Water pollution



Download 233 Kb.
Date07.12.2018
Size233 Kb.

WATER POLLUTION

  • DR MOHD HASNI HJ JAAFAR
  • ENVIRONMENTAL PHYSICIAN
  • DEPARTMENT OF COMMUNITY HEALTH, UKM MEDICAL CENTRE,
  • MALAYSIA

WATER

  • 71% from earth surface.
    • 97% salt water (sea)
    • 3% fresh water
  • Function
    • Domestic.
    • Industry.
    • Agriculture.
    • Recreation.
    • Safety and security.

WATER

  • 70% total human body wt.
  • 30 – 40% bone mass.
  • Body functions:
    • Absorption of oxygen at alveoli.
    • Control of body temperature.
    • Blood component.
    • Digestion in kidneys and intestine.
  • Alteration of 10% body content – health problem.
  • Alteration of 20% body content – death.

WATER POLLUTION

  • Ideal water supply
    • Quality.
    • Quantity.
  • Water quality parameter
    • Physical.
      • Suspended solid (SS), color, taste, smell, temp.
    • Chemical.
      • Dissolved substances, alkalinity, hardness, fluoride, heavy metal, organic compound, nutrient (nitrogen & phosphorus), pH, biochemical oxygen demand (BOD), chemical oxygen demand (COD).
    • Biology.
      • Bacteria, virus, protozoa, helminthes.

SOURCES OF WATER POLLUTION

  • Uncontrolled land development since colonial era (end 19th century).
    • Agriculture (logging, estate, farms).
    • Mining (tin, gold, cuprum).
    • Industrialization.
    • Housing development.
    • Hydro dam.

SOURCES OF WATER POLLUTION

  • Pollution of clean water resources
    • Erosion at water catchments areas.
    • Erosion of rivers.
    • Effluent from rubber and palm oil factories.
    • Effluent from mining site.
    • Effluent from industry area.
    • Effluent from farming area.
    • Effluent from domestic area.

SOURCES OF WATER POLLUTION

  • SOURCES
  • YEAR
  • 1978
  • 1979
  • 1985
  • 1990
  • Palm Oil factory
  • Rubber factory
  • Mining
  • Industry
  • Farming
  • 1
  • 2
  • 3
  • 4
  • 5
  • 1
  • 2
  • 3
  • 5
  • 6
  • 4
  • 5
  • 3
  • 1
  • 2
  • 6
  • 5
  • 3
  • 1
  • 2
  • Mohamad Ismail Yaziz 1993

SOURCES OF WATER POLLUTION

  • Puncak Niaga, 2001
    • Effluent from factories and agricultural activities.
    • Land and forest clearance activities.
    • Mining.
    • Solid waste.
    • Wastewater.

SOURCES OF WATER POLLUTION

  • DOE, 1998
    • River cleanliness
      • 25% clean (68.2% - 1989)
      • 65% moderately polluted (29.3% - 1989)
      • 10% polluted (2.5% - 1989)
    • Source of pollution
      • 43% from farming and domestic.
      • 34% from forest clearance and development.
      • 21% from industries.

SOURCES OF WATER POLLUTION

  • DOE, 1998
    • Marin pollution
      • 94.5% by oil and grease.
      • 73.7% by suspended solids.
      • 28.7% by E.coli
    • Underground water pollution
      • 3% contents mercury, cadmium and lead.
      • 23% contents phenolic.
      • 40% contents arsenic.

TYPE OF POLLUTION

  • pH.
  • Organic content (BOD).
  • Suspended solids.
  • Ammonium-nitrogen.
  • Micro bacteria.
  • Heavy metals
    • lead, cuprum, cadmium.
  • Pesticides.

WATER POLLUTION

  • Will cause
    • Soil contamination.
    • Air contamination.
    • Food chain contamination.
    • Esthetic.
  • Lack of clean water supply for
    • Domestic demand.
    • Industry use.
    • Agriculture use.

WATER POLLUTION

  • Will also cause
    • Breeding of diseases vector.
    • Spreading of water borne diseases.
    • Food poisoning.
    • Skin problem.

WATER POLLUTION

  • PBB
    • 80% of diseases in developing countries are due to water supply contamination.
    • 4 – 5 million child died every year due to water supply contamination.
    • More than 1 million died after severe diarrhea.

WATER POLLUTION

  • Including chemical, physical and biological content.
  • Following standards and guidelines.
  • Using measurement of
    • pH, color, cloudiness, conductivity.
    • Heavy metals, nutrient, pesticide, microbe.
  • Good water quality is where it free from disease organism, dangerous chemical substances, radioactive, accepted taste and smell.

WATER POLLUTION CONTROL

  • Since March 1978.
  • 443 sampling station by DOE.
  • Other agencies
    • Health Department.
    • Department of Irrigation and Drainage.

WATER POLLUTION CONTROL

  • GOVERNMENT AGENCIES
  • WATER
  • DOE,
  • Department of Irrigation and Drainage,
  • Mining and Mineral Department,
  • Local Authority,
  • Fishery Department,
  • Health Department.



Share with your friends:


The database is protected by copyright ©sckool.org 2019
send message

    Main page