磷酸活化纺织固体废弃物制备活性炭及表征

Textile Waste Recycled to Prepare Activated Carbon by Phosphoric Acid Activation

以纺织固体废弃物为原料,磷酸为活化剂,采用一步活化法制备活性炭。采用正交实验研究了磷酸浓度、浸渍时间、活化温度和活化时间对活性炭吸附性能的影响,得到最佳工艺条件,借助氮吸附等温线、BET方程、BJH方程、SEM和FTIR分析了活性炭孔结构和表面化学性质。结果表明:最佳工艺条件为磷酸浓度40%(质量分数)、浸渍时间24h、活化温度500℃、活化时间30min。最佳条件下活性炭碘值为967mg/g,亚甲基蓝值为112mL/g,BET比表面积为1107.51m2/g,总孔容积为1.239cm3/g,中孔容积为1.024cm3/g,中孔占82.65%。活性炭表面具有羟基、羰基、内酯基和多种含磷官能团。

This paper reports an experiment to study the properties of activated carbon prepared from the waste of textile factories using the one-step activation process with phosphoric acid as an activating agent.To work out the optimum condition for this preparation,orthogonal experiments were conducted,and activated carbon s pore structure and surface chemistry characterized by means of adsorption isotherms,BET equations,BJH equation,with the analysis of SEM and FTIR.The FTIR spectra suggest that surface functiona...