 1. 

      FTIR spectra of the biochar-based sorbents at varying pyrolysis temperatures, and with iron fortification.

    • Figure 2. 

      Bioaccumulation factors (BAF) for PFAS analytes in radish shoot grown in contaminated soil, with and without sorbent amendments. Error bars represent the standard errors for each analyte (n = 5). Inserts represent magnifications of PFAS compounds with concentrations too low to observe in the main graph.

    • Figure 3. 

      Bioaccumulation factors (BAF) for PFAS analytes in radish bulb tissues grown in contaminated soil, with and without sorbent amendments. Error bars represent the standard errors for each treatment (n = 5). Inserts represent magnifications of PFAS compounds with concentrations too low to observe in the main graph.

    • Sorbent Element content (wt.%) BET surface area (m2/g) Pore volume (cm3/g)
      Ca K Mg P Fe CEC (cmol (+)/kg) *
      BC500 6.2 6.6 0.9 0.8 0.03 555 233 0.054
      BC700 7.1 7.3 1.1 0.9 0.03 630 19.3 0.006
      BC800 7.3 7.6 1.1 0.9 0.03 652 17.7 0.006
      FBC500 4.8 4.7 0.7 0.6 7.8 425 300 0.072
      FBC700 7.0 6.3 0.9 0.9 8.0 595 343 0.089
      FBC800 7.0 6.8 1.1 0.9 8.1 616 288 0.070
      * Reported data is mean value for n = 2.

      Table 1. 

      Elemental composition (ICP-MS), and surface properties (FTIR) measured in the biochar-sorbents