1. Page 847. The Table 2 should read as follows:

Sample

Heteroatom content, %

pH

Electrical conductivity, µS/cm

BC-Fe

36

6.38

6470

BC-B

49

6.33

1580

BC-Fe-Y

8

6.34

387

BC-B-Y

3

6.29

516

BC-Fe-Y-KOH1

<3

6.57

10 240

BC-Fe-Y-KOH2

<3

6.56

15 270

BC-B-Y-KOH2

<3

6.57

17 230

BC-Fe-Y-KOH2-B1

50

6.35

320

BC-Fe-Y-KOH2-B2

41

6.53

268

BC-B-Y-KOH2-B1

30

6.47

231

BC-B-Y-KOH2-B2

20

6.31

75

2. Page 853. The Fig. 11 should read as follows: