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DEFINITION OF GREEN OR SUSTAINABLE CHEMISTRY • An approach to design, manufacture and use of chemical products to deliberately reduce or eliminate the chemical hazards and protect the environment. Basic Principles of Green Chemistry • 12 principles advocated by Dr. Paul Anastas and Dr. John Warner. 1. Prevention 2. Atomic Economy 3. Less Hazardous Chemical Synthesis 4. Designing Safer Chemicals 5. Safer Solvents and Auxiliaries 6. Design for energy efficiency 7. Use of Renewable Feedstocks 8. Reduce Derivatives 9. Catalysis 10. Design for Degradation 11. Real –Time analysis for Pollution prevention 12. Essentially Safer Chemistry for Accident Prevention 1. Prevention • It is better to prevent waste than to treat or clean up waste after created it. • So, waste prevention is better than waste cleanup. Environmental Disasters • Love Canal In Niagara Falls, NY a chemical and plastics company had used an old canal bed as a chemical dump from 1930s to 1950s. The land was then used for a new school and housing track. The chemicals leaked through a clay cap that sealed the dump. It was contaminated with at least 82 chemicals (benzene, chlorinated hydrocarbons, dioxin). Health effects of the people living there included: high birth defect incidence and seizure-inducing nervous disease among the children.
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