Optimization of ultrasonic irradiation as an advanced oxidation technology

Article Abstract:

The optimization of ultrasonic irradiation as an advanced oxidation technology necessitates the adjusting of the ultrasonic frequency and saturating gas during sonolysis. Hydrogen peroxide (H2O2) and hydroxyl radical (.OH) were examined at different ultrasonic frequencies and different saturating gases to determine their sonolytic production. Results indicated that the frequency and the physicochemical properties of the saturating gases affect the sonochemical rates of production of .OH and H2O2.

All Other Basic Inorganic Chemical Manufacturing, All Other Miscellaneous Electrical Equipment and Component Manufacturing, Industrial inorganic chemicals, not elsewhere classified, X-ray apparatus and tubes, Irradiation Apparatus Manufacturing, Industrial Irradiation Equip, Hydrogen Peroxide, Ultrasonic Equipment NEC, Oxidation-reduction reaction, Oxidation-reduction reactions, Irradiation equipment, Ultrasonic equipment

---

Decomposition of parathion in aqueous solution by ultrasonic irradiation

Article Abstract:

The pesticide parathion can be used as an alternative to DDT, but the organophosphate esters degrade slowly in water. The hydrolytic half-life of parathion is 108 days at a pH of 7.4 and a temperature of 20 degrees Celsius. Ultrasonic irradiation was used to decompose parathion in aqueous solution. The results showed that ultrasonic irradiation can help to eliminate certain organic and inorganic contaminants in groundwater.

Methods, Usage, Decomposition (Chemistry)

---

Mercury-promoted hydrolysis of parathion-methyl: effect of chloride and hydrated species

Article Abstract:

Mercury salts have been found to enhance the chemical hydrolysis of organophosphate compounds (OPs), particularly parathion-methyl. The rate of OPs' hydrolysis is increased as the pH is increased and with the metal acting as a nucleophile. An increased rate in the hydrolysis of OPs can be seen with decreasing pH when the mechanism is dominated by the metal acting as an electrophile.

Primary nonferrous metals, not elsewhere classified, Primary Smelting and Refining of Nonferrous Metal (except Copper and Aluminum), Pesticide and Other Agricultural Chemical Manufacturing, Agricultural chemicals, not elsewhere classified, Mercury, Organophosphate Insecticides, Hydrolysis, Mercury (Metal), Organophosphorus compounds, Organic phosphorus compounds

Similar abstracts:

• Abstracts: Optimization of high temperature sulfur impregnation on activated carbon for permanent sequestration of elemental mercury vapors
• Abstracts: Identification of the cystic fibrosis gene: chromosome walking and jumping. Identification of the cystic fibrosis gene: cloning and characterization of complementary DNA
• Abstracts: Biomimetic extraction as a tool to identify chemicals with high bioconcentration potential. Influence of biotransformation on the relationship between bioconcentration factors and octanol-water partition coefficients
• Abstracts: Reactions of OH and NO3 radicals with phenol, cresols, and 2-nitrophenol at 296 plus or minus 2 K. Products of the gas-phase OH and NO3 radical-initiated reactions of naphthalene
• Abstracts: Cyclodextrin-enhanced biodegradation of phenanthrene. Comment on 'Field-Scale Transport of Nonpolar Organic Solutes in 3-D Heterogenous Aquifers'

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