Ferrate(VI) oxidation of thiourea
- Texas A and M Univ., Corpus Christi, TX (United States). Dept. of Chemistry
- Univ. of Miami, FL (United States). Rosenstiel School of Marine and Atmospheric Sciences
- Univ. of Texas, Austin, TX (United States). Center for Fast Kinetics Research
The rates of thiourea oxidation with Fe(VI) were determined as a function of pH and temperature. The rate law for the oxidation of thiourea was found to be [minus]d[Fe(VI)]/dt = k[sub 0][l brace][H[sup +]]/[H[sup +]]+K[sub 9][r brace][Fe(VI)][thiourea] where k[sub 0] = 5.9 [times] 10[sup 4] M[sup [minus]1] s[sup [minus]1], pK[sub 9] = 7.8. The activation energy, [Delta]E[sup [ne]], obtained was 32.2 [+-] 1.8 kJ mol[sup [minus]1]. The rate constant for the reaction of Fe(VI) with the thiourea radical was determined by using a premix pulse radiolysis technique and was found to be 8.5 [times] 10[sup 8] M[sup [minus]1] s[sup [minus]1] at pH = 9.0. The stoichiometric ratio of Fe(VI) and thiourea was found to be 1:0.38 [+-] 0.02 at pH = 9.0. Sulfate and urea were identified as the products of the reaction. Tests were conducted on the oxidative destruction of thiourea by Fe(VI) in synthetic boiler chemical cleaning wastes (BCCW) and are discussed.
- OSTI ID:
- 6447585
- Journal Information:
- Environmental Science and Technology, Journal Name: Environmental Science and Technology Vol. 33:15; ISSN ESTHAG; ISSN 0013-936X
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
320305* -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Industrial Waste Management
ANTITHYROID DRUGS
CARBONIC ACID DERIVATIVES
CHEMICAL REACTIONS
CHEMICAL WASTES
DRUGS
FERRATES
INDUSTRIAL WASTES
IRON COMPOUNDS
MANAGEMENT
NONRADIOACTIVE WASTES
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXIDATION
OXYGEN COMPOUNDS
PH VALUE
PROCESSING
TEMPERATURE DEPENDENCE
THIOUREA
THIOUREAS
TRANSITION ELEMENT COMPOUNDS
WASTE MANAGEMENT
WASTE PROCESSING
WASTES