carbon Surface pH pH zpc Carboxyl (m.eq/g) Lactonic (m.eq/g) Phenolic (m.eq/g) Carbonyl (m.eq/g) Total (m.eq/g)
C 8.5 5.4 0.21 0.20 0.18 0.24 0.83
C1 5.2 4.4 1.00 0.89 1.02 1.55 4.45
C2 7.6 5.1 0.48 0.44 0.64 0.69 2.25
Table 2: Surface chemical parameters of the investigated carbons.