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The value of the linear fit is very close to 1, indicating that the data can be modeled accurately using a linear relationship. Once the slope of the fitted line was known, we calculated the content of gas removed per liter of water sent through the sand filter using the formulas:

{latex}
$$
\frac{\Delta Volume}{\Delta Time} = slope * \pi * r _{collector} ^2
$$
{latex}

{latex}
$$
\frac{mL\:gas\:removed}{L\:water\:treated} = \frac{\frac{\Delta Volume}{\Delta Time}}{Q_{water}}
$$
{latex}

where the radius of the bubble column was 1.9 cm.

The calculations for the amount of gas removed during each data collection periods gave us the results summarized in Tables 2 and 3 below:

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