1) Design a model for a wetland of known dimensions through which waste water flows from left to right, assuming that the system behaves as a PFR. Assume that the degradation of chemicals -such as atrazine- follows irreversible first-order homogeneous kinetics, and that part of the waste water evaporates from the surface as it flows along the wetland. Obtain an equation that represents the molar flow of toxic substances (FA) as a function of distance (z). Consider that evaporation occurs on the wetland's top surface area at a constant rate (Q = kmol water / hr*m2) and that none of the toxic chemicals are lost to the air by evaporation.
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The initial conditions given for this case are:
2) Now that you have come up with a functional model, use Polymath to find out what the molar flow of atrazine, FA, would be at z = 100 m and at z = 1000 m?
3) Plot your results with three different variations: conversion (x) as a function of distance, molar flow of atrazine (FA) as a function of distance, and reaction rate (rA) as a function of distance.