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Page 1: Introduction
- Dr. Hafiz Omer Ahmed
- PhD, MSc, BSc
- Management of Hazardous Wastes
- Department of Environmental Health Science
- College of Health Sciences
- Spring 2024 - 2025
Page 2: Course Description
- This course enables students to understand:
- Types of Hazardous Wastes
- Sources of Hazardous Wastes
- Processes Related to Hazardous Waste:
- Collection
- Transfer
- Disposal
- Management Strategies: Overview of various hazardous waste management strategies.
Page 3: Work Environment
- Definition: Work environment refers to employer's premises and locations of work-related activities.
- Types of Work Environments:
- Factory
- Hospital
- Laboratory
- School
- Office
- Home
Page 4: Safety and Hazard
- Safety: Protection from danger or accidents.
- Hazard: Defined as a factor or exposure adversely affecting health; a source of danger.
Page 5: Toxicity and Risk
- Toxicity:
- Ability of a substance to cause unwanted effects at sufficient concentration in the body.
- Risk: Probability of an event occurring.
- Formula: RISK = Hazard X Exposure
Page 6: Ecosystems
- Definition:
- Community of living organisms (plants, animals, microorganisms) interacting with their non-living environment (e.g., air, water, soil, climate).
- Key Aspects:
- Energy and nutrient transfer through ecological processes for survival.
Page 7: Examples of Ecosystems
- Forest Ecosystem
- Components: Trees, shrubs, animals (deer, foxes, insects), microorganisms, soil.
- Example: Amazon Rainforest
- Aquatic Ecosystem
- Components: Water bodies, aquatic plants, fish.
- Example: Coral Reefs
- Desert Ecosystem
- Components: Sparse vegetation, animals adapted to aridity.
- Example: Sahara Desert
Page 8: Environmental Health
- Definition 1:
- Effects of the environment on health (WHO 1993).
- Theory and practice of assessing, controlling, and preventing environmental factors affecting health.
- Definition 2:
- Study of how environmental factors can harm health and measures for control and prevention.
Page 9: Environmental Health Services
- Services include:
- Implementation of environmental health policies through monitoring and control.
- Promotion of improvements in environmental parameters.
- Development and suggestion of new policy areas.
Page 11: Environmental Sciences
- Multidisciplinary field studying interactions between physical, chemical, and biological components of the environment.
- Focus on ecological systems, biodiversity, climate change, and resource management.
Page 12: Collaboration in Environmental Fields
- All three fields aim to minimize environmental harm.
- Example: Water Quality Management
- Environmental Health: Monitors water safety
- Environmental Engineering: Designs treatment plants
- Environmental Sciences: Studies ecosystems
Page 13: Air Pollution Control
- Collaboration Example:
- Environmental Health: Studies health impacts of pollutants
- Environmental Engineering: Develops pollution control technologies
- Environmental Sciences: Investigates sources and effects
Page 14: Systematic Approach to Environmental Hazards
- Involves systematic identification, assessment, control, and monitoring of hazards.
- Steps Include:
- Identification of Environmental Hazards
- Risk Assessment
- Control Measures
Page 15: Systematic Approach Continued
- Additional Steps:
- Monitoring and Evaluation
- Communication and Training
- Emergency Preparedness
Page 17: Definition of Solid Wastes
- General Definition:
- Refers to unwanted or discarded solid/semi-solid material from human activities.
- Key Points:
- Origins: Residential, industrial, commercial, agricultural, institutional.
- Requires proper management to minimize impacts.
Page 18: EPA Definition of Solid Wastes
- Solid waste as defined by the Resource Conservation and Recovery Act (RCRA) includes:
- Garbage, refuse, sludge, discarded materials from various operations.
Page 20: Resource Conservation and Recovery Act (RCRA)
- Enacted in 1976 to govern management and disposal of solid and hazardous waste.
- Aims:
- Reduce waste generation
- Conserve resources
- Ensure safe waste management
Page 26: Definitions of Hazardous Wastes
- Varies by organization; often emphasizes specific properties and regulatory criteria.
- Most widely recognized is the RCRA (1976).
Page 27: EPA Definition of Hazardous Waste
- Defined as waste with characteristics that pose dangers to health/environment.
- These include: ignitability, corrosivity, reactivity, toxicity.
Page 28: UNEP Definition of Hazardous Wastes
- Refers to wastes that are toxic, flammable, reactive, corrosive, infectious, or radioactive.
Page 29: EU Definition of Hazardous Wastes
- Waste that displays hazardous properties listed in Directive 2008/98/EC, such as explosiveness and flammability.
Page 30: WHO Definition of Hazardous Wastes
- Waste that is infectious, toxic, flammable, reactive, or poses significant health/environmental risks.
Page 31: OSHA Definition of Hazardous Waste
- Includes substances that are ignitable, corrosive, reactive, or toxic, focusing on worker safety.
Page 33: RCRA Criteria for Hazardous Waste
- Establishes criteria based on whether waste is listed by EPA or exhibits hazardous characteristics.
Page 34: RCRA Listed Wastes
- F-List: Non-specific source wastes from common industrial processes.
- K-List: Specific source wastes from particular industries.
- P-List and U-List: Discarded commercial chemical products (P-List acutely toxic, U-List toxic).
Page 39: Characteristic Wastes
- Classified as hazardous if they exhibit ignitability, corrosivity, reactivity, or toxicity.
Page 40: Ignitability
- Ignitable Liquid: Flashpoint <60°C(140°F).
- Ignitable Non-Liquid: Solids that can spontaneously ignite.
- Ignitable Compressed Gas: Gases meeting DOT criteria for ignitability.
Page 47: Corrosivity
- Waste exhibiting pH ≤ 2 or ≥ 12.5, or corrosion rate > 6.35 mm/year.
- Significance: Risks include chemical burns, soil contamination, and infrastructure damage.
Page 51: Reactivity
- Properties that make waste hazardous include instability, violent reactions with water, or explosive mixtures.
Page 53: Toxicity
- Waste leaching harmful concentrations of toxins into groundwater, assessed via TCLP (Toxicity Characteristic Leaching Procedure).
Page 54: Universal Wastes
- Hazardous wastes with streamlined regulations due to widespread generation (e.g., batteries, electronic devices).
Page 56: Importance of Hazardous Waste Classification
- Ensures safe management protecting health/environment, prevents regulatory penalties and environmental harm.
Page 57: Conclusion on RCRA
- Defines hazardous wastes' impact on health and environment; specifies conditions under which waste could elevate health risks.
Page 58: Identification of Hazardous Wastes
- Process to determine if a material is hazardous.
- Purpose: Regulatory compliance under RCRA.
Page 62: Classification of Hazardous Wastes
- Categorizing hazardous wastes into groups based on origin, composition, or regulatory criteria.
Page 65: Characterization of Hazardous Wastes
- Detailed analysis of waste properties for safe handling and compliance.
Page 68: Summary of Differences
- Identification vs Classification vs Characterization:
- Focus: Determining hazardous status | Grouping for management | Analyzing detailed properties.
- Methodology: Regulatory criteria | Lists | Laboratory analysis.
- Outcome: Hazardous or Non-Hazardous | Waste category | Detailed waste profile.