This research examined the removal of perchlorate from drinking and groundwater with an innovative method using titanium metal as a chemical reductant. The zero
valent titanium was induced by pitting corrosion to remove the surface oxide film by
applying electrochemical potential. Localized breakdown of the surface oxide film by the
pitting corrosion exposed the underlying bare titanium and perchlorate was reduced to
innocuous chloride by the bare titanium. The rate of perchlorate reduction was highly
dependent on the applied current. One-half of reaction time to reduce 1 mM of
perchlorate was 1.5 hrs when 200 mA of constant current was supplied during the
reaction. Mass balances revealed that oxidation was also developed on the surface oxide
film, where the pitting corrosion did not exist. The titanium system effectively destroyed
both mg/L and µg/L levels of perchlorate and achieved below 24.5 µg/L of the DWEL. Includes 15 references, table, figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 290 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 5 |
| Published : | 06/01/2006 |
