Table 2.

Model input parameters and estimates of toluene, o-xylene and PCE diffusivities in HDPE and PVC.

isotherm parameters
diffusion coefficienta
tolueneb
o-xyleneb
PCEc
tolueneo-xylenePCE
materialparticle density (g cm–3)mean particle diameter (µm)KndKndKndDDD
HDPE0.96250070.7e1.0244.11.03851.03.13 × 10–102.20 × 10–101.42 × 10–10
PVC1.41401663f0.86446340.71829510.9184.33 × 10–134.22 × 10–141.50 × 10–14
  • acm2 s−1.

  • bValues from Wu et al. (2001).

  • cValues from Wagner (2003).

  • dDimensionless Freundlich exponent.

  • eKp for HDPE (µg kg−1)(l µg−1).

  • fKf for PVC (µg kg−1)(l µg−1)n.