Melamine-Sulfonic Acid Functionalized SBA-15 for Selective Adsorption of Metal Ions from Artificial Seawater and Wastewater

作者：Kim Su Yeon; Parambadath Surendran; Park Sung Soo; Ha Chang Sik^*

来源：Journal of Nanoscience and Nanotechnology, 2017, 17(10): 7565-7574.

DOI：10.1166/jnn.2017.14762

• SBA-15
• Melamine-Sulfonic Acid
• Adsorption
• Artificial Seawater
• Artificial Wastewater

The silica wall surface of SBA-15 was modified with (3-chloropropyl)triethoxysilane (ClPTES) to tailor its properties for specific applications (Cl-SBA-15) after removing the surfactant by calcination. Cl-SBA-15 was also modified using melamine (Mel-SBA-15) and chlorosulfonic acid (SUP-SBA-15) by a two-step post modification process. The physico-chemical properties of SBA-15 and the organically modified materials were characterized using a range of spectroscopic and microscopic techniques and N2 sorption experiments. SUP-SBA-15 showed excellent adsorption selectivity of 95 and 89% towards Li+ ions from artificial seawater and wastewater, respectively. Rapid adsorption equilibrium was achieved for the adsorption of Li+ ions from both artificial seawater and wastewater. In addition, the selectivity of Li+ adsorption decreased with increasing temperature. The ion-exchange mechanism played the crucial role in the selective adsorption of Li+ ions in addition to the steric hindrance, charge repulsion, and chelating structure of ligand.

• 出版日期2017-10