I am doing a science fair project on phytoremediation, which is how plants can take out the bad things in their environment. I am using duckweed in a container with water, the duckweed has been growing for about a week, so much so that it has already covered the entire surface of the 8in by 8in container it is in. I think it is time to start distributing my duckweed into other containers. Each container will have a different amount of copper in it, and every day I will test the water to see if the copper is less than it was the day before.
My problem is how do I get the copper into the water? My teacher suggest putting copper sulfate into the water, but I am trying to find other ways I can do it. Perhaps there is a household item that contains copper I could use? I dont want to have to order it on Amazon, but I will if I have to.
Please any suggestions.