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Hazardous Materials HAZMATs

Learn about hazardous materials (HAZMATs), including their risks, regulations, and management. Explore different types of hazardous materials such as ignitable, corrosive, reactive, and toxic chemicals. Discover the Toxic Release Inventory and the Product Life Cycle Fate of Toxins. Understand the impact of heavy metals and synthetic organics, and the challenges in dealing with toxic chemical waste. Explore various waste management methods and learn about major hazardous waste laws.

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Hazardous Materials HAZMATs

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  1. Hazardous MaterialsHAZMATs • Chemicals That Present Hazard or Risk • Ignitability: catch fire readily; gasoline • Corrosivity: may corrode storage tanks (e.g. acids) • Reactivity: unstable and may explode or create toxic fumes when mixed with water; explosives, concentrated sulfuric acid • Toxicity: injurious to health; pesticides, chlorine

  2. Toxics Release Inventory • Emergency planning and community right-to-know act (EPCRA) 1986; • Industries must report locations and quantities of toxic chemicals stored on site and releases of toxic chemicals: • Inventory results from 1996: • 722,000 tons of toxic chemicals released to the air • 86,500 tons of toxic chemicals released to the water • 11,702,500 tons of hazardous wastes resulting from production of goods • 1,066,000 tons of toxic chemicals released to the environment • 1,600,000 tons of toxic chemicals from household hazardous wastes

  3. Product Life Cycle

  4. Fate of Toxins • Many are broken down by natural processes • Two types persist in the environment • Heavy metals • Synthetic organics

  5. Heavy Metals • Lead, mercury, arsenic, cadmium, tin, chromium, zinc, copper. • Used in metal-working, paint, and pesticides, among other products • Soluble in water and readily absorbed by body. • Interfere with enzyme function. • Example: mental retardation from lead poisoning.

  6. Synthetic Organics • Chemical basis for plastics, synthetic fibers and rubber, solvents, and pesticides. • Resistant to biodegradation. • Major health effects: carcinogenic and mutagenic. • Halogenated hydrocarbons

  7. Toxic Chemical Waste Problems • Cleaning up old wastes • Managing new wastes • Avoiding future wastes

  8. Deep-well Injection

  9. Surface Impoundments

  10. Landfills

  11. How Super Is The Superfund? • Advanced cleanup technology • Incineration to burn off contaminants in soil • Cleaning soil with detergent • Bioremediation • Phytoremediation • Brownfields • Costly and slow

  12. Major Hazardous Waste Laws

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