Kinetics and Mechanisms of the Oxidative Degradation of Nitrilotriacetic Acid (NTA) in Aqueous Solutions.

摘要

The stoichiometry of the reaction between Ce(IV) and NTA in HClO4media was determined. Degradation was rapid. The decomposition products included CO2,formaldehyde,iminodiacetic acid,glycine and an amine component. Rate of reaction measurements were made using three oxidizing agents,Ce(IV),permanganate MnO4(-) and hypochlorite (OCl(-)). The hypochlorite oxidation appears the most promising for use in both potable and waste water treatment. The work provides basic chemical data on degradation of NTA. The findings have practical application in chemical industries that use NTA as a chelating agent in the control of water pollution.