剩余污泥与棉花壳制备吸附剂的研究

为了对剩余污泥和棉花壳进行资源化利用,以氯化锌为活化剂、剩余污泥和棉花壳为原料制备吸附剂,研究原料配比、热解温度、活化剂浓度、活化剂用量对制备吸附剂的影响。结果表明,剩余污泥与棉花壳质量比为1∶1、在活化温度为400℃、氯化锌的浓度为3 mol/L、原料质量与氯化锌溶液体积之比(固液比)为1∶1时,吸附剂效果最好,其碘吸附值和亚甲基蓝吸附值分别达到402.984 2、59.460 0 mg/g。通过扫描电镜、红外光谱等表征分析可知制备的吸附剂孔径丰富发达,含有C—OH、C—C、C==C、C—H官能团,具有较高的吸附能力,可以用作吸附材料。

A study of adsorbent preparation using residuaI sIudge and cotton huIIs

For the purpose of realizing the resource utilization of sludge and cotton hulls, they were used to prepare adsorbent with zinc chloride as the activator. The influences of mass ratio of raw materials, pyrolysis temperature, activator concentration, and activator dosage on adsorbent preparation were studied. The results showed that, when the mass ratio of sludge to cotton hulls was 1 ∶ 1, the pyrolysis temperature was 400 ℃, the zinc chloride concentration was 3 mol/L, the volume ratio of raw materials to zinc chloride solution(solid-liquid ratio) was1 ∶ 1, the adsorption capacity of the prepared adsorbent was the best, the iodine adsorption value and methylene blue adsorption value reached 402.984 2 and 59.460 0 mg/g respectively. Through the characterization analysis of the said adsorbent by scanning electron microscope and infrared spectroscopy, it could be found that, the adsorbent had prosperous micropore structure, contained functional groups such as C—OH, C—C, C==C, and C—H,that′s why it had a higher adsorption capacity and could be used as adsorbent.