Pollution : Hazard for mankind

Air Pollution

Created byVinay Arya

Last updated 3/2022

English

What you'll learn

The students will get a wide picture of Environmental Chemistry.
The students will learn about the matter found naturally in environment like Airosols, pollutants. etc.
The students will have a deep knowledge about the environmental pollution and the ways to reduce it..
The students will know about the importance of clean and fair environment.

Course content

1 section • 13 lectures • 3h 6m total length

14.1.Contents of Environmental11:42
Explore environmental chemistry concepts of pollution, including air, water, and land contamination, aerosols, sulfur oxides, acid rain, ozone layer, threshold limit values, and green chemistry.
14.2 Environmental Pollution13:17
This lecture on environmental pollution explains environmental chemistry and outlines environment components: atmosphere, hydrosphere, lithosphere, and biosphere, focusing on pollutants, their sources, sinks, and receptors.
14.3. Threshold limit value11:41
Explore threshold limit value as the permissible exposure limit for workers, learn how it is determined and applied to pollution from sources to sinks in the troposphere.
14.4. Types of Pollutants16:44
Explore primary and secondary air pollutants, including carbon monoxide, carbon dioxide, sulfur dioxide, and particulate matter, and learn how atmospheric reactions create secondary pollutants like ozone and sulfates.
14.5. Oxides of sulphur20:37
Explore how sulfur oxides form sulfur dioxide and sulfur trioxide, convert to sulfuric acid, and drive acid rain that corrodes marble and limestone from natural and industrial sources.
14.6. Particulates16:02
Define particulates as finely divided solid particles or liquid droplets suspended in air, and describe viable and non-viable types, their sources, and health, visibility, material, and plant impacts.
14.7. Control of Air Pollution20:52
Control pollution at source and disposal by reducing carbon monoxide, nitrogen oxides, sulfur dioxide, and particulates. Use cleaner fuels, engine improvements, catalytic converters, scrubbing, and electrostatic precipitators to curb smog.
14.8. Depletion of Ozone Layer10:48
Explore how the stratospheric ozone layer absorbs ultraviolet radiation and protects life, and how chlorofluorocarbons deplete ozone, creating holes and increasing ultraviolet exposure.
14.9. Chemistry of acid rain15:53
Explore the chemistry of acid rain formed from sulfur dioxide and nitrogen oxides into sulfuric and nitric acids, and its impacts on water, plants, monuments, and global warming.
14.10. Harmful effects of green house effect13:27
Explain how rising carbon dioxide and other greenhouse gases intensify the greenhouse effect, driving global warming, melting ice caps, rising sea levels, and reducing crop production.
14.11. Chemical Oxygen Demand (COD)10:25
Explore biochemical oxygen demand and chemical oxygen demand (BOD and COD), their role in assessing water pollution, how dissolved oxygen affects aquatic life, and wastewater treatment strategies.
14.12. Land Pollution13:12
Explore how land pollution, or soil pollution, arises from indiscriminate use of fertilizers and pesticides, and its effects on soil quality and crops.
14.13. Green Chemistry12:06
Green chemistry protects the environment by developing safer chemical products. Four strategies guide green chemistry: safer starting materials and solvents, efficient raw-material use, complete incorporation, and eco-friendly, economical alternatives.

Requirements

The child should have a clear concepts of System and Surroundings.

Description

In last 2 decades, the study of the phenomena related to the environment has gained enormous importance. Environmental pollution has becomes one of the most important issue of global concern. The branch of chemistry which deals with the study of various chemical phenomena occurring in the environment is called environmental chemistry. It is a must disciplinary science which, refer to the study of sources transport, reactions, effect & fate of certain chemical species on air, water & solid.

ENVIRONMENTAL POLLUTION

Environmental pollution may be described as the contamination of the environment with harmful wastes arising mainly from human activities. These activities release certain materials which produce pollution in the atmosphere, water & soil. The environmental pollution can be caused by Chemical agents (gases, pesticides, particulates) Physical agents (heat, noise, radiation) or Biological agents (micro – organisms) Pollution produces adverse effect on living as well as on non living materials. The effect of pollution are increasing at an alarming rate & if the same are not checked & controlled, they will pose a serious threat to human existence & habitat common terms to understand Problems of pollution are

Pollutant

Any substance or species produced either by a natural source or by human activity, which produces adverse effect on the environment is called pollutant.

CONTROL OF AIR POLLUTION

Air pollution can be checked either at source or at the dispersal stage of various pollutants. Although the Prob. of controlling air pollution at source is not easy, yet it can be reduced to some extent by taking steps such as, Use of appropriate raw materials, selection of proper sites for industrial units & use of modern techniques for efficient reduction of emission & effluents.

Different methods for the control of various air pollutants are as follows:

Control of CO

Some of the measures which can be adopted for control of CO pollution are:

(a) Use of anti pollution exhaust catalyst.

(b) Modification & improvement in internal combustion engine.

Who this course is for:

For the Beginners and students of twelfth and eleventh standards.