Table 2.

Sorption capacity determined after 7 and after 24 h.

	Individual Solution		Mixture 1:1
Time [h]	MO Sorption Capacity q [mg/g]	MB Sorption Capacity q [mg/g]	MO Sorption Capacity q [mg/g]	MB Sorption Capacity q [mg/g]
7	0.278 ± 0.039	--- 1	0.070 ± 0.006	0.011 ± 0.004
24	0.345 ± 0.024	0.012 ± 0.008	0.090 ± 0.003	0.004 ± 0.002

¹ Within the experimental error of the measurement, no data could be recorded due to very weak sorption capacities. Note that for the measurements of the dye mixtures (Figure 3c,d), the concentrations of both dyes had to be reduced to 12.5 mg/L each. At higher dye concentration in the mixtures, the dyes precipitate and produce a turbid liquid. In these systems, reproducible measurements are not possible. Moreover, the absorption band at 660 nm (MB) is much more intense, and higher concentrations lead to very high absorption that cannot be quantified anymore.