The students:Vafiadi Αnthi, Parianou Emmanouela,Lyga Fotini, Mixalitsli SarlotAlexandros LazaridisPhysical Education TeacherM.Sc Sports NutritionProject: Environment and Human Health
Acid rain is otherwise known as the phenomenon ofabnormally acidic precipitation, e.g. Rain, hail, snow,fog, frost, and dry as dust.
The term acid rain refers to the presence of dissolvedacidic pollutants, namely substances (gases or not)that are not physiological characteristics of clean air,but are products of human activity or other pollutantcauses (e.g. volcanic activity).
Because the various gases of fossil fuels like oil andcoal, often contains (acidic) oxides of sulfur andnitrogen, among others, this produces acid raincontaining dissolved corresponding acids.
Acid rain brings devastating effects on ecosystems,crops, cultural sites and assets of citizens (e.g. cars).
The heavy impact of this phenomenon has led, inrecent years, many governments to impose laws andother measures to reduce the phenomenon andtherefore its impact.
Origin of pollutants that form acid rain:The most important gases that lead to theformation of acid rain are sulfur dioxide (SO2)and nitrogen oxides which are oxidized to formnitrogen dioxide (NO2) and when dissolved inwater, forms nitric acid (HNO3). These gasescome from the following main sources:
Volcanic activity and wildfires place a heavy burden onthe Earth every year.
Acid melting ice: Part of the ice caps are meltingbecause of global warming and contain dissolved acidgases, mainly from the intense volcanic activity of thetime they were created.
Consequences Acid rain has a strong impact on natural ecosystems(forests, wetlands, soil), directly or indirectly killing lifeforms, but also in residential ecosystems, erodinghistorical monuments, causing damage to buildings andvehicles, but also directly harming human health.
Conclusion: Acid rain is a big problem. It causes the death of ourlakes, our rivers, wildlife and also harms people. It alsocauses other problems which are also very serious suchas the release of aluminum and lead in our watersupplies. Unfortunately, we suffer because of this.Hopefully acid rain in the future will be reduced as aresult of the measures taken.
Detected in rainfall are extremely dangerouspollutants, such as platinum, palladium, iridium,osmium, ruthenium, etc.. These elements are allcatalysts for cars. Their role is to reduce the pollutioncaused by the release of gases.Acid rain new generation
With time and due to the natural deterioration ofcatalysts, the aforementioned metals are released intothe atmosphere. These pollutants are airborne. Thewater of rains lure them and scatters them everywhere.
These pollutants are highly toxic and cause allergies,asthma, kidney and heart problems. In its report,Greenpeace says the "new" acid rain affects plants.They burn them causing suffocation, which deprivesthem of oxygen, damaging them irreparably. This acidrain has made its appearance in Athens, Mexico City,Rome, New York, Frankfurt and many more cities.
The new theory A scientist in Norway, Rosenqvist, had troublebelieving that acid rain alone could affect lakesin such deadly way.
Why, during heavy rain, can rivers be up to fifteentimes more acidic than the rain itself? It cannot onlybe rain that destroys the lakes. "Soon scientists wereforced to accept this explanation due to the lack of abetter theory.
Sulfuric acid consists of two parts; the two ions. Thehydrogen ion is what makes a substance acid. Theother ion is sulphate. When there are more hydrogenions a substance is more acidic. Therefore, when raincauses flooding river water passes through the soil.
Since the industrial revolution in Great Britain therehas been a continuously growing amount of sulfur insoil. In rivers there is not enough sulfur to form acid inlarge quantities.
However, in the soil there is a large amount of sulfur tohelp form the acid. When the sulfur combines withwater the pH is much smaller. This phenomenon is themost lethal effect of acidification in water.
But with the help of sulfur in the soil it can be done.