Patent · US Active

Rapid sensing of toxic metals with hybrid inorganic materials

US8187890B2 · kind B2 · utility

1Cited by
1References
20Claims
0Family size

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Key dates

Filing dateJun 4, 2008
Grant dateMay 29, 2012
Priority date—
Expiry dateJun 23, 2028

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG01N33/1813
  • WIPO fieldMeasurement
  • WIPO sectorInstruments

Abstract

Methods for rapid sensing of dissolved toxic heavy metals use a hybrid inorganic material (“HIM”), which is synthesized from hydrated iron oxide (“HFO”) and calcium magnesium silicate. HIM thus synthesized is used in sensing dissolved toxic heavy metals. Water containing toxic heavy metals (e.g., lead, copper, zinc, nickel, etc.) is passed through a sorbent bed of HIM, whereupon it shows a sharp drop in pH after a certain length of time. The presence of HFO and calcium magnesium silicates in HIM synergistically provide a precipitous drop in pH, which is characteristic of the concentration and type of toxic heavy metal. Therefore, observing a change in pH indicates the presence and identity of heavy metal ions in a test water sample.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.