Invention Grant
US07887880B2 Preparation and application of stabilized iron nanoparticles for dechlorination of chlorinated hydrocarbons in soils, sediments, and ground water 有权
稳定的铁纳米颗粒在土壤,沉积物和地下水中氯化烃脱氯的制备和应用

  • Patent Title: Preparation and application of stabilized iron nanoparticles for dechlorination of chlorinated hydrocarbons in soils, sediments, and ground water
  • Patent Title (中): 稳定的铁纳米颗粒在土壤,沉积物和地下水中氯化烃脱氯的制备和应用
  • Application No.: US11571390
    Application Date: 2005-06-30
  • Publication No.: US07887880B2
    Publication Date: 2011-02-15
  • Inventor: Dongye ZhaoFeng He
  • Applicant: Dongye ZhaoFeng He
  • Applicant Address: US AL Auburn
  • Assignee: Auburn University
  • Current Assignee: Auburn University
  • Current Assignee Address: US AL Auburn
  • Agency: Andrus, Scales, Starke & Sawall, LLP
  • International Application: PCT/US2005/023384 WO 20050630
  • International Announcement: WO2007/001309 WO 20070104
  • Main IPC: B05D7/00
  • IPC: B05D7/00 A62D3/34
Preparation and application of stabilized iron nanoparticles for dechlorination of chlorinated hydrocarbons in soils, sediments, and ground water
Abstract:
A stabilized, chemically reactive, metallic nano-material effective for degradation of chlorinated organic compounds in soils, sediments and groundwater. The nano-material is composed of a magnetic metal nanoparticle and a carbohydrate stabilizer bound to the nanoparticle. The preferred metal nanoparticle is iron and the preferred carbohydrate stabilizer is either a starch or a water soluble cellulose such as sodium carboxymethyl cellulose. The nanoparticle may be either mono-metallic, bi-metallic or multi-metallic in nature, but is preferably bi-metallic wherein it is coated with a secondary catalytic metal coating, preferably palladium. A method of making the metallic nano-material is further disclosed wherein a solution of the metal nanoparticle and carbohydrate stabilizer is prepared, and the nanoparticle is then reduced under inert conditions. A process for reductive dechlorination of chlorinated organic compounds is also disclosed wherein the reduced magnetic metal nanoparticle is prepared, and then contacted with a chlorinated organic compound to dechlorinate the compound. Preferably, the nano-material is injected into a site such as soil subsurface or groundwater contaminated with a chlorinated organic compound to provide in-situ dechlorination.
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