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. Author manuscript; available in PMC: 2016 Apr 20.
Published in final edited form as: J Environ Sci Health B. 2015;50(8):544–551. doi: 10.1080/03601234.2015.1028830

Table 1.

Source material, pyrolysis temperature, moisture content, ash content, BET surface area, pH, cation exchange capacity, elemental composition, atomic ratio of biochars

Biochar EB HW TL WS WF
Source material wood and
algal digestate		 soft wood turkey litter walnut shell softwood
(Mixed Fir)*
Pyrolysis
temperature (°C)		 600-700 600-700 700-800 900 510
BET surface area
(m2 g−1)		 2.0 25.2 21.8 227.1 165.8
Ash content (%) 6.4 2.4 64.0 40.4 3.0
pH 6.8 7.5 10.9 9.7 7.3
Cation exchange
capacity (cmol g−1)		 67.0 26.2 24.4 33.4 12.0
C (wt %) 58.1 68.2 15.6 55.3 83.9
H (wt %) 4.2 3.7 0.8 0.9 1.9
H/C 0.072 0.054 0.053 0.016 0.022
*

Predominately Douglas Fir with some White Fir.