Faculty of allied medical sciences. Environmental Health (NREH-101). Pollution. SUPERVISION Prof. Dr. Mervat Salah. Outcomes :. 1-To know the meaning and classification of pollution 2-To understand biological pollution 3-To know water related diseases
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Prof. Dr. MervatSalah
1-To know the meaning and classification of pollution
2-To understand biological pollution
3-To know water related diseases
4-To study control and prevention of pollution
Any undesirable change in physical , chemical or biological characteristics of air , land , water
Pollution is the introduction of contaminants into an environment that causes instability, disorder, harm or discomfort to the ecosystem i.e. physical systems or living organisms.
Pollution can be classified according to source:-
Solid Waste (domestic waste- medical waste- industrial waste- construction waste- Agricultural waste )
Pollution is divided into global pollution and local pollution .
Polluted water & contaminated water:
Polluted water: water contain physical and chemical pollutants
Contaminated water: water contain biological pollutants
Point and Non-point Source pollution
include sewers, industrial discharges, street drains combined sewer outfalls
include agricultural runoff, road runoff, landfill drainage, erosion & sedimentation processes, dead aquatic life and boats& ships
Inorganic: Ammonia, nitrite, nitrate, sulphate,
phosphate, hardness, chloride, solids, fluoride, heavy metals
Organics: pesticide, phenol, oil & grease , biodegradable organic matter and non-biodegradable matter .
Bactria, virus, parasites, protozoa
Sources – Effect – control measures
S: cooling water, power station waste discharge
E: Raising water temp and affect on aquatic life in the stream and uses of stream
C: Apply waste minimization rule (4 R) and environmental laws that control discharge of wastewater on receiving streams
S : natural source (aquatic life, erosion , runoff water) and man-made source( industrial waste, sewage)
E : affecting on quality of water and its uses as recreational area (bathing) and navigation, affecting on aquatic life living in the stream, and on uses of water in industrial purposes (corrosion problem)
C: Apply waste minimization rule (4R: reduction; recycle ; reuse; recovery) before discharge, and environmental laws that control discharge of wastewater on receiving streams
Two of the viruses that cause hepatitis (hepatitis A and E) can be transmitted through contaminated water and food;