application of a sequential partial extraction procedure to investigate uranium, copper, zinc, iron and manganese partitioning in recent lake, stream and bog sediments, northern saskatchewan / by douglas andrew warren lehto. --
abstract
sequential partial extractions show that partitioning of uranium,
copper, zinc, iron and manganese into lake, stream and bog sediments
are affected by the type and abundance of component fractions present
in sediments and by the physico-chemical conditions of the superjacent
waters. the water ph influences the concentration of uranium retained
by organic matter as well as the relative proportion partitioned into
the amorphous iron hydroxide fraction and the humic and fulvic acid
components of the organic matter fraction. copper partitioning is
controlled by the percent carbon content of sediments which influences
the concentration of metal retained in the organic matter fraction.
the amount of copper retained by other component fractions is determined
by their relative abundance in sediments. the eh-ph conditions
of the superjacent waters control the solubilities of iron, manganese
and zinc thereby affecting the availability and sorption of these
metals into the organic matter and inorganic hydroxide fractions of
sediment. metal partitioning characteristics and physico-chemical
factors which influence metal partitioning should be considered when
using lake, stream and bog sediments in geochemical exploration.
collections
- retrospective theses [1604]