Concentration of copper absorbed by P. hederaceum
Table 1.1 shows the concentration of the heavy metal absorbed by P. hederaceum at different time durations. The absorption of copper significantly increased as the exposure of the plants to the aqueous solution increased. The lowest amount of absorption happened in the first 24 hours of phytoremediation on all three plant samples, with 1.3345 ppm being the minimum. This indicates that the plant that was subjected to the solution for 24 hours was the least ineffective in absorbing the heavy metal. However, the plant samples on the 6th day had a relatively higher absorption than the 9th day of phytoremediation. It implies that the absorption of copper was more effective in the six days of phytoremediation on the two plant samples in comparison to its results in the nine days of the experiment. Most importantly, it can be inferred from this table that the highest amount of copper absorbed was observed on the 15th day of phytoremediation, with its maximum amount absorbed at 13.6134 ppm. Furthermore, the results of the experiment share an identical outcome with the previous study by Swain et al. (2014) using E. crassipes as its accumulator. The highest concentration absorbed in the mentioned study was obtained after 25 days, which is its maximum day interval.
DESCRIPTIVE STATISTICS
Table 1.2 displays the basic datasets that are found in the study. This table shows the measures of the samples in the three trials they were treated. This study aims to see if P. hederaceum can filter copper-based wastewater. The samples were subjected to three trials to ensure the quality and consistency of the data. Based on the table, the highest mean of copper concentration with respect to time is noticed on the plants that were treated for 15 days and the lowest for the plants that were treated for 24 hours. However, the plants that were treated for 6 days had a significant difference from those that were treated for 9 days. The plants that were treated for 15 days also had a greater dispersion of data in relation to its mean than the rest as seen in the table. However, the plants that were treated for 15 days had the greatest standard error among the rest. The data reveals a pattern that plant adsorption improves with longer treatment times. This shows a significant difference — therefore, the null hypothesis is rejected.