Fig. 1

Sorption kinetics (A,B) and isotherm (C,D) of 6PPD-quinone on crushed loose (loose particles, ∼5 cm) rubberized asphalt mixtures and compacted rubberized asphalt mixtures, respectively. RMM1, RMM2, and RMM3 represent the three different crushed loose rubberized asphalt mixtures used; Particle-Control and Column-Control indicate experiments with crushed loose asphalt mixture (RMM1) and compacted asphalt mixtures (RMM2), respectively, without spiking 6PPD-quinone. Method Control represents samples with 6PPD-quinone spiked but without crushed loose/compacted asphalt mixtures. Cs and Cw are the concentrations of 6PPD-Q in the solid and in the aqueous phase, respectively. Error bars for A represent standard deviation derived from triplicate experiments, while error bars for B represent standard deviation derived from duplicate experiments, which is too small to be visualized for most data points.