2. Define pollution
Pollution is the introduction of contaminants into
the natural environment that cause adverse
change. Pollution can take the form of chemical
substances or energy, such as noise, heat or light.
Pollutants, the components of pollution, can be
either foreign substances/energies or naturally
occurring contaminants. Pollution is often
classed as point source or nonpoint source
pollution.
3. What is water pollution?
โข Water pollution is the contamination of water
bodies (e.g. lakes, rivers, oceans, aquifers and
groundwater). This form of environmental
degradation occurs when pollutants are
directly or indirectly discharged into water
bodies without adequate treatment to remove
harmful compounds.
4. Types Of Water Pollution
Point source water pollution refers to
contaminants that enter a waterway from a
single, identifiable source, such as a pipe or
ditch. Examples of sources in this category
include discharges from a sewage treatment
plant, a factory, or a city storm drain, municipal
storm sewer systems, as well as industrial storm
water, such as from construction sites.
5. Nonpoint Source Pollution refers to diffuse
contamination that does not originate from a
single discrete source. NPS pollution is often
the cumulative effect of small amounts of
contaminants gathered from a large area. A
common example is the leaching out
of nitrogen `compounds from fertilized
agricultural lands.
6. Groundwater Pollution
A spill or ongoing release of chemical or radionuclide
contaminants into soil (located away from a surface
water body) may not create point or non-point source
pollution but can contaminate the aquifer below,
creating a toxic plume.
7. WATER POLLUTANTS
โข Chemical โ When various chemicals are the water pollution
causes. The following chemicals are the most common water
pollutants:
๏ Crude oil and various petroleum products (including gasoline,
diesel fuel, kerosene, motor and lubricating oils, jet fuel). These
compounds are lighter than water and thus always sit on top of water
forming sheens of โfree productโ. However, part of these compounds
dissolve in water and, even in small amounts may be harmful and at
the same time may remain unnoticeable by the eye
๏ Chlorinated solvents which sink in water (are denser than water)
and are quite persistent and toxic. These compounds thus, cannot be
seen by the eye, in contrast with petroleum products that are easily
seen as sheens on top of water surface.
8. ๏ Fertilizers (including nitrates and phosphates) โ while small
amounts are useful to life, higher amounts of nitrates and phosphates
in water are only beneficial to algae and harmful microorganisms
and are poisonous to human and aquatic life. These contaminants
cannot be seen themselves in water (as they do not form sheens or
color the water), but their effects can. The typical effect of water
pollution by fertilizers (usually through agricultural runoff) is the
fast and abundant water growth.
๏ Pesticides/insecticides/herbicides โ comprise a large number of
individual chemicals that get into water due to agricultural activities
directly (by spraying over large areas) or indirectly with agriculture
runoff. The insecticide DDT is a typical example of such type of
water pollutant.
9. ๏ Perchlorate โ Perchlorate Salts Are Used In Rocket Fuels, As Well
As Many Other Applications Such As Fireworks, Explosives, Road
Flares, Inflation Bags, Etc. This Contaminant Is Usually Associated
With Military Bases, Construction Sites (When Explosives Are
Used). However, Natural Formation In Arid Areas May Account For
Perchlorate In Water, Too (E.G., In Chile, Texas Or California
Where Natural Formation Of Perchlorate Has Been Observed)
โข Radiological โ when radioactive materials are the water
pollutant causes.
โข Biological โ when various microorganisms (e.g., bacterial
species and viruses), worms, and/or algae occurring in a large
number are the water pollution causes. This type of pollution is
caused by decaying organic material in water, animal wastes, as well
as improper disposal of human wastes.
10. How Does Water Pollution Affect Us?
Water pollution may cause a large variety of diseases and
poses a serious problem for human health. This is mainly
because we may get exposed to polluted water in various
ways, including, but not necessarily limited to:
โข Drinking polluted water
โข Bathing or showering in polluted water
โข Swimming in polluted water
โข Breathing the vapors of a polluted water while sitting next
to a polluted water source
โข Consuming polluted food (meat and/or vegetables) affected
by polluted water
โข Consuming meat from animals fed with polluted water of
food affected by polluted water (e.g. vegetables irrigated
with polluted water or grown in an area with polluted
groundwater)
11. DISEASE
โข The effects of water pollution may appear
immediately after exposure and be more or less
violent in the case of drinking water with a high
amount of pollutants. On the other hand, the
effects may appear some time after repetitive
exposure to water contaminated with lower
amounts of pollutants. The health effects of
drinking contaminated water may range from
simple intoxication and stomach aches to deadly
diseases or sudden death.
