| 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+ |
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| 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: |
| 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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| 李健,李岩,牟占军,张馨颖,郝贠洪,武朝军.一种高岭土基多孔硅材料的制备及其对Ca2+和Mg2+的吸附[J].无机化学学报,2016,32(11):2049-2057. |
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