Activated carbons were manufactured from waste phenol resin in order to reuse for functional adsorbent. Waste phenol resin was carbonized with N
2 and activated with CO
2 or H
2O. The specific surface area of carbonized materials was more than 1000m
2/g, when they were carbonized at the lower temperature of 600°C for 10 minutes in N
2 and activated at 900°C for 30 minutes with H
2O. This value was nearly three times larger than that of carbonized materials activated with CO
2 in the same conditions. Moreover, waste phenol resin which was carbonized at 600°C for 10 minutes and activated at 900°C for 30 minutes with H
2O showed superior adsorption effect for NH
3 gas.
Ca(OH)
2 was added to waste phenol resin as activator. The activated reaction and adsorption effect of PO
43-, Cl
-, NO
3- and SO
42- for the activated samples in solution were evaluated. Waste phenol resin with added Ca(OH)
2 was carbonized at 800°C for 60 minutes in N
2 and activated at 1000°C with CO
2 or H
2O. The specific surface area of carbonized materials mixed with Ca(OH)
2 after activated at 1000°C for 10 minutes with H
2O was about 400m
2/g. This value was 50m
2/g lower than that of carbonized materials mixed with Ca(OH)
2 after activated in CO
2 at the same condition. Therefore, the adsorption tests for PO
43-, Cl
-, NO
3- and SO
42- contained in solution were conducted with the materials which were activated with CO
2. The results showed that the carbonized materials mixed with Ca(OH)
2 after activated in CO
2 could adsorb quickly and selectively PO
43- in solution.
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