Detoxification of Heavy Metals
Soil Biology 30 Detoxification of Heavy Metals Bearbeitet von Irena Sherameti, Ajit Varma 1. Auflage 2011. Buch. xxviii, 448 S. Hardcover ISBN 978 3 642 21407 3 Format (B x L): 15,5 x 23,5 cm Gewicht: 871 g Weitere Fachgebiete > Chemie, Biowissenschaften, Agrarwissenschaften > Botanik Zu Inhaltsverzeichnis schnell und portofrei erhältlich bei Die Online-Fachbuchhandlung beck-shop.de ist spezialisiert auf Fachbücher, insbesondere Recht, Steuern und Wirtschaft. Im Sortiment finden Sie alle Medien (Bücher, Zeitschriften, CDs, eBooks, etc.) aller Verlage. Ergänzt wird das Programm durch Services wie Neuerscheinungsdienst oder Zusammenstellungen von Büchern zu Sonderpreisen. Der Shop führt mehr als 8 Millionen Produkte. Chapter 2 Plants in Heavy Metal Soils Hermann Bothe 2.1 Heavy Metal Soils Heavy metals have a molecular mass >5.0 g cmÀ3 which is distinctly higher than the average particle density of soils (2.65 g cmÀ3). Several heavy metals such as iron (Fe), manganese (Mn), zinc (Zn), copper (Cu), cobalt (Co), or molybdenum (Mo) are essential for the growth of organisms. Others have a single function and only in some organisms such as vanadium (V) in some peroxidases and in V- nitrogenases or nickel (Ni) in hydrogenases. The remainder of the heavy metals is always toxic to organisms: cadmium (Cd), lead (Pb), uranium (U), thallium (Tl), chromium (Cr), silver (Ag), and mercury (Hg). Arsenic (As) and selenium (Se) are nonheavy metals. However, since they partly share toxicity features with heavy metals, they are often referred to as “metalloids” in publications. All soils contain heavy metals. In nonheavy metal soils, the concentrations of Zn, Cu, Pb, Ni, Cd and Cr range between 0.0001 and 0.065%, whereas Mn and Fe can reach 0.002% and 10.0%, respectively (Ernst 1974).
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