Engy-5140: Chemical and Nuclear Waste Processing Fall 2019 UMass Lowell; Prof. V. F. de Almeida 28Oct2019
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¶Component | K-value | Groundwater (ppm) | EPA drinking water tolerance (ppm) | ($\mu$g/L) |
---|---|---|---|---|
1,2-Dichloroethane (DCA) | 60 | 85 | 0.005 | 5 |
Trichloroethylene (TCE) | 650 | 120 | 0.005 | 5 |
1,1,1-Trichloroethane (TCA) | 275 | 145 | 0.200 | 200 |
ppm is parts per million by mass (assume 1 ppm in water = 1 mg/L).
Component | A | B | H [atm m$^3$/mol]; T(K) |
---|---|---|---|
1,2-Dichloroethane (DCA) | -4.02 10$^3$ | 6.94 | $\ln H = \frac{A}{T} + B$ |
Trichloroethylene (TCE) | 1.14 10 | 4.78 10$^3$ | $H=\exp(A - \frac{B}{T})$ |
1,1,1-Trichloroethane (TCA) | 9.78 | 4.13 10$^3$ | $H=\exp(A - \frac{B}{T})$ |
Answers:
Design a trayed tower for the same flow rates used in Problem 1.
What is the efficiency of your tower?
Verify whether the concentratiosn of the VOCs in the water do meet the current EPA standards; show your source of information.
Discuss the toxicity of the VOCs according to your sources.
Would you consume the water from this water treatment you designed?
Answers: