A 1m clay wall separates two contaminants, A and B, dissolved in water. The diffusion coefficient of
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Question:
A 1m clay wall separates two contaminants, A and B, dissolved in water. The diffusion coefficient of contaminant A is D*= 2.3 x 10-9 m2 /s. After 3 years the two contaminants meet in the clay wall (i.e. the concentration of both contaminants is 50% of their source concentration at the same point.) Neglecting seepage velocity across the wall, determine where in the wall the contaminants meet and the diffusion coefficient of contaminant B.
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