| 摘要 |
Substitution of a single Ga-atom or single Ge-atom (GaAl12 and GeAl12 respectively) into the center of an aluminum Keggin polycation (Al13) produces an optimal water-treatment product for neutralization and coagulation of anionic contaminants in water. GaAl12 consistently shows ˜1 order of magnitude increase in pathogen reduction, compared to Al13. At a concentration of 2 ppm, GaAl12 performs equivalently to 40 ppm alum, removing ˜90% of the dissolved organic material. The substituted GaAl12 product also offers extended shelf-life and consistent performance. We also synthesized a related polyaluminum chloride compound made of pre-hydrolyzed dissolved alumina clusters of [GaO4Al12(OH)24(H2O)12]7+. |
