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class1_w08 - Chemistry and Biochemistry 123 Environmental...

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    Chemistry and Biochemistry 123 Environmental Chemistry What is environmental chemistry? The environmental revolution Environmental science and environmental policy
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    Environmental Chemistry
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Twelve Principles of Green Chemistry 1. Preventing waste is better than cleaning up the mess later This is the Cardinal Principle Embodied in: Pollution Prevention Act of 1990 (PPA) As distinguished from: “end-of-the-pipe” laws Though the PPA is aspirational, so largely toothless. Speaks to voluntary reductions in environmental impacts by companies Assists from Environmental Protection Agency (EPA) Programs
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Twelve Principles of Green Chemistry Most of the principles focus on synthetic feedstocks and products formed 2. Maximize incorporation of all inputs, into the final product -eliminate all unnecessary by-products -use the principle of “atom economy” as a metric to assess the efficiency of a reaction: (M r incorporated into product / M r total reactants) 1. Employ reactants and products with the least possible toxic effects to humans and the environment 1. Preserve efficacy of function while reducing toxicity 1. Minimize the use of auxiliary substances (solvents, separation agents, etc) and make them innocuous if they must be used
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Twelve Principles of Green Chemistry 1. Use renewable feedstocks
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class1_w08 - Chemistry and Biochemistry 123 Environmental...

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