An organic/inorganic hybrid gel was prepared with tetraethoxysilane (TEOS) and bis(trimethoxysilylpropyl)amine (TSPA) as precursors. The adsorption of boron on the hybrid gel in aqueous solutions was investigated comprehensively by varying the initial boron concentration, pH, ionic strength, and temperature. The equilibrium adsorption amount of boron increases with the increase in initial boron concentration and ionic strength, but decreases with the increase in temperature. The adsorption amount exhibits a maximum at initial pH of 4-10. Boron appears to be adsorbed in both H3BO3 and B(OH)4- forms through the hydrogen bonding, electrostatic and hydrophobic attractions.
Bibliographical noteFunding Information:
ZW acknowledges the financial support by the foundation of Knowledge Innovation Program of Chinese Academy of Sciences (kzcx2-yw-115), and Hundred Talent Program of Chinese Academy of Sciences (0660011106). KL acknowledges the financial support by the KOSEF through the Grant No. M10755020001-08N5502-00110 and the National Core Research Center for Nanomedical Technology (R15-2004-024-00000-0).
All Science Journal Classification (ASJC) codes
- General Materials Science
- General Physics and Astronomy