ENVI 405 Lecture Notes - Lecture 7: Sustainable Development, Organic Compound, Chemical Oxygen Demand
3. No universal definition
Sustainable development
Development that meets the needs of the present without compromising the ability of future
generations to meet their own needs
Social factors
1. is the product valued and used?
2. community support?
3. social justice?
Economic factors
1. Cost vs. market value
2. Jobs and income trends
Environmental factors
1. Impact on water, air, land
2. Impact on species
3. Energy use
Do less developed regions have a higher or lower population?
Higher population
Population of the world?
7.4 billion
Population of the USA?
326 million
Environmental engineers
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People who use engineering, chemistry, microbiology, and other things to solve environmental
problems
Ideal gas law
PV=nRT
Steady state
in=out
Conservative chemical
no reaction
Batch system
systems that have no flow in or out
Non-flow reactor
Batch
Flow reactors
Plug flow reactor (PFR)
Continuous stirred tank reactor (CSTR)
What is the visible spectrum?
400nm - 700nm
Do shorter or longer UV rays cause cancer?
shorter UV rays
Black is the most perfect _______ & _________
emitter & absorber
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Carbon dioxide in the atmosphere absorbs what kind of energy?
infrared energy
Energy from the sun passes through the atmosphere and hits the earth at what spectrum?
0.6 micrometers
Energy from the earth is reemitted into the atmosphere at what spectrum?
10 micrometers
Fluorescence
Chemical will absorb energy at one wavelength and emit energy at a different wavelength
Excitation wavelength
wavelength that is absorbed
Emission wavelength
wavelength that is emitted
Beer's Law
relates the attenuation of light to the properties of the material through which light the light is travelling
A=εCL
Organic vs inorganic molecules
organic molecules contain carbon excluding carbonate systems, CO, C and a few others.
inorganic are everything else
Oxidation
lose an electron
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Document Summary
Development that meets the needs of the present without compromising the ability of future generations to meet their own needs. Economic factors: cost vs. market value, jobs and income trends. Environmental factors: impact on water, air, land, impact on species, energy use. People who use engineering, chemistry, microbiology, and other things to solve environmental problems. Batch system systems that have no flow in or out. Do shorter or longer uv rays cause cancer? shorter uv rays. Black is the most perfect _______ & _________ emitter & absorber. Carbon dioxide in the atmosphere absorbs what kind of energy? infrared energy. Chemical will absorb energy at one wavelength and emit energy at a different wavelength. Beer"s law relates the attenuation of light to the properties of the material through which light the light is travelling. Organic vs inorganic molecules organic molecules contain carbon excluding carbonate systems, co, c and a few others. inorganic are everything else.