12.
13. WHAT IS AIR POLLUTANT?
โขAny visible or invisible particle or gas found in the
air that is not part of the original, normal
composition.
14. Natural:forest fires, pollen, dust
storm
Unnatural: man-made; coal, wood
and other fuels used in cars, homes,
and factories for energy
15.
16. AQI: Air Quality Index
โขIndicates whether pollutant levels in air may cause
health concerns.
โขRanges from 0 (least concern) to 500 (greatest
concern)
20. Sulfur Dioxide
โขproduced when coal and fuel oil
are burned
โขpresent in power plant exhaust
โขnarrows the airway, causing
wheezing and shortness of
breath, especially in those with
asthma
21. Nitrogen Dioxide
โขreddish, brown gas
โขproduced when nitric oxide
combines with oxygen in
the atmosphere
โขpresent in car exhaust and
power plants
โขaffects lungs and causes
wheezing; increases chance
of respiratory infection
22. Particulate Matter
โขparticles of different sizes and
structures that are released into the
atmosphere
โขpresent in many sources including
fossil fuels, dust, smoke, fog, etc.
โขcan build up in respiratory system
โขaggravates heart and lung disease;
increases risk of respiratory infection
23. Ground Level Ozone
โขat upper level, ozone shields Earth from
sunโs harmful UV rays
โขat ground level, ozone is harmful
pollutants
โขformed from car, power and chemical
plant exhaust
โขirritate respiratory system and asthma;
reduces lung function by inflaming and
damaging lining of lungs
24.
25.
26. โขCombination of gases with water vapor
and dust
โขCombination of words smoke and fog
โขForms when heat and sunlight react
gases (photochemical smog)
โขOccurs often with heavy traffic,
high temperatures, and calm winds
36. Definition
Sound, a normal feature of our life, is the means of
communication and entertainment in most animals,
including human beings. It is also a very effective
alarm system. A low sound is pleasant whereas a
loud sound is unpleasant and is commonly referred
to as โnoiseโ. Noise can be defined as an unpleasant
and unwanted sound.
37. WHAT IS NOISE POLLUTION?
๏ขSound that is unwanted or disrupts oneโs quality of life
is called as noise. When there is lot of noise in the
environment, it is termed as noise pollution.
๏ขSound becomes undesirable when it disturbs the
normal activities such as working, sleeping, and during
conversations.
๏ขIt is an underrated environmental problem because of
the fact that we canโt see, smell, or taste it.
๏ขWorld Health Organization stated that โNoise must be
recognized as a major threat to human well-beingโ
38. Sources of Noise Pollution
1. Transportation systems are the main source of noise
pollution in urban areas.
2. Construction of buildings, highways, and streets cause a
lot of noise, due to the usage of air compressors,
bulldozers, loaders, dump trucks, and pavement
breakers.
3. Industrial noise also adds to the already unfavorable
state of noise pollution.
4. Loud speakers, plumbing, boilers, generators, air
conditioners, fans, and vacuum cleaners add to the
existing noise pollution.
39. Effects of Noise Pollution
โข Effects on Human
โข Effects onAnimals
โข Effects on Environment
โข (Vegetation, Property)
