INEPO APPLICATION |
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| Country/Ülke | ||||
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Republic of Korea(South Korea)
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| Jury: Male | ||||
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Name : |
Jin Bong |
Surname : |
Lee | |
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Branch : |
Environment Chemistry | |||
Title:
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Chemistry teacher | |||
| 1st STUDENTS: Female | ||||
| Name: |
Hyun Young | Surname: |
Lee |  |
| Date
of Birth: |
Jan. 23th, 1991
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| 2nd
STUDENTS:
Female
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| Name: |
Jung Hwa | Surname: |
Lee |  |
| Date
of Birth: |
Nov. 16th, 1990
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| Project Name: | ||||
| Comparison of several common material’s filtering efficiency of Heavy metals which are included in road rain water | ||||
| Project Type: | ||||
| Environment-Chemistry | ||||
| Project to Summarize: | ||||
| 'Non-point pollutant sources' are not certain pollutants, but refer to comprehensive pollutants coming from the environment. U.S. Environmental Protection Agency (E.P.A) said that rain water is a good example of the non-point pollutant sources that are discharged from farmland, forest land, mine, buildings, reclaimed land, and urban regions etc.(Baek et.al, 2005) In this study, we measured the amount of heavy metal in the rainwater on the road that is thought to be the most influential non-point pollutant sources. And, we filtered mock road rainwater by using several common materials and compared the filtration efficiencies of each filtration materials, with the purpose of curbing the environmental pollution. First, we collected dusts from the same-sized areas of the three different roads around Uijeongbu Science high school that have different features in terms of surroundings and a traffic volume. We designed and built a filtration equipment to filter heavy metals in mock road rain water. We put a water tank with a partition above the filter column to maintain constant velocity of filtration. We filtered the mock road rainwater by maintaining the water in the tank connected to column full. We chose to make the rainwater flow upward, in which bigger particles can not reach to the filter column, instead of making it flow downward, which has high chances for the bigger particles to clog the pores of the filtration materials. Based on sufficient preceding research, we also used sawdust, charcoal, non-woven fabric and chaff as filtration materials, which are easy to find and are well known for its filtration effects. After filtration process, we mixed the filtered sample with acetic acid and kept it in cold storage for 20 hours to detach heavy metal from the bigger particles. We analyzed the percentages of major heavy metals in the filtered samples, including the mock road rainwater, by using ICP-OES. The analysis of these experiment shows that, among the three mock road rain water samples, the sample collected from where the volume of passengers is the largest and that of stores is biggest had the highest concentration of heavy metals. It means that the surroundings such as traffic volume have an impact on the concentration of heavy metals in dust on the road. Zn shows the highest concentration among the heavy metals in the mock road rainwater. The most efficient filtration material is sawdust, and follows chaff. We have to increase the time of filtration and check the following changes of the concentration in the rainwater in order to analyze the exact efficiency in reducing the concentration of the heavy metal. We also need to adopt this filtration equipment to real life, so we can have the developed version of the equipment we can exploit in the real world. | ||||