一种高岭土基多孔硅材料的制备及其对Ca2+和Mg2+的吸附
Amorphous Silica Material Prepared from Kaolin and Its Adsorption Properties to Ca2+ and Mg2+
作者单位E-mail
李健 内蒙古工业大学化工学院, 呼和浩特 010051  
李岩 内蒙古工业大学土木学院, 呼和浩特 010051  
牟占军 内蒙古工业大学化工学院, 呼和浩特 010051  
张馨颖 内蒙古工业大学化工学院, 呼和浩特 010051  
郝贠洪 内蒙古工业大学土木学院, 呼和浩特 010051  
武朝军 内蒙古工业大学化工学院, 呼和浩特 010051 nmzhjwu@163.com 
摘要: 成功合成了一种高岭土基新型多孔硅材料(ASM)并以FTIR,XRD,FE-SEM和N2吸附-脱附进行了系统的表征。ASM的制备过程涉及两步:SiO32-提取和ASM的制备。SiO32-提取的最优条件为煅烧温度为960℃,NaOH浓度为20%,反应温度为90℃,反应时间为90 min,在此条件下SiO32-提取率为60.45%(w/w)。以此提取液为原材料,调整提取液中SiO32-的浓度为12 g·L-1,反应温度为90℃,反应时间为60 min,然后再搅拌2 h可制得ASM。以此ASM对Ca2+和Mg2+进行吸附研究,脱除率分别可达94.99%和62.32%。
关键词: 多孔硅材料  制备  高岭土  吸附
基金项目: 国家自然科学基金(No.)资助项目。
Abstract: A novel amorphous silica material (ASM) was successfully prepared from kaolin and characterized by several techniques, including Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), and N2 adsorption-desorption. The preparation procedure of ASM involved two aspects: SiO32- leaching from kaolin and preparation of ASM. The optimum SiO32- leaching condition was confirmed at calcination temperature of 960℃, NaOH concentration of 20%, reaction temperature of 90℃ and reaction time of 90 min. Under this condition, SiO32- leaching yield arrived at 60.45%(w/w). The ASM was then easily prepared from SiO32- leaching at the silica concentration of 12 g·L-1, reaction temperature of 90℃, reaction time of 60 min and aging time of 2 h. The removal behavior of Ca2+ and Mg2+ revealed that the removal rate of Ca2+ and Mg2+ on the ASM could arrived at 94.99% and 62.32%, respectively.
Keywords: amorphous silica material  preparation  kaolin  adsorption
投稿时间:2016-06-05 修订日期:2016-09-20
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