Environmental chemistry plays a vital
role in environment. Environmental chemistry means scientific study of chemical
and bio chemical process occurring in environment. World Environmental Day is
celebrated on fifth of June of every yea
is the effect of undesirable changes in the surrounding that have harmful
effects on living things.
Pollutants, polluting environments are
generally classified as rapidly degradable (e.g. discarded vegetables),slowly
degradable(e.g. Agriculture waste) and
non-bio degradable pollutants (e.g. DDT, plastic materials).
Ecological disturbance is regarded as
an event of intense environmental stress and causes large changes in the
affected ecosystem. It can be natural or by human activities.
pollutions include tropospheric and stratospheric
pollution. Troposphere and stratosphere greatly affect the biosphere of the
earth due to which study of pollutions in these regions is most important.
Tropospheric pollution: Troposphere is the lowest region of atmosphere
in which man, animal and plants exists.Gaseous
pollutants like SOx,NOx,CO,CO2,O3 hydrocarbons and
particulate pollutants like dust, mist, fumes, smog cause pollutions in
Acid rain: When the PH of rain water
becomes lower than 5.6 it is called acid
rain. Acid rain is a byproduct of various human
activities that emit sulphuroxides and nitrogen oxides in atmosphere. It
damages buildings, statues and other monuments.. The
acid rain in water reservoir like rivers, ponds adversely affects microbes ,aquatic plants and fishes.
Greenhouse effect: The process of warming up of earth is known as greenhouse effect or global warming. CO2,CH4,O3,CFC,N2
and water vapour present in atmosphere act as a greenhouse gases. Heat retaining
capacity of greenhouse gases are called
Global Warming Potential(GWP).The GWP based
sequence of greenhouse gases is
Stratosphere extends above
troposphere up to 50Km above .
Depletion of ozone layer: Ozone layer present in stratosphere protect
the living species against harmful UV rays from space but Ozone Depletion
Substance(ODS) used by humans deplete
ozone layer. To create awareness in the Whole world, United Nations decided
to celebrate 16th September of every year as “Ozone Layer Protection Day”.
Water is the elixir of
life but it is polluted by point and nonpoint sources. Institutions like World Health Organization
(WHO) and Bureau of Indian standards (BIS) and Indian Council of Medical
Research (ICMR) have prescribed standards for quality of drinking water.
Lithosphere with humus cover is known as soil.
The topsoil soil provides water and all nutrients required by plants for their
growth. Industrial waste, artificial fertilisers, pesticides results in soil
The strategies for
controlling environmental pollution can be waste
management. Waste management
involves reduction and proper disposal of waste. Wastes are produced in three
forms, solid, liquid and gaseous. Solid waste can be disposed by segregation, dumping,
incineration and composting.
control environmental pollution resulted in development of science for
synthesis of chemical favorable to environment which is called green chemistry. Green chemistry means science of
environmentally favorable chemical synthesis.