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Optimized Alumina Coagulants for Water Purification

Sandia National Laboratories

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Germanium-aluminum (green), all aluminum (yellow), and gallium-aluminum (pink). Bacteriophage presence in gallium-aluminum treated samples was significantly reduced.
Germanium-aluminum (green), all aluminum (yellow), and gallium-aluminum (pink). Bacteriophage presence in gallium-aluminum treated samples was significantly reduced.

Technology Marketing SummaryThis innovative technology uses a water treatment coagulant, or reagent, to facilitate the process of water purification. By inserting a single gallium atom in the center of an aluminum oxide cluster, the stability and efficacy of the reagent is greatly improved. This stability also provides a longer shelf life, increased effectiveness in various environments, and outperforms other current commercially available coagulants for water clarification and pathogen removal.DescriptionSeveral significant applications of this development exist. Since water is an essential resource for daily life, a reliable supply is a necessity. However, access to clean and safe water sources can be problematic in certain populations, areas of the world, and in emergency situations. The key benefit to this technology is the efficiency of the coagulation process as a front-end treatment means less chlorinated by-products in the potable water.Benefits
  • Greater stability of molecules
  • Longer shelf life
  • More efficient in water decontamination
  • Increased performance reduces amount of disinfection by-products
Applications and Industries
  • Water supply
  • Sewage treatment
  • Emergency usage
Patents and Patent Applications
ID Number
Title and Abstract
Primary Lab
Date
Patent 8,119,011
Patent
8,119,011
Optimized alumina coagulants for water treatment
Substitution of a single Ga-atom or single Ge-atom (GaAl.sub.12 and GeAl.sub.12 respectively) into the center of an aluminum Keggin polycation (Al.sub.13) produces an optimal water-treatment product for neutralization and coagulation of anionic contaminants in water. GaAl.sub.12 consistently shows .about.1 order of magnitude increase in pathogen reduction, compared to Al.sub.13. At a concentration of 2 ppm, GaAl.sub.12 performs equivalently to 40 ppm alum, removing .about.90% of the dissolved organic material. The substituted GaAl.sub.12 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 [GaO.sub.4Al.sub.12(OH).sub.24(H.sub.2O).sub.12].sup.7+.
Sandia National Laboratories 02/21/2012
Issued
Technology Status
Technology IDDevelopment StageAvailabilityPublishedLast Updated
SD# 11164Development - Sandia has established that key elements of the technology work together in a laboratory environment. This validation is consistent with how this development should behave in a relevant environment.Available - Various licensign and partnering options are available. Please contact the Intellectual Property department to discuss.04/08/201003/12/2013

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