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 language | English |
|---|---|
| Pages (from-to) | 649-652 |
| Number of pages | 4 |
| Journal | Analytical Sciences |
| Volume | 27 |
| Issue number | 6 |
| DOIs |
|
| Publication status | Published - 2011 |
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All Science Journal Classification (ASJC) codes
- Analytical Chemistry
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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, 2011, p. 649-652.Research output: Contribution to journal › Comment/debate
}
TY - JOUR
T1 - Oxidation of chromium(III) by free chlorine in tap water during the chlorination process studied by an improved solid-phase spectrometry
AU - Saputro, Sulistyo
AU - Yoshimura, Kazuhisa
AU - Takehara, Ko
AU - Matsuoka, Shiro
AU - Narsito,
PY - 2011
Y1 - 2011
N2 - 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
AB - 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
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U2 - 10.2116/analsci.27.649
DO - 10.2116/analsci.27.649
M3 - Comment/debate
VL - 27
SP - 649
EP - 652
JO - Analytical Sciences
JF - Analytical Sciences
SN - 0910-6340
IS - 6
ER -