2006
DOI: 10.2495/wp060201
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An improvement of Cr+6 removal by the reduction to Cr+3 in Birjand ground water treatment

Abstract: Birjand is a city in the east of Iran. Underground water is the only drinking water source, because this city is in a dry region.Ground water hexavalent chromium ion (Cr +6 ) concentration in Birjand is about 0.07 mg/l, which is higher than the maximum contamination level (MCL). The maximum contamination level of Cr +6 is 0.05 mg/l according to WHO guidelines.In an effort to comply with the World Health Organization (WHO) guideline regulations governing hexavalent chromium, Cr +6 was reduced to Cr 3 throu… Show more

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“…Voltammograms of the mixed-valence electrolyte of Cr 3+ and Cr 6+ for 1 and 10 μgL -1 are shown in Figure 12b. The Cr 6+ has a more negative potential than Cr 3+ due to its standard potential 45 and is more mobile in an aqueous solution 46 . The ions with a more negative reduction potential tend to be deposited on the electrode surface with a more positive reduction potential.…”
Section: Detection Of Cr 3+ and Cr 6+ In The Mixturementioning
confidence: 99%
“…Voltammograms of the mixed-valence electrolyte of Cr 3+ and Cr 6+ for 1 and 10 μgL -1 are shown in Figure 12b. The Cr 6+ has a more negative potential than Cr 3+ due to its standard potential 45 and is more mobile in an aqueous solution 46 . The ions with a more negative reduction potential tend to be deposited on the electrode surface with a more positive reduction potential.…”
Section: Detection Of Cr 3+ and Cr 6+ In The Mixturementioning
confidence: 99%