花生壳残渣制备活性炭及吸附性能测定

The Activated Charcoal Prepared by Peanut Shell Residual and the Determination of Adsorption Performance

用提取黄酮后废弃的花生壳做原料,选择不同的活化剂在一定温度下制备活性炭,并且测定其吸附性能。结果表明:磷酸作为活化剂时活性炭产率最高,达39.5%;当炭化温度为500℃、活化剂为氢氧化钾或磷酸、活化剂浓度为10%时,碘吸附值最高,为966.7mg/g;当炭化温度为500℃、活化剂浓度为10%时,几种活化剂制备出来的活性炭亚甲基蓝脱色力均达到40mL/g左右;与几种市售活性炭比较,花生壳活性炭碘吸附值能够满足市场需要,但是亚甲基蓝脱色力偏低;相同条件下,盐作为活化剂所制备出的活性炭对镍离子的吸附能力比较稳定。

Using the abandoned peanut shell after being extracted the flavanone as raw material, the different activators were chosen to prepare activated charcoal under certain temperature, and were determined their adsorption performances. The results indicated that the activated charcoal production rate was the highest when phosphoric acid was taken as activator, as being 39.5%. The idodine adsorption value was the highest, as being 966.7mg/g under the carbonization temperature of 500℃, the activator of the potassium hydroxide or the phosphoric acid, the activator density of 10%. The methylene blue decolorization strength of activated charcoal prepared by several kinds of activators all achieved about 40mL/g under the carbonization temperature of 500℃, the activator density of 10%. Compared with several kinds of market activated charcoals, the idodine adsorption value of the peanut shell activated charcoal could satisfy the market requirement, but the methylene blue decolorization strength was somewhat low. The nickel ion adsorptive capacity of the activated charcoal which regared salt as activator was quite stable under the same condition.