| Patent Number |
Title Of Patent |
Date Issued |
| 6635796 |
Reduction of leachability and solubility of radionuclides and radioactive substances in contamin |
October 21, 2003 |
| A process for chemical fixation of radionuclides and radioactive compounds present in soils, solid materials, sludges and liquids. Radionuclides and other radioactive compounds are converted to low-temperature Apatite-Group structural isomorphs (general composition: (AB).sub.5 (XO.sub.4) |
| 6357969 |
Method of fabricating a groundwater monitoring system and a monitoring system formed using said |
March 19, 2002 |
| A method of fabricating a groundwater monitoring system and a monitoring system formed using said method wherein a housing containing a groundwater monitoring well is slidably attached to a sheet piling section. After the sheet piling section is inserted in the ground, the housing is wit |
| 6309337 |
Method of forming an insoluble phosphate mineral species |
October 30, 2001 |
| The present invention discloses a method of forming phosphate mineral species of the apatite family, and the mineral species thus formed, by contacting soil or solid waste material containing leachable lead with a combination of a sulfate reagent that includes one or more reactive su |
| 6291736 |
Reduction of leachability and solubility of radionuclides and radioactive substances in contamin |
September 18, 2001 |
| A process for chemical fixation of radionuclides and radioactive compounds present in soils, solid materials, sludges and liquids. Radionuclides and other radioactive compounds are converted to low-temperature Apatite-Group structural isomorphs (general composition: (AB).sub.5 (XO.sub.4) |
| 6258018 |
Fixation and stabilization of metals in contaminated soils and materials |
July 10, 2001 |
| The present invention discloses a method of treating heavy metal bearing process materials and heavy metal toxic hazardous wastes. The invention relates to treatment methods employed to chemically convert leachable heavy metals in heavy metal bearing solid and/or liquid waste materials t |
| 6139485 |
Fixation and stabilization of metals in contaminated soils and materials |
October 31, 2000 |
| The present invention discloses a method of treating lead-bearing soils, waste materials and waste material matrixes. The invention relates to treatment methods employed to chemically convert leachable lead in lead-bearing solid and/or liquid waste materials to a non-leachable form b |
| 5994608 |
Reduction of leachability and solubility of radionuclides and radioactive substances in contamin |
November 30, 1999 |
| A process for chemical fixation of radionuclides and radioactive compounds present in soils, solid materials,sludges and liquids. Radionuclides and other radioactive compounds are converted to low-temperature Apatite-Group structural isomorphs (general composition: (AB).sub.5 (XO.sub.4). |
| 5916123 |
Fixation and stabilization of metals in contaminated soils and materials |
June 29, 1999 |
| The present invention discloses a method of treating lead bearing process materials and lead toxic hazardous wastes. The invention relates to treatment methods employed to chemically convert leachable lead in lead bearing solid and liquid waste materials to a non-leachable form by mixing |
| 5732367 |
Reduction of leachability and solubility of radionuclides and radioactive substances in contamin |
March 24, 1998 |
| A process for chemical fixation of radionuclides and radioactive compounds present in soils and solid materials. Radionuclides and other radioactive compounds are converted to low-temperature Apatite-Group structural isomorphs (general composition: (AB).sub.5 (XO.sub.4).sub.3 Z), usually |
| 5569155 |
Fixation and stabilization of metals in contaminated materials |
October 29, 1996 |
| The present invention discloses a method of treating lead bearing process materials and lead toxic hazardous wastes. The invention relates to treatment methods employed to chemically convert leachable lead in lead bearing solid and liquid waste materials to a non-leachable form by mixing |
| 5527982 |
Fixation and stabilization of metals in contaminated materials |
June 18, 1996 |
| The present invention discloses a method of treating lead bearing process materials and lead toxic hazardous wastes. The invention relates to treatment methods employed to chemically convert leachable lead in lead bearing solid and liquid waste materials to a non-leachable form by mixing |
| 5397478 |
Fixation and stabilization of chromium in contaminated materials |
March 14, 1995 |
| A highly flexible multi-step treatment technology for chemical fixation and stabilization of leachable chromium, particularly hexavalent chrome, in contaminated soils, solid wastes, concrete, sludge, sand and gravel and waste waters is disclosed. The process comprises reducing hexavalent |
