K_2CO_3活化煤矸石制备活性炭吸附剂

Preparation of Active Carbon Adsorbents from Elutrilithe via K 2CO 3 Activation

用Ｋ２ＣＯ３化学活化煤矸石制备适用于废水处理的活性炭吸附剂．考察了活化条件对产物的比表面、孔体积及灰分的影响．增加了前处理和后处理步骤以改善产物的性能．最佳条件下获得的活性炭吸附剂ＢＥＴ比表面达１２３６ｍ２／ｇ，孔体积０．６７９ｃｍ３／ｇ．所制得的吸附剂表面是疏水性的，对水溶液中的酚类污染物有良好的吸附性能．

Active carbon adsorbents suitable for wastewater treatments were prepared from natural elutrilithe by chemical activation with K 2CO 3. The effect of the activation conditions on the specific area, porosity and ash content of the adsorbent was investigated. The qualities of the adsorbent are further improved via additional simple prior and post treatments. An ideal active carbon adsorbent with a BET specific area of 1236 m 2/g and a total pore volume of 0 679 cm 3/g was obtained. The adsorbents are hydrophobic in nature and exhibit large adsorption capacities for various phenolic compounds from aqueous solutions.