Fig. 4

Observed degradation constant (\({k}_{\text{obs}}^{\text{incr}}\)) vs. pH in groundwaters. Dots represent measured data. Curves show predicted degradation rates from Ayala-Luis et al. [17] at T = 5.5, 8.0 and 10.5 °C corresponding to experimental conditions. Measurements above the line indicate faster degradation rates than expected and below the line indicate slower degradation rates than expected