Heavy metals are severe environmental pollutants, and many of
them are toxic even at very low concentrations. With industrial
development, soil pollution with heavy metal elements have
dramatically increased. The uptake of heavy metals via plants that
are exposed to contaminated soils is a risk for human health and a
major hazard for the ecosystem as a whole, including soil
microorganisms. On the other hand, plants may be used in the
decontamination of soils.
The topics presented in this book include: sources of heavy
metals contaminants in soils; plant species that can grow on
contaminated soils; the phytoremediation of contaminated soils;
tolerance, accumulation and detoxification mechanisms of zinc,
copper, arsenic, cadmium and vanadium in plants; the critical role
of sulfur metabolism in heavy metal tolerance; the role of aquatic
macrophytes, plant growth-promoting bacteria, sugar crops and
earthworms in detoxification; and heavy metal stabilization by
promoting zeolite synthesis in soils.
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