Decontamination of Heavy Metals in Polluted Soil by Phytoremediation Using Bryophyllum PinnatumP. A. Ekwumemgbo, N. O. Eddy and I. K. OmoniyiE3S Web of Conferences, 1 (2013) 13004DOI: https://doi.org/10.1051/e3sconf/20130113004