Degradation of EDTA and DTPA in chlorine dioxide bleaching conditions.
The decomposition of EDTA and DTPA was studied in simulated chlorine dioxide bleaching conditions. Under the investigated conditions EDTA and DTPA decomposed readily. Accordingly, feeding the chelating agents to the first chlorine dioxide stages (D0) should be reconsidered, when successful metal removal is desired. On the other hand, chlorine dioxide water may be utilized to degrade the chelating agents.
Kettunen-Knuutila
A
A
Laboratory of Water Protection and Environmental Engineering, FIN-90014, University of Oulu, Finland.
Saastamoinen
S
S
Rämö
J
J
Sillanpää
M
M
Veijonen
T P
TP
Ala-Kaila
K
K
D002614:Chelating Agents / Q000737:chemistry*; D017606:Chlorine Compounds / Q000737:chemistry*; D019551:Dental Disinfectants / Q000737:chemistry*; D004492:Edetic Acid / Q000737:chemistry*; D007220:Industrial Waste; D010087:Oxides / Q000737:chemistry*; D010209:Paper; D004369:Pentetic Acid / Q000737:chemistry*; D014865:Waste Disposal, Fluid / Q000379:methods*
D002614:Chelating Agents; D017606:Chlorine Compounds; D019551:Dental Disinfectants; D007220:Industrial Waste; D010087:Oxides; D004369:Pentetic Acid; C025109:chlorine dioxide; D004492:Edetic Acid