Table 2 HT, FWE, MAE, and TE depending on the life cycle inputs to produce 1 ton of biochar.

From: Evaluating biochar extraction from waste tree stumps in different pyrolysis systems using life cycle analysis

Impact category

Unit

Total

FPP

BPR

MPR

MPT

FT

TS

SBP

MTP

EP

SC–1

Human toxicity

kg 1,4-DBeq

204.81

4.03

0.93

5.50

2.29

8.47

0.15

134.47

8.43

40.53

Freshwater aquatic ecotoxicity

185.83

3.10

0.48

8.50

3.54

3.63

0.01

112.96

13.04

40.57

Marine aquatic ecotoxicity

51.22 · 10 4

6,398.18

4,956.39

10,541.65

4,392.36

9,994.76

34.44

347,097.03

16,160.38

11,2611.42

Terrestrial ecotoxicity

1.14

0.016

0.001

0.002

0.001

0.038

0.001

0.96

0.004

0.108

SC–2

Human toxicity

kg 1,4-DBeq

184.81

3.68

0.43

3.52

1.47

7.75

0.13

123.03

7.71

37.08

Freshwater aquatic ecotoxicity

166.49

2.84

0.22

5.45

2.27

3.32

0.008

103.35

11.93

37.12

Marine aquatic ecotoxicity

46.22 · 10 4

5,853.78

2,267.33

6,751.28

2,813.03

9,144.34

31.51

317,563.61

14,785.34

103,029.65

Terrestrial ecotoxicity

1.04

0.015

0.00063

0.0016

0.00067

0.034

0.0011

0.88

0.0035

0.20

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