40. Effects on Human
o Hearing Impairment
o Interference with Spoken
Communication
o Decrease in Efficiency
o Lack of Concentration
o Fatigue
o Sleep Disturbances
o Cardiovascular Disturbances
41. Continuedโฆโฆ
โข Disturbance in Mental Health
โข Impaired Task Performance
โข Negative Social Behavior and Annoyance
reactions
โข Abortion
โข Abnormal Fetus
โข Temporary or Permanent Deafness
42. Diseases Caused by Noise Pollution
โข High Blood Pressure
โข HeartAttack
โข Cancer
โข Asthma
โข Coughing, wheezing
โข Deafness
โข Annoyance
โข Stress
โข Anxiety
โข Reduced lung development
โข Bronchitis
โข Insomnia
โข Arterious Clerosis
43. Effect onAnimals
โข Damages Nervous system
โข Altering Prey/predator detection
โข Creates problems in Navigation
โข They become Dangerous andAttacking
โข Raise Metabolism
โข Reduction of useable Habitat
โข Death of Certain Species
โข Genetic and Evolutionary Problems
44. Continuedโฆ..
โข Hormone imbalance
โข Chronic Stress
โข Panic and Escape Behavior
โข Abandonment of Offspring
โข Injury
โข Loudness of Interspecies Communication
45. Effects on Environment
Breakage of Earth Barrier
Poor Quality of Crops
Damages Buildings, bridges andMonuments
Weakens the Edifice of Building
47. Definition
โข Waste (or wastes) are unwanted or unusable materials.
Waste is any substance which is discarded after primary
use, or it is worthless, defective and of no use.
โข Solid waste is the unwanted or useless solid materials
generated from combined residential, industrial and
commercial activities in a given area.
48. Sources Of Solid Waste
Residential
Food wastes, paper, cardboard, plastics, textiles, leather, yard wastes,
wood, glass, metals, ashes, special wastes (e.g., bulky items, consumer
electronics, white goods, batteries, oil, tires), and household hazardous
wastes.).
Industrial
Housekeeping wastes, packaging, food wastes, construction and
demolition materials, hazardous wastes, ashes, special wastes.
Commercial
Paper, cardboard, plastics, wood, food wastes, glass, metals, special
wastes, hazardous wastes.
49. Institutional
Paper, cardboard, plastics, wood, food wastes, glass, metals, special
wastes, hazardous wastes.
Construction and demolition
Wood, steel, concrete, dirt, etc.
Municipal services
Street sweepings; landscape and tree trimmings; general wastes from
parks, beaches, and other recreational areas; sludge.
Process (manufacturing, etc.)
Industrial process wastes, scrap materials, off-specification products,
slay, tailings.
Agriculture
Spoiled food wastes, agricultural wastes, hazardous wastes (e.g.,
pesticides).
50. Hazardous Wastes
Radioactive wastes, toxic chemicals. Flammable wastes, explosives,
hazardous biological wastes from hospitals or research institutions.
Pathological Wastes
Carcass of animals slaughter house wastes (blood, pieces of meat, hair,
fat, bone chippings, hides, skin excretions etc.
51. Effect of Solid Waste Disposal
1. Contaminates water and air, resulting into diseases and
dysentery in Human beings.
2. Mosquitoes breed in the stagnant water, blocked due to
waste choked in the drains.
3. Decomposition of solid waste spreads obnoxious odour
in the air, thus polluting it.
4. Burning of waste, especially plastic adds up obnoxious
fumes in the air.
5. Garbage dumps and decomposed waste helps many
harmful species to breed in them.
6. The infected water supply also leads to large scale
epidemics.
52. Methods of solid waste management
i. Sanitary Land Filling:
In a sanitary landfill, garbage is spread out in thin layers,
compacted and covered with clay or plastic foam. In the
modern landfills the bottom is covered with an impermeable
liner, usually several layers of clay, thick plastic and sand.
The liner protects the ground water from being contaminated
due to percolation of leachate.
ii. Incineration:
The term incinerates means to burn something until nothing
is left but ashes. An incinerator is a unit or facility used to
burn trash and other types of waste until it is reduced to ash.
53. iii. Composting:
Composting is a biological process in which micro-
organisms, mainly fungi and bacteria, convert degradable
organic waste into humus like substance. This finished
product, which looks like soil, is high in carbon and nitrogen
and is an excellent medium for growing plants.
iv. Pyrolysis:
Pyrolysis is a form of incineration that chemically
decomposes organic materials by heat in the absence of
oxygen. Pyrolysis typically occurs under pressure and at
operating temperatures above 430 ยฐC
54. THANKING YOU
P r e s e n t a t i o n C o m p i l e d B y : -
S u v a n k a r R a y
A s s t . P r o f e s s o r
M a n g a l a y a t a n U n i v e r s i t y