Adsorptive Removal of Trichloroethylene in Water by Crop Residue Biochars Pyrolyzed at Contrasting Temperatures: Continuous Fixed-Bed Experiments

Table 1

Proximate and ultimate analyses of soybean stover derived biochars at 300°C (BC300) and 700°C (BC700) and activated carbon (AC).

	BC300	BC700^a	AC
Proximate analysis
Yield (%)	37.03	21.59	—
Moisture (%)	4.50	0.42	7.75
Mobile matter (%)	46.34	14.66	11.70
Resident matter (%)	38.75	67.74	42.97
Ash (%)	10.41	17.18	37.57
Ultimate analysis
C (%)	68.81	81.98	87.31
H (%)	4.29	1.27	0.62
O (%)	24.99	15.45	6.65
N (%)	1.88	1.30	0.19
Molar H/C	0.74	0.19	0.085
Molar O/C	0.27	0.14	0.057
Surface area (m^2 g^−1)	5.61	420.3	758.9
Pore volume (cm^3 g^−1)	—	0.19	0.33

Data from Ahmad et al. [11].