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Hexavalent Chromium Removal

ARoChrome: Cr(VI) → Cr(III) solids

  • Targeting Cr6+ in water supplies

Successful Application on Hexavalent Chromium Removal – Burbank, CA

Former Aerospace Manufacturing Site with Hexavalent Chromium in Groundwater

  • ARo system installed, no post aeration and filtration steps
  • Ran 205 days on unspiked feed
  • Began Cr(VI) spike to feed, ran 248 days
  • No use of coagulant/filtration steps that could remove additional Cr(III)
  • ARo system installed, no post aeration and filtration steps
  • Ran 205 days on unspiked feed
  • Began Cr(VI) spike to feed, ran 248 days
  • No use of coagulant/filtration steps that could remove additional Cr(III)
AnalyteInletFinal Product
Nitrate-N(mgN/L)8-9<0.3
Chromium(VI)(ug/L)4-6<1
Chromium total(ug/L)4-63-4
Spiked Cr(VI)(ug/L)15-25<1
Chromium total(ug/L)15-257-12
Spiked Cr(VI)(ug/L)40-50<2
Chromium total(ug/L)40-5015-20

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