Subject Code & Name: EO25C01 – Environmental Chemistry
Regulation: R-2025
Semester: III (Third Semester)
Branch: B.E. Environmental Engineering (Env) / B.E. Civil Engineering (Environmental Engineering) (Civil(Env))
Credits / L-T-P: 4 Credits | L-T-P: 3-0-2
Course Objectives
- To provide students with fundamental and applied knowledge of chemical processes occurring in air, water, and soil environments, with emphasis on pollution control, emerging contaminants, and sustainable chemical practices.
Full Unit-wise Syllabus
Unit I – Chemical Fundamentals
Stoichiometry, mass balance, equilibria, acid–base reactions, solubility product, carbonate system, ocean acidification, kinetics, and green chemistry principles.
Practical: 1. Estimation of total hardness and chloride in water using volumetric titration.
Unit II – Aquatic Chemistry
Water quality parameters and fate of chemicals through volatilization, partitioning, and degradation. Metal speciation, redox reactions, pE– pH diagrams, sorption, colloids, coagulation, and bioavailability.
Practical: 2. Determination of sulphate and phosphate concentrations; 3. Analysis of total, dissolved, and suspended solids.
Unit III – Atmospheric Chemistry
Atmospheric structure and reactions, photochemical smog, ozone depletion, greenhouse gases, global warming, carbon capture, acid rain, particulates, and air quality parameters.
Practical: 4. Determination of Chemical Oxygen Demand (COD).
Unit IV – Soil Chemistry
Soil composition, clay minerals, cation/anion exchange capacity, acid–base and ion-exchange reactions. Soil contamination, heavy metals, POPs, endocrine disruptors, and nanomaterials.
Practical: 5. Determination of Biochemical Oxygen Demand (BOD)
Activities: 1: Collect and analyze a water sample for hardness, chloride, sulphate, phosphate, and solids (TS, TDS, TSS). Interpret results using chemical principles (equilibria, solubility, speciation) and evaluate suitability for drinking or environmental use. 2: Determine COD and BOD of a wastewater sample and assess pollution levels. Relate findings to aquatic chemistry, biodegradation, and environmental impact, and suggest appropriate treatment methods. 3: Investigate a real-world issue involving air or soil pollution (e.g., heavy metals, POPs, or greenhouse gases) and propose mitigation strategies.
Course Outcomes (COs)
- CO1: Explain chemical principles governing air, water, and soil systems.
- CO2: Analyze chemical processes influencing pollutant behavior and environmental quality.
- CO3: Evaluate pollution control methods and sustainable chemical practices.
- CO4: Apply environmental chemistry concepts to real world problems and emerging contaminants.
Assessment Pattern (Quick Note)
- Weightage: Continuous Assessment 50% | End Semester Examinations 50%
- Internal methodology: Quiz (5%), Project (15%), Assignment Programs (25%), Practical (25%), Internal Examinations (30%)
Source: Official Anna University – B.E. Environmental Engineering R-2025 Curriculum
Last Updated: September 2026
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