Chemical and physical properties of biochar.
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Property Range found in literature Typical value from literature1
Total phosphorus (%)
Total nitrogen (%) 1.2 - 2.4
Total potassium (%)
Total carbon (%) 56.1 - 83.9
Total hydrogen (%) 1.3 - 4.3
Total oxygen (%) 10.4 - 22.0
pH 8.2 - 10.4
Cation exchange capacity (cmol/kg) 0.3 - 68.6
Surface area (m2/g 3 - 185
Electrical conductivity (μs/cm) 100 - 2221
Pore volume (cm3/g) 0.006 - 0.110