Kinetics and mechanism of the enhanced reductive degradation of CCl4 by elemental iron in the presence of ultrasound

Article Abstract:

Ultrasonic irradiation has been found to degrade aqueous organic compounds through hydroxyl radical oxidation, pyrolytic degradation, and supercritical water reactions. The degradation of carbon tetrachloride has been shown to be increased 40 times using a combination of elemental iron and ultrasound due to acoustic cavitation. The increase in degradation can be explained by greater mass transport levels of reactants to iron and the chemical reaction of iron due to cavitation.

Carbon Tetrachloride, Ultrasonics, Iron, Iron (Metal)

---

Kinetics and mechanism of the sonolytic destruction of methyl tert-butyl ether by ultrasonic irradiation in the presence of ozone

Article Abstract:

Sonolysis of methyl tert-butyl ether (MTBE) has been found to be greatly accelerated by the presence of ozone. Experiments were conducted on MTBE sonolysis using an ultrasonic frequency of 205 kHz and a power of 200 W with results showing first-order MTBE degradation rates increasing as MTBE concentrations decrease. Ozone enhancements in sonolysis ranged between 1.5 and 3.9 depending on MTBE initial concentrations.

Waste Management and Remediation Services, Water Pollution Control R&D, Industrial Water Pollution, Analysis, Environmental aspects, Waste management, MTBE, Air pollution, Ozone, Water pollution research, Decomposition (Chemistry), Methyl tertiary butyl ether

---

Novel photocatalytic mechanisms for CHCl3, CHBr3, CCl3CO2- degradation and the fate of photogenerated trihalomethyl radicals on TiO2

Article Abstract:

The research examines the degradation of halogenated organic compounds. Halogenated organic compounds are chemical contaminants found in a wide range of environments that poses toxic dangers to humans. The photocatalytic degradation of the halogenated organic compounds CHCl3, CHBr3, CCl4, and CCl3CO2- are examined in aqueous TiO2 suspensions, using the trihalomethyl radical as an intermediate except for CCl3CO2-.

Pollution R&D NEC, Misc Organic Chemicals, Biodegradation, Organic compounds, Pollution control research, Halogens, Halogen elements

Similar abstracts:

• Abstracts: A different mechanism for the reductive dechlorination of chlorinated ethenes: kinetic and spectroscopic evidence
• Abstracts: Kinetics of the reduction of hexachloroethane by juglone in solutions containing hydrogen sulfide. Iron porphyrin and mercaptojuglone mediated reduction of polyhalogenated methanes and ethanes in homogeneous aqueous solution
• Abstracts: Role of chlorine and oxygen in the photocatalytic degradation of trichloroethylene vapor on TiO2 films. Surfactant foam/bioaugmentation technology for in situ treatment of TCE-DNAPLs
• Abstracts: Estimating field hydraulic conductivity of compacted clay. Laboratory modeling of laterally-loaded drilled shafts in clay
• Abstracts: Chemical dynamics of persistent organic pollutants: a sensitivity analysis relating soil concentration levels to atmospheric emissions

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.