混酸掺杂聚吡咯/凹凸棒石复合材料对甲基橙的吸附性能

Removal of methyl orange using polypyrrple/attapulgite composites doped with mixed acids

采用原位聚合法合成了盐酸(HCl)与对甲苯磺酸(TSA)共掺杂的聚吡咯/凹凸棒石(PPy/ATP)复合材料。采用扫描电子显微镜(SEM)、傅里叶变换红外光谱(FT-IR)对复合材料的结构进行表征,发现聚吡咯微球包覆在凹凸棒石的外面,形成了粗糙的表面,其红外谱图与聚吡咯的基本一致,只是强度略有变化。考察了吸附时间、吸附剂用量、pH值和溶液初始浓度对复合材料吸附甲基橙的影响,结果表明,在45℃,溶液初始浓度为35mg/L,pH值=7,反应时间为4h,0.02g的复合材料对甲基橙的吸附效果最好;吸附过程符合准二级动力学方程和Langmuir吸附等温式,最大吸附量为143.07mg/g。

Doped with hydrochloric acid and p-toluenesulfonic acid PPy/ATP composites were prepar-ed by situ polymerization method.The structure of the composites was studied and characterized by Scanning e-lectron microscopy （SEM）and Fourier transform infrared （FT-IR）.The results indicated that the surface of ATP was covered with PPy microsphere to form a rough surface and the spectrum of PPy/ATP composites is consistent with PPy except for the intensity of some peaks.The effect of adsorption time,adsorbent dosage,pH and initial concentration was investigated.The optimum conditions were found to be：an initial concentration of 35 mg/L,contact time of 4 h,pH and temperature of 7 and 45 ℃ respectively.The experimental data fited well with the pseudo-second-order kinetic model and Langmuir equation,and the maximum adsorption capacity reached up to 143.07 mg/g.