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Journal of Wood Science

Official Journal of the Japan Wood Research Society

Table 3 Yield, iodine value, methylene blue adsorption value, and K ions content of ACs prepared under various conditions

From: Japanese cedar (Cryptomeria japonica) ash as a natural activating agent for preparing activated carbon

Sample identification code

Yield (%)

Iodine value (mg/g)

MB3 (mg/g)

K ions4 (wt%)

0-750-1.01

25.4 (0.6)a 2

203.0 (8.0)b

2.3 (0.8)b

0.40 (0.03)a

0-850-1.0

25.1 (0.8)a

337.0 (25.0)c

13.5 (0.9)c

0.88 (0.04)b

0-950-1.0

25.7 (0.2)a

156.0 (7.0)a

0.6 (0.4)a

1.74 (0.02)c

JC-0.33-750-1.0

30.7 (1.1)

953.5 (3.9)

836.9 (18.9)

12.87 (0.09)

JC-0.20-850-1.0

27.3 (0.7)

1055.9 (37.5)

695.1 (28.2)

11.45 (0.09)

JC-0.25-850-1.0

28.4 (0.9)

1097.4 (16.3)

1012.1 (32.1)

12.45 (0.13)

JC-0.33-850-0.5

30.4 (0.7)

1150.9 (7.8)

1010.6 (44.6)

13.10 (0.21)

JC-0.33-850-1.0

29.1 (0.6)

1106.4 (12.9)

1108.0 (20.4)

12.60 (0.20)

JC-0.33-850-1.5

28.3 (0.5)

1093.8 (3.3)

1023.5 (33.9)

11.65 (0.14)

JC-0.33-950-1.0

28.0 (0.2)

1121.4 (15.4)

1368.0 (30.3)

6.10 (0.12)

  1. 1Sample identification code: ash (JC)–ash to water ratio–activation temperature–activation duration
  2. 2Mean (standard deviation) separation within columns by Duncan’s multiple range tests at a 5 % significance level for yield, iodine value, MB, and K ions. Repeated letters indicate no significant differences between two variable factors, whereas significant differences are expressed by the use of different letters (a–c)
  3. 3MB: methylene blue adsorption value
  4. 4K ions: samples without acid washing were measured using XRF
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