Sustainable Science: Green Chemistry in your Classroom : Sustainable Science: Green Chemistry in your Classroom
Slide2 : WMRC
Slide3 : Green Chemistry: Preventing Pollution Sustaining the Earth
Slide4 : No human activity is completely risk-free Use common sense,
Use chemical sense, and
Follow the rules of lab safety.
Risk = f(hazard,exposure) : Risk = f(hazard,exposure) Do we consider our level of exposure and the hazard itself?
Does the dose makes the poison?
Safety first… and last : Safety first… and last Use nontoxic/nonhazardous starting materials
Use common sense
Slide7 : Principles of Green Chemistry Waste Prevention
Atom Economy
Safer Solvents
Energy Efficiency
Renewable Feedstocks
Design for Degradation
Slide8 : Wastes? Why make them? Design experiments to
reduce or eliminate waste.
Incorporate materials used in a
process into the final product.
Law of Conservation of Matter : Law of Conservation of Matter Matter cannot be created or destroyed.
A candle burns and appears to be destroyed, but..turns into less observable gas (a byproduct).
Slide10 : Atom economy in the real world: Ibuprofen
Ibuprofin synthesis : Ibuprofin synthesis Prior to 1990s each step produced waste and had 40% atom economy
Now atom economy is around 77%
(ideal is 100%) with much less waste.
Slide12 : Talking Trash – What Color is your Waste? Green! Do you know where your product is?
Bioremediation (microbial-based cleaning system)
Strategies for reducing waste : Strategies for reducing waste Reduce
Reuse
Recycle
Rebuy
Rethink
Use safer solvents for chemical processes : Use safer solvents for chemical processes Return safe substances to the environment
Design for biodegradability
Eliminate the use of toxic solvents to dissolve reacting materials
Clock Reaction : Clock Reaction Sudden, sharp change when
reaction is complete.
“Greener” way to demonstrate
reaction rate.
Slide16 : Soaps, Crystals, and Dirt Using safer solvents
Investigating solubility &
surfactants
Using Renewable Resources : Using Renewable Resources A sticky solution: Making glue from milk!
Slide18 : Use Less Energy Use lower amounts of energy for chemical processes
Use catalysts (like enzymes) or microwave to speed up reactions
Green Chemistry means... : Green Chemistry means... Preventing pollution before it happens rather than cleaning up the mess later.
Slide20 : Green Chemistry Curriculum supplemental course materials,
activities and information
references and resource materials
Green Chemistry lessons at www.greeningschools.org : Green Chemistry lessons at www.greeningschools.org Green Your Lesson Plan
Select “Green Chemistry” under Chemistry category
Filter for classroom lessons
Slide22 : Carol Knepp
Waste Management & Research Center
cknepp@wmrc.uiuc.edu
217-244-5637