Unit 2472: Environmental Chemistry

1. Introduction to Environmental Chemistry

• Definition and scope of environmental chemistry
• Chemical processes in natural environments (atmosphere, hydrosphere, lithosphere)
• Sources and types of environmental pollution: point vs. non-point sources
• Human activities impacting the environment
• Importance of environmental chemistry in sustainability

2. Air Pollution

2.1 Types of Air Pollutants

• Primary pollutants (e.g., CO, NOx, SO2, particulate matter)
• Secondary pollutants (e.g., ozone, smog formation)

2.2 Sources of Air Pollution

• Natural sources (volcanic eruptions, wildfires)
• Anthropogenic sources (industrial emissions, vehicular exhaust, agriculture)

2.3 Effects of Air Pollution

• Impact on human health (respiratory diseases, cardiovascular effects)
• Environmental effects (acid rain, ozone depletion, ecosystem damage)

2.4 Air Quality Monitoring and Control

• Air quality indices
• Monitoring techniques and instrumentation
• Pollution control strategies and technologies

3. Water Quality and Pollution

3.1 Sources of Water Pollution

• Industrial discharges
• Agricultural runoff (pesticides, fertilizers)
• Domestic sewage and urban runoff

3.2 Effects on Aquatic Ecosystems and Human Health

• Eutrophication and algal blooms
• Bioaccumulation and biomagnification of toxins
• Waterborne diseases

3.3 Water Quality Assessment and Management

• Physical, chemical, and biological water quality parameters
• Sampling and analysis methods
• Water treatment and pollution prevention measures

4. Soil Chemistry and Pollution

4.1 Soil Composition and Properties

• Mineral and organic components
• Soil pH, cation exchange capacity, nutrient content

4.2 Impact of Pollutants on Soil Quality

• Heavy metals, pesticides, hydrocarbons
• Effects on soil fertility and microbial communities

4.3 Soil Remediation Techniques

• Physical, chemical, and biological remediation methods
• Phytoremediation and bioremediation

4.4 Role of Soil Chemistry in Agriculture and Ecosystems

• Nutrient cycling
• Soil-plant interactions

5. Toxic Substances and Hazardous Waste

5.1 Classification of Toxic Substances

• Organic vs. inorganic toxins
• Persistent organic pollutants (POPs)

5.2 Environmental Behavior of Toxic Substances

• Transport, transformation, and fate in different media
• Bioavailability and toxicity mechanisms

5.3 Management of Hazardous Waste

• Identification and classification
• Safe handling, storage, and disposal methods

5.4 Regulations and Policies

• National and international frameworks (e.g., EPA, Basel Convention)
• Exposure limits and risk assessment

6. Green Chemistry

6.1 Principles of Green Chemistry

• Prevention of waste
• Atom economy
• Safer solvents and reaction conditions

6.2 Designing Environmentally Friendly Chemical Products and Processes

• Renewable feedstocks
• Energy-efficient synthesis

6.3 Applications and Case Studies

• Industrial adoption
• Benefits to environment and human health

7. Climate Change and Global Warming

7.1 Greenhouse Gases and Their Role

• CO2, CH4, N2O, fluorinated gases
• Sources and sinks

7.2 Impacts of Global Warming

• Environmental (melting ice caps, sea-level rise, extreme weather)
• Societal (health, agriculture, economy)

7.3 Mitigation Strategies

• Renewable energy
• Carbon capture and storage
• Policy measures

7.4 International Efforts

• UNFCCC, Kyoto Protocol, Paris Agreement
• Role of global cooperation

8. Environmental Analytical Techniques

8.1 Sampling and Sample Preparation

• Techniques for air, water, and soil

8.2 Chromatography

• Gas chromatography (GC)
• Liquid chromatography (LC)

8.3 Spectroscopy

• UV-Vis, IR, Atomic absorption spectroscopy (AAS)

8.4 Mass Spectrometry

• Principles and environmental applications

8.5 Applications in Environmental Monitoring and Research

• Detection of pollutants
• Data interpretation and reporting