摘要
通过使用碱液对天然斜发沸石(Z)进行处理制得P型沸石(PZ),再用十六烷基三甲基溴化铵(CTMAB)对Z和PZ进行修饰,制得有机改性沸石ZC和PZC,对比考察了ZC和PZC对直链烷基苯磺酸钠(LAS)的吸附性能.实验结果表明,制得的PZ硅/铝比为2,比Z(4.85)降低58.8%;PZ的零净电荷点、比表面积、孔径和孔容均高于Z;吸附平衡时间为4 h.当p H=2时,ZC和PZC对LAS吸附量达到最高,吸附数据符合Langmuir准二级动力学方程和Langmuir等温吸附方程,饱和吸附量(qm)分别为12.658和27.100mg/g,吸附过程主要为单分子层的化学吸附,PZC的吸附速率常数大于ZC,具有更好的动力学性能.
Zeolite P（ PZ） was prepared by the natural clinoptilolite（ Z） that was treated with lye,and then Z and PZ were modified by cationic surfactant cetrimonium bromide（ CTMAB） to prepare ZC and PZC. The adsorption abilities of ZC and PZC to linear alkylbenzene sulfonate（ LAS） were studied. The results indicated that the Si / Al ratio of PZ was 2,58. 8% lower than that of Z（ 4. 85）; the point of zero net charge（ PZNC）,specific surface area,pore radius and pore volume of PZ were higher than those of Z; the adsorption equilibrium was reached after 4 h. ZC and PZC had a maximum adsorption capacity for LAS at p H = 2. The adsorption process was well fitted with pseudo-second order kinetic equation and Langmuir isothermal adsorption model.The amount of saturated adsorption of ZC and PZC are 12. 658 and 27. 100 mg / g,respectivey,showing that the adsorption process is described primarily for the monolayer and chemical adsorption,the adsorption of LAS on PZC is better than that on ZC in view of point of capacities and velocities.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2016年第1期65-72,共8页
Chemical Journal of Chinese Universities
基金
矿产资源化学四川省高校重点实验室项目(批准号:KCZ201111)资助~~
