Table 19.

Concentration of chlorine dioxide and the by-product, chlorite, in 1000 mL of seawater before and after addition of 0.40 ppm chlorine dioxide. Chlorine dioxide generated using chlorine and sodium chlorite (Equation (23)). Conditions: temperature = 27 °C, pH = 7.81, conductivity = 42.4 mS/cm, turbidity = 1.93 NTU. Adapted from [369]. Used with permission of the American Water Works Association.

Compound	Before Addition	Immediately After Addition	After 30 Minutes of Agitation at 40 rpm
Chlorine (Cl2)	BDL	0.053 ppm	BDL
Chlorine dioxide (ClO2)	BDL	0.400 ppm	0.141 ppm
Chlorite (ClO2-)	BDL	0.267 ppm	1.82 ppm

BDL = below detection limits.