|
Explore TEAMS!
|
EnvBio /
Project1Officially non-official page of: Mark Troutt Amber Stangroom Richard Tia and Wilnely Rivera Phosphorus Remediation Of Various Water Samples Using Duckweed PosterIf you post anything online for this, you must put it in the power point YOURSELF in the appropriate spots. MARK. Ok, ok. Sorry. I'm adding them now. I was just getting my shoes back... Wilnely, if you resave the files they should work. You also uploaded your files wrong. In the first part of the bracket you have to have the exact file name and the extension. Check my edit to see what I did. Assignments
Amber's Portion - ConclusionsOnly the pond water sample showed a significant decrease in phosphorous levels. All of the other samples showed an increase in the amount of phosphorous. There could be several reasons for this. One explanation is that the caps on the BOD bottles were too tight and no air could get in, disrupting normal gas exchange. That would cause the duckweed to die and release phosphorous. Another reason why only the pond water showed positive results could be because the duckweed was raised in the pond water and became adapted to its specific oxygen and nutrient levels. This could cause it to flourish in the pond sample and die in the tap and well water. Also, some human error could have caused the results. A pond water sample had to be thrown out because the device used to filter out the duckweed had a backup of tap water which mixed with the sample. The same thing could have happened to our other samples without being noticed.
There are several things that could be done to improve the experiment. If all the bottles had the same number of duckweed plants in them instead of an approximation, the data would have been more accurate. It might also be good to use a different device to seperate out the duckweed from the water samples to eliminate contamination problems. Of course, more samples and more sources would have given a broader set of data.
Richard's Portion - ResearchQ3The effectiveness of duckweed on removing phosphorous from wastewater has already been invesitigated. From these investigations, duckweed was found to be effective in removing many types of nutrients (including phosphorous) from wastewater. Duckweed is currently being used in many wastewater treatment plants to remove nutrients and control algae levels in wastewater. Compared to other mechanical and chemical ways of removing nutrients from wastewater, the use of duckweed is fairly inexpensive and easy.
Q8Based on the research i found by other people on this subject; our results after the experiment disagreed with that of the other people, who performed a similar experiment using duckweed. In our experiment, the phosphorous levels of the different water samples were raised after the duckweed was left in them for a few days, while in other experiments the phosphorous levels were lowered after. There are many different possibilities for why our results disagree with others. One reason could be that we closed the bottles too tight on the BOD bottles, resulting in the death of the duckweed, making them release the absorbed phosphorous. Another reason could be from experimental error because tap water was accidentally backed up into at least 1 of our samples when we tried to filter out the duckweed.
Q8 is similar to the conclusion, so you can change it a bit to make it more together ~~richard.
Modified Section for posterOnly the pond water sample showed a significant decrease in phosphorous levels. All of the other samples showed an increase in the amount of phosphorous. There could be several reasons for this. One explanation is that the caps on the BOD bottles were too tight and no air could get in, disrupting normal gas exchange. That would cause the duckweed to die and release phosphorous. Another reason why only the pond water showed positive results could be because the duckweed was raised in the pond water and became adapted to its specific oxygen and nutrient levels. This could cause it to flourish in the pond sample and die in the tap and well water. Also, some human error could have caused the results. A pond water sample had to be thrown out because the device used to filter out the duckweed had a backup of tap water which mixed with the sample. The same thing could have happened to our other samples without being noticed. Based on the research I found by other people on this subject; our results after the experiment disagreed with that of the other people, who performed a similar experiment using duckweed. In our experiment, the phosphorous levels of the different water samples were raised after the duckweed was left in them for a few days, while in other experiments the phosphorous levels were lowered after. There are several things that could be done to improve the experiment. If all the bottles had the same number of duckweed plants in them instead of an approximation, the data would have been more accurate. It might also be good to use a different device to separate out the duckweed from the water samples to eliminate contamination problems. Of course, more samples and more sources would have given a broader set of data. WILNELY PORTION - TABLE/GRAPH/ RESULTSMark's PortionQ2This experiment answered two questions; What are the phosphorus levels of various water samples? and How effective is duckweed in the remediation of these samples? These questions were asked so that we could determine not only how effective duckweed is at removing phosphorus but also to see how great a need there is for phosphorus remediation. The following results, we believe, accurately answers the first of these questions. The following duckweed results may not be entirely accurate and cannot be taken fully at face value. Viewer discretion is advised. Q4Procedure:
|