【摘要】 采用水热合成法制备了三胺基改性的多孔二氧化硅(3N-SBA-15),通过IR、XRD和TEM等对其结构进行表征,对水溶液中的Pb(II)吸附条件进行优化,并对吸附热力学行为进行研究。结果表明:该材料对Pb(II)有良好的吸附行为,对Pb(II)吸附的最佳pH为4.0,平衡时间为60 min。材料对Pb(II)的吸附符合Langmuir吸附方程,饱和吸附容量为0.655 mol·g-1,是一种具有较好应用前景的Pb(II)吸附剂。更多还原

【Abstract】 Mesoporous materials 3N-SBA-15 was functionalized by a post-synthesis method, which was also characterized by IR, XRD and TEM. Adsorption of Pb(II) on 3N-SBA-15 was investigated by batch studies. The novel adsorbent exhibited high adsorption affinity for aqueous Pb(II), resulting from complexation of Pb(II) by surface cationic group. The effects of initial contact time and pH were investigated to optimize the adsorption conditions. The saturated adsorption capacity was calculated to be 0.655 mol·g-1 at pH 4.5 at room temperature. The adsorption isotherm was investigated which fitted well with the Langmuir isotherm model. And the results showed that 3N-SBA-15 as an effective adsorbent for the removal of Pb(II) in water and wastewater treatment.更多还原