Environmental pollution (Microbiology)
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This document outlines standards and procedures for measuring environmental pollution. It discusses the Air Quality Index (AQI) which indicates air pollution levels from 0 to 500. Five major pollutants are described - carbon monoxide, sulfur dioxide, nitrogen dioxide, particulate matter, and ground-level ozone - along with their dangerous health effects. Parameters for air pollution measurement include the area, time period, measurement height and certainty. Measurement procedures are outlined for inorganic gases like sulfur dioxide, nitrogen oxides, ozone and carbon monoxide using conductometry, chemiluminescence and infrared absorption techniques.
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- 1. STANDARDS & PROCEDURE FOR ENVIRONMENTAL POLLUTION Presented by : Mubbshir Qureshi Presented to : Dr. ALLAHNAWAZ KHAN
- 2. outline Standards Major pollutants and their effects Parameters for measurement
- 3. AQI: Air Quality Index Indicates whether pollutant levels in air may cause health concerns. Ranges from 0 (least concern) to 500 (greatest concern) More than 60 countries are using this
- 7. 5-major pollutants and their dangerous effects
- 10. Carbon Monoxide Colorless, odorless Produced when carbon does not burn in fossil fuels Present in car exhaust Deprives body of O2 causing headaches, fatigue, and impaired vision
- 12. Sulfur Dioxide Produced when coal and fuel oil are burned Present in power plant exhaust Narrows the airway, causing wheezing and shortness of breath, especially in those with asthma Sulfur Dioxide
- 14. Nitrogen Dioxide Reddish, brown gas Produced when nitric oxide combines with oxygen in the atmosphere Present in car exhaust and power plants Affects lungs and causes wheezing; increases chance of respiratory infection
- 15. Particulate Matter Particles of different sizes and structures that are released into the atmosphere Present in many sources including fossil fuels, dust, smoke, fog, etc. Pan build up in respiratory system Aggravates heart and lung disease; increases risk of respiratory infection
- 16. Ground Level Ozone At upper level, ozone shields Earth from sun’s harmful UV rays At ground level, ozone is harmful pollutants Formed from car, power and chemical plant exhaust Irritate respiratory system and asthma; reduces lung function by inflaming and damaging lining of lungs
- 17. Parameters for measuring air pollution
- 18. Parameters for measuring air pollution Area of measurement Measurement time period(1 year, at least 6 months) Measurement height(1.5 to 4 meters above ground) Necessary certainty of measurement results(High)
- 19. Parameters for measuring air pollution Duration of each measurement(1/2 hour for gaseous pollutants,24 hours for suspended dust, 1 month for dust precipitation) Measured object(Air pollution emitted from the planned facility) Costs(Depend on measurement area and objectives)
- 20. Measurement procedures of environmental pollution
- 21. Measurement procedures for inorganic gases SO2:- Conductometry reaction of SO2 with H2O2 in dilute H2SO4; measurement of increased conductivity NO/NO2:- Chemiluminescence; reaction of NO with O3 to NO2; detection of chemiluminescence radiation with photomultiplier
- 22. Measurement procedures for inorganic gases Ozone:-Chemiluminescence; reaction of O3 with ethene to formaldehyde; detection of chemiluminescence radiation with photomultiplier CO:-Non-dispersive infrared absorption; measurement of IR absorption with specific detector
Editor's Notes
- A photomultiplier tube, useful for light detection of very weak signals, is a photoemissive device in which the absorption of a photon results in the emission of an electron. These detectors work by amplifying the electrons generated by a photocathode exposed to a photon flux