Mineralization toxic organic compounds

Whatever the origin of the oxygen effect, it has important practical consequences for anyone wishing to mineralize toxic organic compounds using H202/Fe++/uv. Do.9, the electrical energy dose (in... 

A large number of studies reports the use of photocatalytic reactions for the mineralization of pesticides [33], herbicides [34], toxic organic compounds [18, 35, 36], dyes [22, 37, 38], pharmaceuticals [39, 40]. 

Substances which have a deleterious effect on the taste and/or smell of the products for human consumption derived from the aquatic environment Toxic or persistent organic compounds of silicon Inorganic compounds of phosphorus and elemental phosphorus Non-persistent mineral oils and hydrocarbons of petroleum origin Cyanides, fluorides... 

During decomposition of plant remains, many phenolic compounds are released by leaching, microbial degradation or are synthesized by microbial activity. In forestry, problems of natural regeneration and reforestation are connected to the presence of phenolic substances deposited in the soil. Methods for extrachon and identification of toxic substances from different soil types (mineral or organic) are described. The method for extracting of soil phytotoxins is based on the use of ethylacetate and methanol (free phenolics) and alkaline hydrolysis (bound phenolics). 

However, the decomposition of organic compounds does not always lead to nontoxic solutions. Mineralization of melamine (2,4,6-triamino-l,3,5-triazine) and other chemicals was accomplished on Ti02 Degussa P-25. The formation of cyanuric acid prevents the complete mineralization of melamine as observed for atrazine and other. v-tria/incs on Ti02 photocatalysts, and the toxicity of the photocatalyzed solutions was higher than initially found for melamine [199],... 

In the second class, the toxic elements (Af) are combined with one or several organic radicals (such as CHj—, C Hi—, CiH j—,C Hf—) and are found linked by carbon, or by one or several atoms of hydrogen—the most simple organic radical. There are thus obtained the organic compounds, many of which (to indicate the presence of the characteristic element) merit the name organo-minerals. They respond to the general formula... 

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