Title

The effect of the microalgae, Chlorella vulgaris vs. the coccolithophorid algae, Emiliania huxleyi fertilized with different concentrations of an iron nitrate solution on the bio sequestration of carbon dioxide

Author(s)

Alekhya Mitta

School Name

Spring Valley High School

Grade Level

10th Grade

Presentation Topic

Environmental Science

Presentation Type

Non-Mentored

Abstract

The concentrations of carbon dioxide in the atmosphere have risen to more than 380 ppm in the past decade, increasing global warming, climate change, and biological extinctions. The purpose of this study was to determine which algae, coccolithophorid algae or microalgae, fertilized with which concentration of a Fe(NO₃)₃ solution could best sequester carbon dioxide. The coccolithophorid algae, Emiliania huxleyi and the microalgae, Chlorella vulgaris were fertilized with different concentrations of iron in order to determine which combinations of both variables could capture the most carbon dioxide. It was hypothesized that both Emiliania huxleyi and Chlorella vulgaris would sequester the most carbon dioxide with the highest level of ferric nitrate. It was also hypothesized that Emiliania huxleyi would sequester the most carbon compared to the other algae. The two algae were grown and then fertilized with the different concentrations of a Fe(NO₃)₃ solution, which were 1ml, 1,5ml, 2ml, and 3ml from a 0.004M solution. They were then allowed a week to grow and the dry mass of each was taken, recorded, and compared. An ANOVA test done with the data from both types of algae showed that (F(9,140)=203.66, p<0.001). This rejected the null hypothesis. A Tukey test was done and it showed that all of the variables had significant differences except the 2nd and 4th concentrations for the microalgae. Emiliania huxleyi captured the most carbon dioxide and grew the most at the highest concentration of iron while Chlorella vulgaris grew the best at the 3rd highest concentration.

Start Date

4-11-2015 3:00 PM

End Date

4-11-2015 3:15 PM

COinS
 
Apr 11th, 3:00 PM Apr 11th, 3:15 PM

The effect of the microalgae, Chlorella vulgaris vs. the coccolithophorid algae, Emiliania huxleyi fertilized with different concentrations of an iron nitrate solution on the bio sequestration of carbon dioxide

The concentrations of carbon dioxide in the atmosphere have risen to more than 380 ppm in the past decade, increasing global warming, climate change, and biological extinctions. The purpose of this study was to determine which algae, coccolithophorid algae or microalgae, fertilized with which concentration of a Fe(NO₃)₃ solution could best sequester carbon dioxide. The coccolithophorid algae, Emiliania huxleyi and the microalgae, Chlorella vulgaris were fertilized with different concentrations of iron in order to determine which combinations of both variables could capture the most carbon dioxide. It was hypothesized that both Emiliania huxleyi and Chlorella vulgaris would sequester the most carbon dioxide with the highest level of ferric nitrate. It was also hypothesized that Emiliania huxleyi would sequester the most carbon compared to the other algae. The two algae were grown and then fertilized with the different concentrations of a Fe(NO₃)₃ solution, which were 1ml, 1,5ml, 2ml, and 3ml from a 0.004M solution. They were then allowed a week to grow and the dry mass of each was taken, recorded, and compared. An ANOVA test done with the data from both types of algae showed that (F(9,140)=203.66, p<0.001). This rejected the null hypothesis. A Tukey test was done and it showed that all of the variables had significant differences except the 2nd and 4th concentrations for the microalgae. Emiliania huxleyi captured the most carbon dioxide and grew the most at the highest concentration of iron while Chlorella vulgaris grew the best at the 3rd highest concentration.