Download e-book for iPad: Acid Deposition: Proceedings of the CEC Workshop organized by Prof. J. Schmoelling (auth.), S. Beilke, A. J. Elshout

By Prof. J. Schmoelling (auth.), S. Beilke, A. J. Elshout (eds.)

ISBN-10: 9400971397

ISBN-13: 9789400971394

ISBN-10: 9400971419

ISBN-13: 9789400971417

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Read or Download Acid Deposition: Proceedings of the CEC Workshop organized as part of the Concerted Action “Physico-Chemical Behaviour of Atmospheric Pollutants”, held in Berlin, 9 September 1982 PDF

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Additional info for Acid Deposition: Proceedings of the CEC Workshop organized as part of the Concerted Action “Physico-Chemical Behaviour of Atmospheric Pollutants”, held in Berlin, 9 September 1982

Example text

Our investigations are directed to detect effects of the different stress factors acting on the ecosystem, including climate, biomass utilization and choice of tree species. These investigations have already given considerable information about the interaction of the various stress factors, including air pollutants. This information has been presented in several papers (eogo ULRICH et al o 1979, ULRICH 1983a and b), Thus we have done precisly what ZIMMERMEYER demands but he seems not to recognize this, The only environmental factor for forests which has been changed is the "chemical climate" by air pollution o There is therefore no doubt that this change is the driving force for a development in the ecosphere which is characterized not only by tree and forest die-back, but also by the acidification of waters and by the disappearence of species at an increasing rate o The data about load, carrying capacity and visible damage are more than enough to claim a rapid and considerable reduction of air pollution to avoid a possible ecological catastrophe The facts mentioned indicate that the catastrophe may be already in its initial stage - a century after the pollution of the ecosphere has been started.

The ori gi n of [NH 3] gin the ground 1ayer is usually the soil. g. high [NH] over agricultural land, lowoverpinetree forest). It is also obse~~d that in the liq~id layer of airborne particles, the concentration ratio [NHtl! [H J will be altered as the air mass is moving over regions with different ammonia emissions. 5. Characterization of the acidity in lake water Until now, only a few lake waters have been investigated in detail with respect to their acid properties. However, in all samples studied so far there have also been found weak acids other than H2CO .

The protons of the strong acids are in this case transferred to the weakest acid existing: water. This corresponds to a neutralization. The acids disappear, the salts formed contain nutrients which are toxic only at very high concentrations. The presence of carbonates in forest soils is very limited, this buffer substance plays a role almost only if it is added to the soil by fertilization. Silicates are, on the contrary, very widespread in soils. However, their reaction with strong acids is kinetically limited.

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Acid Deposition: Proceedings of the CEC Workshop organized as part of the Concerted Action “Physico-Chemical Behaviour of Atmospheric Pollutants”, held in Berlin, 9 September 1982 by Prof. J. Schmoelling (auth.), S. Beilke, A. J. Elshout (eds.)


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