Kinetics and mechanism of formation of chlorate ion from the hypochlorous acid/chlorite ion reaction at pH 6-10

Journal Article · Fri Mar 01 00:00:00 EST 1991 · Environmental Science and Technology; (USA)

DOI:https://doi.org/10.1021/es00015a014· OSTI ID:5486345

Gordon, G; Tachiyashiki, Satoshi ^[1]

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1. Miami Univ., Oxford (USA)

The reaction between free chlorine (HOCl/OCl{sup {minus}}) and chlorite ion (ClO{sub 2}{sup {minus}}) has been studied in the pH 6.4-10.0 region. The reaction proceeds through the Cl{sub 2}O{sub 2} intermediate followed by a direct reaction of the intermediate with hypochlorous acid to form chlorate ion. Time-concentration profiles were measured for each chlorine species, resulting in both total chlorine and redox balance. Negligibly small amounts of chlorine dioxide are formed above pH 7. Indirect evidence suggests that, in this pH region, the formation of any chlorine dioxide is primarily due to the presence of concentration gradients or because of the adventitious presence of catalytic metal ion impurities. Details of the overall reaction mechanism for the formation of chlorate ion are presented.

• OSTI ID: 5486345
• Journal Information: Environmental Science and Technology; (USA), Vol. 25:3; ISSN 0013-936X
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
CHLORATES
CHEMICAL REACTION KINETICS
CHLORINE
DATA ANALYSIS
EXPERIMENTAL DATA
HYPOCHLOROUS ACID
MEASURING METHODS
PH VALUE
CHLORINE COMPOUNDS
DATA
ELEMENTS
HALOGEN COMPOUNDS
HALOGENS
HYDROGEN COMPOUNDS
INFORMATION
INORGANIC ACIDS
KINETICS
NONMETALS
NUMERICAL DATA
OXYGEN COMPOUNDS
REACTION KINETICS
400201* - Chemical & Physicochemical Properties