Smog Smoke and fog London Smog Industrial smog

  • Slides: 24
Download presentation
Smog • Smoke and fog • London Smog / Industrial smog / reducing smog

Smog • Smoke and fog • London Smog / Industrial smog / reducing smog • Caused by the combustion of sulfur containing coal • Water droplets, SO 2, SO 3, soot, fly ash and sulfuric acid

Reducing Smog • Chicago, Beijing • Cold, wet winters • Thermal inversion traps cold

Reducing Smog • Chicago, Beijing • Cold, wet winters • Thermal inversion traps cold air close to earth surface • Decline in reducing smog • Use of SNG, alkaline scrubber

London Smog

London Smog

London Smog : SO 2 • water droplets in the air condenses on smoke

London Smog : SO 2 • water droplets in the air condenses on smoke particles produced by the burning of coal, forming tiny smog droplets. -sulfur dioxide -Sulfur dioxide is a gas that attacks the lungs and makes breathing difficult

SO 2 smog

SO 2 smog

Photochemical smog Oxidizing smog

Photochemical smog Oxidizing smog

• Photochemical smog

• Photochemical smog

Photochemical smog

Photochemical smog

Photochemical smog • clear, sunny skies • warm temperatures • stable air conditions under

Photochemical smog • clear, sunny skies • warm temperatures • stable air conditions under a stationary high pressure system • onshore sea-breeze

Pollutant level during the Day

Pollutant level during the Day

Thermal Inversion

Thermal Inversion

E 10 Thermal Inversion Effects on Air Quality

E 10 Thermal Inversion Effects on Air Quality

Thermal Inversion • Gradual decrease in temperature as the altitude increases • Warmer, denser

Thermal Inversion • Gradual decrease in temperature as the altitude increases • Warmer, denser air near the earth surface • Pollutants produced near the surface of the earth move with warm air to the upper atmosphere • Cooler air takes the place of rising warm air near the earth surface

Thermal Inversion • Air currents allow the pollutants to be dispersed • Abnormal temperature

Thermal Inversion • Air currents allow the pollutants to be dispersed • Abnormal temperature arrangement of air masses where a layer of warmer air is trapped between the two layers of cold air • Wind gives horizontal movement of air • Mountains hinders the dispersion • Flow of cold air creates cool layer

Thermal Inversion • No wind, cold temperatures, , mountains • Warmer air acts as

Thermal Inversion • No wind, cold temperatures, , mountains • Warmer air acts as lid

Thermal Inversion • a lt it u d e Normal Condition Cooler air Thermal

Thermal Inversion • a lt it u d e Normal Condition Cooler air Thermal Inversion Cold clean air Warmer air Polluted cold air Warmer air temperature

Smog • Photochemical

Smog • Photochemical

Hydroxide radical

Hydroxide radical

• Photochemical Smog

• Photochemical Smog

In summary, this is what happens in photochemical smog formation • 1) Nitrogen oxides

In summary, this is what happens in photochemical smog formation • 1) Nitrogen oxides generate oxygen atoms • 2) Oxygen atoms form hydroxyl radicals • 3) Hydroxyl radicals generate hydrocarbon radicals • 4) Hydrocarbon radicals form hydrocarbon peroxides • 5) Hydrocarbon peroxides form aldehydes • 6) Aldehydes form aldehyde peroxides • 7) Aldehyde peroxides form peroxyacylnitrates

O 3

O 3

Ethanol

Ethanol

LONDON PART 1 LONDON LONDON LONDON LONDON LONDONLONDON PART 1 LONDON LONDON LONDON LONDON LONDON
FOG Content Radiation Fog Advection Fog Stratus BuildFOG Content Radiation Fog Advection Fog Stratus Build
Smog What is smog Smog sometimes also referredSmog What is smog Smog sometimes also referred
Smog When smoke and fog combine Two typesSmog When smoke and fog combine Two types
GroundLevel Air Pollution SMOG Smog combination of smokeGroundLevel Air Pollution SMOG Smog combination of smoke
SecondHand Smoke What is second hand smoke SmokeSecondHand Smoke What is second hand smoke Smoke
London London London Industrial Revolution Part I EnglandLondon London London Industrial Revolution Part I England
London Smog London is the capital of theLondon Smog London is the capital of the
2 nd International Conference on Fog and Fog2 nd International Conference on Fog and Fog
SMOG And its Environmental Effects History of SmogSMOG And its Environmental Effects History of Smog
FOG UPDATE STARTED PROGRAM IN 1991 ADOPTED FOGFOG UPDATE STARTED PROGRAM IN 1991 ADOPTED FOG
GOESR Fog Alerting Capability Shallow fog formed acrossGOESR Fog Alerting Capability Shallow fog formed across
See Through Fog Imaging Project P 06441 FogSee Through Fog Imaging Project P 06441 Fog
FOG UPDATE STARTED PROGRAM IN 1991 ADOPTED FOGFOG UPDATE STARTED PROGRAM IN 1991 ADOPTED FOG
NLP Introduction to NLP NLG Systems FOG FOGNLP Introduction to NLP NLG Systems FOG FOG
n void Ogre Scene Manager set Fog Fogn void Ogre Scene Manager set Fog Fog
FOG Fog is a cloud usually stratus thatFOG Fog is a cloud usually stratus that
Lights Fog Signals Buoyage Module Lights Fog SignalsLights Fog Signals Buoyage Module Lights Fog Signals
Smart Fog Fog Computing Framework for Telehealth BigSmart Fog Fog Computing Framework for Telehealth Big
Types of Fog Radiation fog generally forms whenTypes of Fog Radiation fog generally forms when
WELCOME TO FOG FOG meeting Pray time LetsWELCOME TO FOG FOG meeting Pray time Lets
AOSC 200 Lesson 14 Photochemical SMOG SMOG ChemistryAOSC 200 Lesson 14 Photochemical SMOG SMOG Chemistry
SMOG by Emre YAZICIOLU 1140 12 C SmogSMOG by Emre YAZICIOLU 1140 12 C Smog