By Łucjan Pawłowski, Alain J. Verdier, Federation of European Chemical Societies
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Additional info for Chemistry for protection of the environment: proceedings of an international conference, Toulouse, France, 19-25 September 1983
The flowsheets, which show the general rules of application of ion-exchange methods for condensate purification, are presented in Figures 8-10. Full demineralization of the condensates by ion exchange leads to the production of water and concentrated salt. The water is used for make-up of cooling water, or after polishing with a mixed bed is used for boiler feedwater. Decationized condensate from the processing of ammonium nitrate can be used instead of demineralized water for absorbing nitrogen oxides in the processing of nitric acid.
Spective as they can easily withstand high levels of suspended matter when used in truly continuous fluidized-beds. Also they should be less readily fouled because the ion-exchange polymer can be present in an uncrosslinked form which is grafted to the exterior of a magnetic polymeric core, to form an active shell as shown in Figure 12. There is an urgent need for processes which will remove specific pollutants such as heavy metals as part of the sewage treatment system, whether by contact with raw sewage, sewage effluent, or sludge.
The canopies of evergreen forests, in particular, can be subjected to high deposition rates. Each country gets part of its acid fall out from its own pollutants, but receives the rest 37 on the winds from neighbouring countries. EMEP has worked out estimates of how much sulphur is emitted, and how much deposited, in individual European countries. This reveals which of them are “net importers” and which “net exporters” of air pollutants. Lakes and rivers were the first victims of acid rain to become evident.
Chemistry for protection of the environment: proceedings of an international conference, Toulouse, France, 19-25 September 1983 by Łucjan Pawłowski, Alain J. Verdier, Federation of European Chemical Societies