GE6351 EVS Notes, Environmental Science & Engineering Lecture Notes – IT 3rd SEM Anna University


Anna University Regulation 2013 Information Technology (IT) GE6351 EVS Notes for all 5 units are provided below. Download link for IT 3rd SEM GE6351 Environmental Science & Engineering Lecture Notes are listed down for students to make perfect utilization and score maximum marks with our study materials.

3.1 Introduction
Environmental pollution can be defined as “the unfavorable alteration of our surroundings”
3.1.1 Types of pollutants
1. Bio degradable pollutants-decompose rapidly by natural processes.
2. Non-degradable pollutants-do not decompose or slowly decompose in the environment.
3.1.2 Classification of Pollution 
Air pollution 
 Soil pollution 
Marine pollution 
Noise pollution 
Thermal pollution and  Nuclear hazards
The presence of one or more contaminants like dust, smoke, mist and odour in the atmosphere which are injurious to human beings,plants and animals.
3.2.1 Sources of air pollution
Natural pollution-volcanic eruptions, forest fires, biological decay.
Man–made activities–Thermal power-plants, agricultural activities.
3.2.2 Classification 
Primary pollutant–these are those emitted directly in the atmosphere in harmful form like CO, NO. 
Secondary pollutant–these may react with one another or with the basic components of air to form new pollutants.
3.2.3 Control Measures
1. Source control 
Use only unleaded petrol 

Use petroleum products and other fuels that have low sulphur and ash content 
Plant trees along busy streets because they remove particulates and carbon monoxide and absorb noise.
Industries and waste disposal sites should be situated outside the city centre. 
Use catalytic converters to help control the emissions of carbon monoxide and hydrocarbons.
2. Control measures in Industrial center Emission rates should be restricted to permissible levels  Incorporation of air pollution control equipment in the design of the plant lay out.

GE6351 EVS Unit 1 notes  Download Here

GE6351 EVS Unit 2 notes  Download Here

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