Hey guys, can someone help me understand as to why the results are like this?
use a water and lead mixture to use as a synthetic Waste water and used water hyacinth to remediate the contaminant. My concern is that lead concentrations after the intervals are fluctuating most especially 1.36 ppm on the third testing where it increased by a little. Can someone explain why this happens or refer me some studies?
In analytical studies you are dealing with several different reasons for variability. First of all, sampling errors: it is sometimes difficult to taken real representative samples every time. Secondly: analytical errors which depend on the sample type and method used. These can substantial especially at levels near the detection limit of the method used. Thirdly: real differences caused e.g by evaporation of fluid or drying out of the solid sample. Differences in the third digit of a result are usually quite acceptable and also the second digit may differ.
Water levels did decrease due to evaporation and from the absorption of plants. However, when we did add water to the tub, it was not the synthetic wastewater but normal water.
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