Dispersion of Pollutants and Environmental Impact Assessment

Course Information
TitleΔιασπορά Ρύπων- Αξιολόγηση περιβαλλοντικών επιπτώσεων / Dispersion of Pollutants and Environmental Impact Assessment
SchoolChemical Engineering
Cycle / Level2nd / Postgraduate
Teaching PeriodSpring
Course ID600018399

Programme of Study: GSP CHEMICAL AND BIOMOLECULAR ENGINEERING (2018-until now)

Registered students: 5
OrientationAttendance TypeSemesterYearECTS
Energy-EnvironmentCompulsory Course belonging to the selected specialization (Compulsory Specialization Course)217

Class Information
Academic Year2019 – 2020
Class PeriodSpring
Faculty Instructors
Weekly Hours3
Class ID

Class Schedule

FloorFloor 2
HallΑΙΘΟΥΣΑ 309 (44)
CalendarWednesday 14:00 to 17:00
Course Category
Knowledge Deepening / Consolidation
Mode of Delivery
  • Face to face
Digital Course Content
Learning Outcomes
They will be able to estimate the concentration of a toxic gas dispersion in air, as a function of position and time, and consequently evaluate its effects on humans and materials. Propose safe zones.
General Competences
  • Apply knowledge in practice
  • Adapt to new situations
  • Make decisions
  • Work in teams
  • Work in an international context
  • Work in an interdisciplinary team
  • Respect natural environment
  • Be critical and self-critical
Course Content (Syllabus)
C5.1. Types of Toxic Gases 213 C5.1.1. Toxic Gases from Industrial Accidents 213 a) Seveso, Italy, 1976 214 b) Bhopal, India, 1984 214 C5.1.2. Toxic Gases in Terrorist Actions 215 a) Nerve Agents 215 b) Choking Agents 217 c) Blister Agents 217 d) Blood Agents 217 e) Tear Agents 218 f) Vomiting Agents 218 g) Incapacitating Agents 218 C5.2. Introduction to Cloud Dispersion 219 C5.2.1. Meteorological Conditions 219 a) Air Circulation 219 b) Atmospheric Stability 221 c) Wind Speed 223 d) Temperature Inversion 223 C5.2.2. Dispersion Models 225 a) Empirical Models 225 b) Lagrangian Models 226 c) Eulerian Models 226 C5.2.3. Selection of Gaussian Model for Light Gas Dispersion 227 C5.2.4. Selection of Empirical Models for Heavy Gas Dispersion 228 C5.3. Light Gas Dispersion from Continuous Source 229 C5.3.1. Plume Rise 229 a) Plume Rise Due to Buoyancy or Momentum 230 b) Distance of Maximum Plume Rise 231 c) Gradual and Final Plume Rise 232 C5.3.2. Dispersion Equation 235 a) Concentration Equation 236 b) Dispersion Coefficients 238 C5.3.3. Chemical Deposition Mechanism 242 C5.4. Light Gas Dispersion from an Instantaneous Source 243 C5.4.1. Puff Rise 243 C5.4.2. Dispersion Equation 246 a) Concentration Equation 246 b) Dispersion Coefficients 247 c) Mean Wind Speed 247 d) Puff Arrival and Departure Time 248 C5.5. Heavy Gas Dispersion 253 C5.5.1. Heavy Gas Dispersion from a Continuous Source 255 C5.5.2. Heavy Gas Dispersion from an Instantaneous Source 259 C5.6. Dispersion of Solid Particles (e.g., ΡΜ10) 263 C5.7. Effects of Toxic Gas Dispersion 265 C5.7.1. Toxic Exposure Limits 265 a) LC50 (Lethal Concentration 50) 267 b) LC1 (Lethal Concentration 1) 268 c) LD50 (Lethal Dose 50) 268 d) IDLH (Immediately Dangerous to Life and Health) 270 e) LOC (Level of Concern) 271 f) PEL (Permissible Exposure Level) 271 C5.7.2. Special Atmospheric Pollutants Limits 273 C5.7.3. Risk Zones 274 C5.8. Examples 275 C5.8.1. Case Study: Toxic Gas Emissions at the City of Kamini 275 C5.8.2. Major Industrial Accidents Caused by Toxic Gas Dispersion 279
toxic gas dispersions
Educational Material Types
  • Multimedia
  • Interactive excersises
  • Book
  • court cases
Use of Information and Communication Technologies
Use of ICT
  • Use of ICT in Course Teaching
  • Use of ICT in Laboratory Teaching
software locally developed in Authorware
Course Organization
Interactive Teaching in Information Center70
court cases30
Student Assessment
1) written 4 exams 2) presentation in groups of specific accident in virtual court case
Student Assessment methods
  • Performance / Staging (Formative)
  • Written Exam with Problem Solving (Formative)
Course Bibliography (Eudoxus)
Μ.Ι. Ασσαελ, Κ. Κακοσίμος, "Ανάλυση Επικθνδυνότητας. Εγχειρίδιο Υπολογισμού Επιπτώσεων απο Φωτιές, Εκρήξεις, και Διασπορα Τοξικών Ρύπων", Εκδόσεις Τζιόλα Θεσσαλοίκη (1997) - 372 σελίδες
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