The best optimization technology for preparation of oxytetracycline bacterial residue-activated carbon

Activated carbon was prepared from oxytetracycline bacterial residue with K₂CO₃. The effects of different factors such as activation ratio, activation temperature, activation time, on iodine adsorption, methylene blue adsorption, specific surface area and yield of activated carbon were studied. Results show the optimum conditions as follows: activation ratio of 1:3(g:g), activation temperature of 1073 K and activation time of 3 h. Under these conditions the iodine adsorption of activated carbon was 1002.96 mg/g, methylene blue adsorption was 117 mg/g,specific surface area was 1593.09 m²/g, and the yield was 20.6%. SEM and pore structure in the best conditions showed that the pore sizes were widely distributed and relatively concentrated in the surface and internal activated carbon,and they were mainly micropores and mesopores. So that greatly increased the specific surface area and adsorption characters of activated carbon.