Chemistry

Environmental Chemistry

Created : 2022-03-02 12:05

Tropospheric Pollution

  • It is a type of Atmospheric pollution.
  • Troposphere is region of strong air movement and cloud formation.
  • Gaseous air pollutants are oxides of sulphur, nitrogen and carbon, hydrogen sulphide, hydrocarbons, ozone and other oxidants.
  • particulate matters are dust, mist, fumes, smoke, smog etc.
  • Oxides of Sulphur : High conc of causes stiffness of flower buds and its eventually falling from the plant. But the presence of particulate matter catalyses to .
  • Oxides of Nitrogen : High conc of damage leaves of plants and retard the rate of photosynthesis. It is a lung irritant causing respiratory problems in children, harmful to living tissues along with verious textile fibres and metals.
  • Hydrocarbons : Are carcinogenic also causes againg, breakdown of tissues and shedding of leaves, flowers and twigs in plants.
  • Oxides of Carbon : is mainly released by automobiles, domestic fuel etc. They bind with haemoglobin to form Carboxyhaemoglobin when this reaches 3-4% oxygen carrying capacity of blood is greatly reduced.
    • Carbon Dioxide : is confined only to troposphere forms 0.03% of total vol of atmosphere. Causes global warming.
    • Global warming is when gases such as , , CFCs, , Nitrous oxide, water vapour etc. traps the heat that is radiated back by the Earth increasing its temp.
    • 3.1 Climate Change and Impact on India > Acid Rain
  • Particulate Pollutants : minute solid particles or liquid droplets. Viable pollutants are bacteria, fungi, moulds, algae etc.
    • Non viable are smoke, dust over 1 mico meter in diameter ex pulverised coal, cement and fly ash from factories. Mists that are produced by particles of spray liquids and condensation of vapurs in air.

Stratospheric Pollution

  • Another type of Atmospheric pollution.