lec3 - MIT OpenCourseWare http:/ocw.mit.edu 1.020 Ecology...

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MIT OpenCourseWare http://ocw.mit.edu 1 .020 Ecology II: Engineering for Sustainability Spring 2008 For information about citing these materials or our Terms of Use, visit: http://ocw.mit.edu/terms .
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Lecture 08_3 Outline: Chemical Kinetics, Dechlorination Motivation/Objective Develop model to evaluate impact of source size and microbial degradation rates on time- dependent concentrations of chlorinated hydrocarbons (TCE and daughter products). System is open -- flowing water dissolves NAPL and transports dissolved constitiuents out of system. Approach 1. Define system (open), chemicals of interest (compartments). Identify unknowns (mass of non- aqueous liquid trichlorethene and concentrations of dissolved tricholorethene , dichlorethene , vinyl chloride , and ethane ). trinapl M tri C di C vc C eth C 2. Identify chemical reactions, write mass balance equation for each chemical (rate form) 3. Relate gain and loss terms in each balance equation to unknowns. 4. Specify inputs and solve the coupled mass balance eqs. for the unknowns (MATLAB).
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lec3 - MIT OpenCourseWare http:/ocw.mit.edu 1.020 Ecology...

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