Experimenting with Env“iron”mental Substances

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Students taking AP Environmental Science at Elwood-John H. Glenn High School participated in a citric acid remediation lab experiment led by representatives from the Brookhaven National Laboratory.

Prior to the visit, scientists at the Brookhaven National Laboratory separated the metal in soil samples by washing it with citric acid. For the class lesson, representatives brought the citric acid and metal mixed solution. Students were instructed to follow the scientific steps to quantify the amount of iron present in the soil, using the 1,10-phenanthroline method.

After completing the final step in the procedure, students measured the absorbance of the liquid using a spectrophotometer and determined the concentration of iron in the soil sample.