Oxidation of chromium(III) by free chlorine in tap water during the chlorination process studied by an improved solid-phase spectrometry

Sulistyo Saputro, Kazuhisa Yoshimura, Ko Takehara, Shiro Matsuoka, Narsito

Research output: Contribution to journalComment/debate

6 Citations (Scopus)

Abstract

The oxidation of Cr(III) at naturally-occurring concentration levels, i.e., μg dm -3 or lower levels, by free chlorine during the chlorination process of tap water was studied using an improved solid-phase spectrophotometric method, which can be directly applicable to the specific determination of Cr(VI) at μg dm -3 or lower levels. The effect of the pH on the oxidation kinetics was investigated under three different pH conditions. The results showed that free chlorine oxidized the Cr(III) to Cr(VI), following the pseudo-first-order kinetics with half lifetimes of 3.0, 3.3 and 14.4 h at pH 5.0, 7.0 and 8.0, respectively, if the hypochlorite concentration was maintained at 4 mg Cl dm -3 . 2011

Original languageEnglish
Pages (from-to)649-652
Number of pages4
Journalanalytical sciences
Volume27
Issue number6
DOIs
Publication statusPublished - Jan 1 2011

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Chlorination
Chlorine
Chromium
Spectrometry
Hypochlorous Acid
Oxidation
Kinetics
Water
chromium hexavalent ion

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry

Cite this

Oxidation of chromium(III) by free chlorine in tap water during the chlorination process studied by an improved solid-phase spectrometry. / Saputro, Sulistyo; Yoshimura, Kazuhisa; Takehara, Ko; Matsuoka, Shiro; Narsito.

In: analytical sciences, Vol. 27, No. 6, 01.01.2011, p. 649-652.

Research output: Contribution to journalComment/debate

Saputro, Sulistyo ; Yoshimura, Kazuhisa ; Takehara, Ko ; Matsuoka, Shiro ; Narsito. / Oxidation of chromium(III) by free chlorine in tap water during the chlorination process studied by an improved solid-phase spectrometry. In: analytical sciences. 2011 ; Vol. 27, No. 6. pp. 649-652.
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