Fe(NO_(3))_(3)活化制备棉经纬纶废料介孔炭及其吸附Cr(VI)研究

Preparation of mesoporous carbon from cotton textile waste by Fe(NO_(3))_(3) activation and its adsorption on Cr(VI)

以棉经纬纶废料为原料,利用Fe(NO_(3))_(3)为活化剂制备介孔炭。通过单因素实验考察Fe(NO3)3和棉经纬纶废料质量比、活化温度和活化时间对介孔炭碘值和得率的影响,得出其最佳制备工艺条件为:质量比为0.5∶1、活化温度为700°C、活化时间为0.5 h,制得的介孔炭碘值和得率分别为409.78 mg·g^(-1)和13.72%,比表面积为382.95 m^(2)·g^(-1),介孔比表面积和介孔容积分别为335.16 m^(2)·g^(-1)和0.79 cm^(3)·g^(-1)。介孔炭对Cr(VI)的吸附量随pH增加而减小,最大吸附量为46.03 mg·g^(-1),吸附行为符合Langmuir模型,为单分子层吸附。

Mesoporous carbon derived from cotton textile waste was prepared by Fe(NO3)3 activation.The effect of mass ratio of waste to Fe(NO_(3))_(3) solution,activation temperature and activation time on the iodine value and yield of mesoporous carbon was investigated by single factor experiments.The optimal preparation conditions were as follows:mass ratio of 0.5∶1,activation temperature of 700°C,activation time of 0.5 h.The iodine value and yield of mesoporous carbon obtained under the optimal conditions were 409.78 mg·g^(-1) and 13.72%,respectively.The specific surface area was 382.95 m^(2)·g^(-1).And the mesopore area and mesopore volume were 335.16 m^(2)·g^(-1) and 0.79 cm3·g^(-1),respectively.Its adsorption capacity on Cr(VI)decreased with the increase of pH.The maximum adsorption amount was 46.03 mg·g^(-1).The adsorption behavior was consistent with the Langmuir model,which was monolayer adsorption.