AWWA JAW34105

The application of chlorine dioxide in water treatment has been limited because of concerns about the health effects of residual chlorite (ClO2-) and chlorate. This study investigated the feasibility of using ferrous iron (Fe[III]) to reduce chlorite concentrations. Laboratory tests indicated a required reaction stoichiometry of 3.0-3.1 mg Fe(II)/mg ClO2-. The reaction rate was rapid for pH values of 5 and greater. Interference from dissolved oxygen was minimal. The ferric hydroxide solids produced as a byproduct of the Fe(II)-ClO2- reaction had no adverse effect on alum coagulation for the removal of turbidity and dissolved organic carbon. Includes 11 references, tables, figures.

Product Details

Edition:

Vol. 84 - No. 11

Published:

11/01/1992

Number of Pages:

6

File Size:

1 file , 1.3 MB