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Table 1 Summary data for pH, CEC (cmol/kg), methylene blue adsorption (milligram dye adsorbed/gram biochar), and field capacity measurements (g H2O/g biochar)

From: Surface oxygenation of biochar through ozonization for dramatically enhancing cation exchange capacity

Sample pH CEC (cmol/kg) Methylene blue adsorption (mg/g) Field capacity (g H2O/g biochar)
Untreated 7.30 ± 0.39 15.39 ± 1.59 1.79 ± 0.18 4.88 ± 0.02
30 min O3 5.46 ± 0.40 30.26 ± 3.23 9.22 ± 0.18 3.63 ± 0.02
60 min O3 5.33 ± 0.28 31.03 ± 2.44 9.45 ± 0.07 2.92 ± 0.21
90 min O3 5.28 ± 0.33 32.69 ± 2.51 9.35 ± 0.04 3.38 ± 0.08
Soil ref. N/A 12.75 ± 1.01 N/A 2.03 ± 0.40