2 research outputs found
Distribution of the Rare Earth Elements in the Sediments of the Bouregreg River (Morocco) Using the Instrumental Neutron Activation Analysis (INAA).
Rare earth elements (REE), define a group of fifteen chemical elements
from lanthanum to lutetium (atomic numbers 57-71) characterized by
similar chemical properties. To study their distribution in sediment
samples of the Bouregreg river and its tributaries, 10 sampling sites
have been chosen. The collected sediment samples were analysed by
instrumental neutron activation analysis (INAA) using the Orph\ue9e
and Osiris reactors of CEA Saclay (France). The chondritic
normalisation curves show enrichment in light rare earth elements
(LREE), a negative Eu anomaly in several samples, and a progressive
depletion of heavy rare earth elements (HREE). Two hypotheses are
discussed: the nature of parent rocks of these sediments and the
phisico-chemical conditions of sedimentation especially complexation
and oxydo-reduction phenomenons
Distribution of the Rare Earth Elements in the Sediments of the Bouregreg River (Morocco) Using the Instrumental Neutron Activation Analysis (INAA).
Rare earth elements (REE), define a group of fifteen chemical elements
from lanthanum to lutetium (atomic numbers 57-71) characterized by
similar chemical properties. To study their distribution in sediment
samples of the Bouregreg river and its tributaries, 10 sampling sites
have been chosen. The collected sediment samples were analysed by
instrumental neutron activation analysis (INAA) using the Orphée
and Osiris reactors of CEA Saclay (France). The chondritic
normalisation curves show enrichment in light rare earth elements
(LREE), a negative Eu anomaly in several samples, and a progressive
depletion of heavy rare earth elements (HREE). Two hypotheses are
discussed: the nature of parent rocks of these sediments and the
phisico-chemical conditions of sedimentation especially complexation
and oxydo-reduction phenomenons