Development of Functional Adsorbent from Waste Phenol Resin

Activated carbons were manufactured from waste phenol resin in order to reuse for functional adsorbent. Waste phenol resin was carbonized with N2 and activated with CO2 or H2O. The specific surface area of carbonized materials was more than 1000m2/g, when they were carbonized at the lower temperature of 600°C for 10 minutes in N2 and activated at 900°C for 30 minutes with H2O. This value was nearly three times larger than that of carbonized materials activated with CO2 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 H2O showed superior adsorption effect for NH3 gas.Ca(OH)2 was added to waste phenol resin as activator. The activated reaction and adsorption effect of PO43-, Cl-, NO3- and SO42- 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 N2 and activated at 1000°C with CO2 or H2O. The specific surface area of carbonized materials mixed with Ca(OH)2 after activated at 1000°C for 10 minutes with H2O was about 400m2/g. This value was 50m2/g lower than that of carbonized materials mixed with Ca(OH)2 after activated in CO2 at the same condition. Therefore, the adsorption tests for PO43-, Cl-, NO3- and SO42- contained in solution were conducted with the materials which were activated with CO2. The results showed that the carbonized materials mixed with Ca(OH)2 after activated in CO2 could adsorb quickly and selectively PO43- in solution.