A potentiometric study of the hydrolysis of ethylenediaminetetraacetic acid to 150{degrees}C
- Oak Ridge National Lab., TN (United States)
- CREGU, Vandoeuvre les Nancy (France)
Ethylenediaminetetraacetate anions, EDTA{sup 4-}, were titrated in a hydrogen-electrode concentration cell with an acidic titrant from 0 to 150{degrees}C at 25{degrees}C intervals. These titrations were carried out in the presence of 0. 1, 0.2, and 1.0 mol{center_dot}kg{sup -1} with the supporting electrolytes, sodium chloride, NaCl, and 1.0 mol{center_dot}kg{sup -1} tetramethylammonium trifluoromethylsulfonate, (CH{sub 3}){sub 4}N(F{sub 3}CSO{sub 3}) {l_brace}TMATFMS{r_brace} in order to assess the effect of both cation complexation by EDTA{sup 4-} and anion activity coefficient variations. The resulting hydrolysis quotients are discussed with reference to applications in boiler and heat exchanger chemical cleaning, as well as chemical and nuclear waste containment. Some recent diverse uses of this emf technique that also pertain to these applications will be mentioned briefly, e.g., surface absorption - zero-point-of-charge - measurements to high temperatures and in situ pH measurements in solubility and kinetic experiments.
- Research Organization:
- Oak Ridge National Lab., TN (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 10121819
- Report Number(s):
- CONF-9409219-8; ON: DE95007039; TRN: 95:002286
- Resource Relation:
- Conference: 12. International conference on properties of water and steam,Orlando, FL (United States),11-16 Sep 1994; Other Information: PBD: [1995]
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
42 ENGINEERING
EDTA
HYDROLYSIS
POTENTIOMETRY
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE 0273-0400 K
TEMPERATURE RANGE 0400-1000 K
BOILERS
HEAT EXCHANGERS
CLEANING
RADIOACTIVE WASTE STORAGE
PH VALUE
400400
052002
421000
ELECTROCHEMISTRY
WASTE DISPOSAL AND STORAGE
COMBUSTION SYSTEMS