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Minimizing chlorate ion formation
Author(s) -
Gordon Gilbert,
Adam Luke,
Bubnis Bernard
Publication year - 1995
Publication title -
journal ‐ american water works association
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.466
H-Index - 74
eISSN - 1551-8833
pISSN - 0003-150X
DOI - 10.1002/j.1551-8833.1995.tb06382.x
Subject(s) - chlorate , bleach , chemistry , decomposition , chloramine , chloramination , inorganic chemistry , water treatment , hypochlorite , environmental chemistry , chlorine , environmental engineering , organic chemistry , environmental science
Storage tanks that contain liquod bleach should be periodically flushed and cleaned to minimize buildup of a residual chlorate ion concentration. The treatment of drinking water with either NaOCl or Ca(OCl) 2 is a source of chlorate ion (ClO 3 − ) in finished water. In basic solution, liquid bleach (NaOCl) decomposition is a second‐order process. The decomposition of OCl − involves chlorite ion (ClO 2 − ) as a low‐concentration intermediate. The reaction of ClO 2 − to form ClO 3 − is a fast process, and the ClO 2 − in liquid bleach is at a concentration at least 200 times less than the OCl − concentration. The formation of oxygen from decomposing OCl − is a slower side reaction (<10 percent).