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Toxic Metals in Soil-Plant Systems (Hardcover)
Loot Price: R13,205
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Toxic Metals in Soil-Plant Systems (Hardcover)
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While not all metals in Soil----plant systems are inherently toxic,
particularly in low concentrations, there is an increasing
incidence of metal pollution from aerial fallout, spoils, wastes
and agricultural amendments including sewage sludge. Toxic Metals
in Soil----Plant Systems discusses the processes of trace--metal
cycling in contaminated ecosystems under conditions where their
concentrations become toxic through high loading rates, long--term
exposure or altered environmental conditions. Other environmental
and pedological concentration mechanisms are discussed, including
cation exchange and anion adsorption onto different soil materials.
The book is divided into two sections; the first part discusses the
sources and fates of metals in ecosystems, with an up--to--date
review of the processes which control metal speciation in soils,
metal uptake mechanisms, and plant responses to toxic metal
concentrations in soils. A clear understanding of these processes
and their interactions in soil is necessary before it is possible
to instigate amelioration and restoration programmes for
metal--contaminated land. In the second part of the book, a
selection of case studies are presented which discuss metal
toxicities and metal cycling in a range of different ecosystems,
including managed agricultural systems, deciduous woodland, upland
heather moorland, and tropical wetlands. In these studies a number
of current issues are addressed, including the setting of toxicity
thresholds for safe sewage sludge application to agricultural land,
the accumulation of soil metals over time in aerially impacted
systems, and metal transfers between ecosystem compartments, which
are of particular concern in food crops. Providing an integrated
view of toxic metals both in the soil and associated growing
plants, this book covers a wide range of topics including
agriculture, soil science, ecology and forestry and will be of use
to researchers and environmental consultants working in these
fields.
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