MINIMIZING CHLORATE ION FORMATION

Authors
GORDON G ADAM L BUBNIS B
Citation
G. Gordon et al., MINIMIZING CHLORATE ION FORMATION, Journal - American Water Works Association, 87(6), 1995, pp. 97-106
Citations number
15
Categorie Soggetti
Engineering, Civil","Water Resources
Journal title
Journal - American Water Works Association → ACNP
ISSN journal
0003150X
Volume
87
Issue
6
Year of publication
1995
Pages
97 - 106
Database
ISI
SICI code
0003-150X(1995)87:6<97:MCIF>2.0.ZU;2-W
Abstract
The treatment of drinking water with either NaOCl or Ca(OCl)(2) is a s ource of chlorate ion (ClO3-) in finished water. In basic solution, li quid bleach (NaOCl) decomposition is a second-order process. The decom position of OCl- involves chlorite ion (ClO2-) as a low-concentration intermediate. The reaction of ClO2- to form ClO3- is a fast process, a nd the ClO2- in liquid bleach is at a concentration at least 200 times less than the OCl- conentration. The formation of oxygen from decompo sing OCl- is a slower side reaction (<10 percent).