Click your mouse pointer over your favorite state to obtain a listing of that state's soil Fe, Pb, and Cr content as well as a photo of the corresponding soil sample.
Is the general notion that high chromium content goes along with high iron content in soil true in the context of your results?
The EPA is a good chromium resource. Visit http://www.epa.gov/ttn/atw/hlthef/chromium.html for information on chromium in air. The EPA's drinking water standards and maximum allowable concentrations are at http://www.epa.gov/safewater/mcl.html Finally, all you need to know about chromium (such as where it comes from, its redox chemistry in the environment, and how Erin Brockovitch received a 1 million dollar bonus) is in your supplemental course material on blackboard.
Please go to Professor Hillary Arnold-Godwin's homepage for information on lead in the environment at http://www.chem.nwu.edu/~hagodwin/index.html
Chemistry 101 • Northwestern University • Fall 2002
EXTRA SPECIAL THANKS TO JANET MAHER AND DR. PATRICIA TODEBUSH FOR ORGANIZING THE EXPERIMENT AND DEALING WITH THE JPG'S AND SPECIAL THANKS TO SAMAN SHAFAIE FOR ALLOWING THE USE OF THE ICP-MS IN THE NU-CHEMISTRY-ANALYTICAL SERVICES FACILITY