Chemicals as Intentional and Accidental Global Environmental by Lubomir Simeonov, Elisabeta Chirila

By Lubomir Simeonov, Elisabeta Chirila

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Additional info for Chemicals as Intentional and Accidental Global Environmental Threats (NATO Science for Peace and Security Series C: Environmental Security)

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Incidents can be sudden and acute, when hazardous chemicals are ‘overtly’ released into the environment. Incidents can also have an apparently slow onset, when there is a ‘silent’ release. The result could be substantial pollution of the immediate neighborhood, which might have health effect similar to the long-term consequences of short-term, major accidents. External factors affect the probability of an accident. In fixed installations (such as chemical plants, storage rooms, warehouses and reprocessing sites) natural events such as floods or extreme weather as well as, for example, power cuts may lead to an uncontrolled release of chemicals.

The pollutant quantity is evaluated gravimetrically and is then extracted from the filter with appropriate solvents. 4. Absorption in Liquids Absorbing components is done in a slow process, by bubbling air in a liquid, in an absorber. The shapes and dimensions of the absorbers are different, some of them being similar with the laboratory bubbling vessels. The absorbents are mixtures of solvents able to solve almost all pollutants existing in air. These liquids must have low volatility and good water, fog and aerosols retention, for example glycerin, ethylene glycol, dimethylsulfoxide or isopropanol.

1990, Sampling, Ellis Horwood London. Belardi, R. , 1989, The Application of Chemically Modified Fused Silica Fibres in Extraction of Organics from Water Matrix Samples, and their Rapid Transfer to Capillary Column, Water Pollution Research Journal of Canada, 24, 179–191. , Jin, J. , 1997, Flow- injection on-line Coprecipitationpreconcentration System Using Copper (II) diethyldithiocarbamate as Carrier for Flame Atomic Absorption Spectrometric Determination of Cadmium, Lead and Nickel in Environmental Samples, Analytica Chimica Acta, 353, 181–188.

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