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Record 1,  Textual support,  English

Record number: 1, Textual support number: 1 CONT

Oil slick dispersants. When oil ... is treated with a suitable surface active agent and agitation applied, the oil is broken up into particles ... so small that they constitute an oil-in-water emulsion ... Dispersants serve to increase the surface area of an oil spill and disperse oil globules throughout the layer volume water. This causes an accelerated degradation of oil by microbiological action.  7, record 1, English, - dispersant

Record number: 1, Textual support number: 1 OBS

The chemicals used to disperse the oil are emulsifiers. Although a chemist would never confuse the terms dispersant and emulsifier, the former designating a product which encourages the distribution of finely divided solids in a fluid, either liquid or gas, the latter referring to a product which encourages the colloidal dispersion of one liquid in another, the terms are synonymous in the field of oil pollution control. This is explained by the following sentence taken from "The Control of oil pollution on the sea and inland waters", edited by J. Wardley-Smith (source COCOB): "It was found ... [that the product] when sprayed on to the oil, effectively softened and dispersed it by means of emulsification ..." The dispersion is accomplished by products which emulsify the oil, i.e., emulsifiers. Dispersion is used in its general sense and hence dispersant simply means a product that causes spreading. Also dispersant is used more frequently than emulsifier.  8, record 1, English, - dispersant

Record 1,  Textual support,  French

Record number: 1, Textual support number: 1 DEF

Produit contenant des solvants et des tensioactifs qui, répandu sur une nappe de pétrole en mer, provoque le fractionnement de celle-ci en gouttelettes et facilite sa dispersion.  4, record 1, French, - produit%20dispersant

Record number: 1, Textual support number: 1 CONT

Produits émulsifiants ou dispersants. Ces produits [...] sont pratiquement tous des produits chimiques. Leur action [...] consiste à répartir une pollution de surface dans le volume de la mer, sous forme de fines particules. L'on espère, par ce procédé, favoriser l'action des bactéries et accélérer la biodégradation naturelle des hydrocarbures.  1, record 1, French, - produit%20dispersant

Record 1,  Textual support,  Spanish

Record number: 1, Textual support number: 1 DEF

Agente tensioactivo adicionado a un medio en suspensión para originar la separación uniforme de partículas sólidas muy finas.  2, record 1, Spanish, - dispersante

Record 2,  Textual support,  English

Record number: 2, Textual support number: 1 CONT

Low-level radioactive wastes can exist in solid liquid or gaseous form. Any solid waste may give off a radioactive gas, as in the case of Radium 226 which gives off Radon 222 when it undergoes alpha decay. Water flowing through a solid waste may leach out soluble radioactive material (e.g., the acid leachates of some uranium mine tailings). As well, solid fine particulates of radioactive waste may take the form of a dust and be carried away on the wind, as in the case in the erosion of mine tailings. Equally, non-radioactive dust particles in the atmosphere can be contaminated with radon daughters as a result of electrostatic attraction. Furthermore, fine solid or liquid radioactive wastes can also take the form of aerosols that, once airborne, may be widely scattered.  1, record 2, English, - solid%20fine%20particulates

Record 2,  Textual support,  French

Record number: 2, Textual support number: 1 OBS

Voir aussi «particule», «particules», «particules en suspension», «particules solides en suspension», «particules de poussière» et «aérosol».  1, record 2, French, - particules%20solides%20fines

Record 2,  Textual support,  Spanish