5. Conclusion

As the experiment has come to its end, we concluded that water plants such as Eichhornia crassipes are able to absorb pollutants in the water. However, some water plants may not be able to absorb a certain amount of pollutants and one has to make sure that the water plant is able to absorb pollutants before official implementation. Our hypothesis was proven wrong due to the fact that water plants only absorb higher amount of salt due to the concentration of the salt levels in the water. Results can be differ by the concentration of the salt in the water. 

Our hypothesis was that if we add less salt into the water, then the water plants will be able to absorb the salt better and the salinity level will drop significantly after 5 days. My results do not support my hypothesis.

The test that was conducted went smoothly and we had not a significant amount of problems. One of the problems we faced was that the water evaporate due to the environment around it, thus affecting the result. We have overcome it by putting a layer of wrap around the cover of the set-up.

We can continue to put this experiment for future study by putting it in real life environment and put in different plants species to test the difference it make to the set-up.

4.1 Practical Applications 

We can apply the knowledge that we have attained in the polluted waters of Singapore. Due to the large amount of water pollution in Singapore, these plants can be used to clean up the waters of Singapore. Clean water would lead to a clean and healthy environment which results in the good health of the citizens of Singapore. These plants can be used rather than using machinery and technology to absorb pollutants.

4.2 Areas for further study

As we have found out about certain plants that are able to decrease the level of salt concentration in the water, it forms a new question of asking whether that all the water plants are able to decrease the salinity levels.

Everything that we have done are conducted in a lab, thus making it not the same situation as a real life set-up. We should try to put it in a real life set-up thus it would be able to help us find out the results in a real life scenario.

We could also try to Introduce new species of organisms like aquatic animals or other water plants in the set-up as it could make a difference in the results of our experiment.

4.3 Comparisons with previous research


Both experiments required the use of a salinity meter for the measurement of the salt concentration.

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