By Dr. Robert Guderian (auth.)
Emissions of gaseous air pollution have elevated within the final years despite elevated controls and drawback for air caliber. Predictions of destiny improvement additionally point out extra elevate in emissions needs to be anticipated. From an intensive research of gasoline use in traditional energy vegetation in and for household heating, Brocke and Schade (1971) and Schade (1975) expect that sulfur dioxide (S02) emissions within the Federal Republic of Germany increases from '3. five million t in 1969, over four. 2 million t in 1973, to four. 6 million t in 1980. Rasch (1971) predicts that emission of hydrogen chloride (HCI) from burning of wastes increases from a gift 8000 t/year to approximately one hundred thousand t in 1980. Emission of gaseous fluoride compounds, in North Rhine Westphalia on my own, are anticipated to extend from 7500 t in 1969 to 8800 t in 1985 (MAGS, 1972). comparable predic tions have additionally been made within the united states (Heggestadt and Heck, 1971). A doubling of S02 emissions from oil and especially coal-fired energy crops is anticipated among 1960 and 1980 (Wood, 1968; Lewis et aI. , 1974). while it really is thought of that overall keep an eye on of air toxins is technically and particularly economically very unlikely, it's important that, sooner or later, emissions are managed inside a technical and monetary framework to such an quantity that ambient pollutant concentrations close to the floor current no risk to guy or his setting (BImSchG, 1974).
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Additional info for Air Pollution: Phytotoxicity of Acidic Gases and Its Significance in Air Pollution Control
From this experiment it is obvious that, while pollutant uptake and degree of injury may be influenced by temperature, there are distinct species-dependent differences. Fluoride accumulation in above ground plant parts of alfalfa, orchard grass (Dactylis glomerata), and endive (Lactuca sativa var. , 1965). After exposure of spruce (P. abies) to 3SS02 at an outside temperature of - 6° C, Materna and Kohout (1963) found counts of 16540 and 16880 impulses/ min in the two youngest needle sets and showed that even outside the temperature range for active photosynthesis, sulfur uptake is possible.
At the end of 53 h, photosynthesis of these plants dropped 14 ppm to about 50% of the control plants. Photosynthesis of plants under SOz alone was reduced 3 ppm and 5 ppm under HCI alone. The degree of leaf injury of plants fumigated with both components is even more significant. 0% for plants under SOz and HCI compares with 25% for plants under SOz and HCI together. An increase in effects has also been shown for combinations of other pollutants. 30 ppm SOz for 2 or 4 h. No injury occurred to plants exposed to SOz and ozone alone in these concentrations.
This sensitivity rests on the fact that the major portion of important physiologic processes are concen- Leaf Age 45 trated in the leaf, which acts as the center of variability or plasticity of the organism. Therefore, the leaf, with its various stages of development, is an especially good indicator for particular atmospheric pollutants. The sensitivity of the leaf, determined through leaf age, varies with type and concentration of a given pollutant. Observations are reported in the first books on air pollutant effects (von Schroder and Reuss, 1883; Haselhoff and Lindau, 1903) in which leaf age is correlated with S02 sensitivity.
Air Pollution: Phytotoxicity of Acidic Gases and Its Significance in Air Pollution Control by Dr. Robert Guderian (auth.)