Acid
rain takes place as a direct result of the natural cleaning process of
the atmosphere. The tiny droplets of water which form clouds confine
within them the suspended solid particles and gases in the atmosphere.
Among these gases are sulfur oxides and nitrogen oxides which are them
chemically converted into sulfuric and nitric acids. Other than this
some sulfuric acid may also be formed directly in the droplets of water
from the reaction of sulfur dioxide and hydrogen peroxide.
Some of the effects caused by acid rain and the sulfuric acid present in it are:
•
The acid may react with buildings and marble made structure by reacting
with the Calcium carbonate and this reaction forms Calcium bicarbonate
which is soluble and hence causes the structures, buildings etc to
deteriorate.
• Acid rain can filter aluminum from the soil
and make it get mixed with ground water, lakes or rivers. This can
poison fish and many plant roots.
•Acid rain disrupts the process of photosynthesis, hence causing damage to plant life
•If
the acid rain is highly concentrated, it slows down the production of
chlorophyll and at high concentration it may kill plants.
The relationship between Acid Rain and Corrosion?
Acid
rain is the mixing of different harmful gases such as sulfur and
nitrogen and when they mix with rain they form acid rain.The main
causes of these harmful gases are cars,various factories and
powerplants.Due to the harmful emissions acid rain is formed.As
population increases so do all these harmful emissions.One of the main
contributors that lead to acid rain are coal powerplants.As to why the
corrosion,well when sulfuric acid and the calcium compounds in various
buildings and monuments mix together they lead to the creation of
gypsum which eventually flakes off leading to corrosion.Acid rain also
has many diverse effects on the environment.
When
petroleum burns, it produces oxides of nitrogen and that rise up into
the atmosphere. There they get mixed by wind and undergo chemical
reactions with sunlight and moisture. After some days, the sulfuric
acid and nitric acid particles fall as acid rain. So not only sulphuric
acid is involved but nitric acid also plays an important role. Due to
acidic features acid rain eats into the stone surfaces at once. These
particles settle into crevices and molding, and
the damage they create comes later. When rain comes in contact with the deposits corrosion is there.
the damage they create comes later. When rain comes in contact with the deposits corrosion is there.
What can the Acid Rain do to the soil and water?
Soils
Soil
biology and chemistry can be seriously damaged by acid rain. Some
microbes are unable to tolerate changes to low pHs and are killed.The enzymes of these microbes are denatured (changed in shape so they no longer function) by the acid. The hydronium ions of acid rain also mobilize toxins, e.g. aluminium, and leach away essential nutrients and minerals.
- 2H+ (aq)+ Mg2+ (clay)⇌ 2H+ (clay)+ Mg2+(aq)
Soil
chemistry can be dramatically changed when base cations, such as
calcium and magnesium, are leached by acid rain thereby affecting
sensitive species, such as sugar maple (Acer saccharum).
Acid
rain has many adverse effects on plant life. It may be direct or
indirect. It stunts the growth of plants. The worst adverse effect is
that acid rain seriously damages the soil biology.Only a few
microbes consume acids. The enzymes of there microbes change shape by
the acid. To retain the pH of the soil lime stone can be used.
Surface waters and aquatic animals
Both
the lower pH and higher aluminum concentrations in surface water that
occur as a result of acid rain can cause damage to fish and other
aquatic animals. At pHs lower than 5 most fish eggs will not hatch and
lower pHs can kill adult fish. As lakes and rivers become more acidic
biodiversity is reduced. Acid rain has eliminated insect life and some
fish species, including the brook trout
in some lakes, streams, and creeks in geographically sensitive areas,
such as the Adirondack Mountains of the United States.However, the
extent to which acid rain contributes directly or indirectly via runoff
from the catchment to lake and river acidity (i.e., depending on
characteristics of the surrounding watershed) is variable.
No comments:
Post a Comment