Mean Concentration Graph


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Analysis

Analysis The Graph shows that the mean concentration for each heavy metal considered in the graph is greater when the depth is less. Therefore, at a depth of 0-50 cm the concentration is, on average, higher. This makes sense because the metals enter the pond as a result of external, surrounding factors. They may continue to float at the top of the pond before possibly going off into the silver stream. This results in the surface of the pond to have a greater concentration of the heavy metal sediments. Additionally, the water goes through the outer drain and ultimately enters Lake Waban. This could mean that the sediment at the bottom of Paramecium Pond could travel towards Lake Waban. This would essentially decrease the concentration of the heavy metals at a greater depths.
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Bulleted List of Analysis, to go before conclusion

Analysis Different heavy metals showed variable concentrations both throughout the pond system and into the pond’s core. The different trends suggest that these metals were likely deposited from different sources and through different processes. Manganese and Iron Higher concentration at Silver Thread source shows these metals may be externally sourced and cannot travel farther downstream High levels of manganese (above 0.05 mg/L) can cause a bad taste in water which may discourage animals from using Paramecium Pond as a drinking source Zinc, Copper, Chromium Concentration also higher at Silver Thread source, trends diverge in rest of system Could be product of runoff or specifically from college road Likely sourced from Paintshop Pond Paintshop Pond is contaminated with toxins and heavy metals due to dumping of paint factory waste from 1848-1920 Likeliest source of zinc , copper , and chromium in Paramecium Pond Heavy metals found in the pond an...
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