Sink and Swim
Lauren Johnston
Collingwood School
Floor Location : M 125 V

My project focuses on cleaning up the pollution created by sunken ships as they release heavy metals (specifically lead) into the environment. I compared the ability of algae (Chlamydomonas reinhardtii, Spyrogyra sp., Ulva sp., Volvox aureus, and Sargassum sp.) and bacteria (Staphylococcus aureus, Vibrio fisceri, Pseudomonas fluorescens, and Cellulomonas sp.) to bioremediate lead.rn rnMy experiment was comprised of two main trials; one for algae and one for bacteria. Lead was dissolved in vinegar before being put into a flask of distilled water with either algae or bacteria inside. The lead content was measured at the start of the trial and after five hours, one day, three days, five days, and ten days.rnrnI was able to conclude that phytoremediation (algae, specifically Ulva sp.) is more effective in cleaning up lead than bioremediation (bacteria). I hope to conduct further tests to determine the pH levels at which algae and bacteria are able to both survive and absorb lead.rn