Hydrothermal processing of chlorinated hydrocarbons in a titanium reactor

Article Abstract:

The destruction of chlorinated hydrocarbons by hydrothermal processing inside a corrosion-resistant titanium reactor at 250-500 degrees Centigrade and 30-100 s reaction time was investigated. The reaction produced high levels of hydrochloric acid (HCl), apparently due to the strength of hydrogen peroxide as an oxidizer. Similar results were obtained when nitrate and nitrite salts were used oxidizers. Carbon dioxide was the sole carbon product. There was a slight corrosion of the reactor due to the reaction product HCl, which is corrosive.

Oxidation-reduction reaction, Oxidation-reduction reactions, Hydrocracking

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Persistence of DDT and nature of bound residues in soil at higher altitude

Article Abstract:

The organochlorine insecticide, DDT, leaves bound residues in both abiotic and biotic environmental areas. These residues were examined for higher altitudes in a subtropical region to determine possible variations in persistence, metabolism and characteristics. DDT half-life in soil at higher altitudes was shorter than at lower altitudes due to soil pH level, ultraviolet radiation and rainfall differences.

Insecticides, Spraying and dusting residues in agriculture, Spraying residues (Agriculture)

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DDT, a potential source of environmental tris(4-chlorophenyl)methane and tris(4-chlorophenyl)methanol

Article Abstract:

The relationship between DDT and environmental tris(4-chlorophenyl)methane (TCPM) and tris(4-chlorophenyl)methanol is investigated using high-resolution gas chromatography and mass spectrometry. The results show that all the theoretically possible TCPM isomers can be formed by the combination of DDT with chlorobenzene under certain naturally-occurring conditions.

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