Question

correct statement about contaminant transport?

1. Advection refers to contaminant transport with flowing water.
2. Both diffusion and mechanical disperion are associated with concentration gradient.
3. Sorption refers to the process of contaminants sorbed to the solid phase.
4. Sorption process follows a linear sorption isotherm in the range of high concentration of contaminant.

Answer 1

1) True - Advection is a process of transportation of contaminants which is caused by the flow of groundwater in the subsurface .

2) True- Diffusion is a process of movement of partcles from a region of higher concentration to a region of lower concentration.

Mechanical Dispersion is a process of dilution of the contaminant water on mixing with the groundwater.

3)True-A process of one substance being attached to another sunstance is called Sorption , which is a chemical and a physical process. In contaminant transport, the contaminants get sorbed to solid phase sorbents like rock , soil etc .

4)False - In the range of high concentration of the contaminant , the process of sorption follows a nonlinear sorption isotherm .

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